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  • 201.
    Eriksson, Lars
    et al.
    Jönköping University, Jönköping, Sweden.
    Rosén, Bengt Göran
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Bergman, Martin
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Affective surface engineering- using soft and hard metrology to measure the Sensation and perception in surface properties2018In: Proceedings of NordDesign: Design in the Era of Digitalization, NordDesign 2018, The Design Society , 2018Conference paper (Refereed)
    Abstract [en]

    New surface treatments, novel material developments, and improved quality control procedures and advanced metrology instrumentation create a possibility to further develop competitiveness by the selection of “optimal” surface features”, to a product. The customers first apprehension of a product and the creation of desire is a very complex, but tempting process to learn more about. The interaction between the added quantitative- and the qualitative direct impressions with the customers known and unknown functional demands, social background, and expectations results in sensation and perception, partly possible to quantify and to great extent impossible to pin-down as numbers. Customer sensation and perception are much about psychological factors. There has been a strong industrial- and academic need and interest for methods and tools to quantify and linking product properties to the human response but a lack of studies of the impact of surfaces. This paper aims to introduce a novel approach to develop and join a human sensoric inspired metrology frame-work with qualitative gradings of apprehended impressions of products with varying surface properties. The aim is to establish the metrology framework to link measurable- and unmeasurable impressions of product surfaces to customer FEELING as exemplified by a set of industrial applications. In conclusions of the study, future research in Soft metrology is proposed to allow understanding and modelling of product perception and sensations in combination with a development of the Kansei Surface Engineering methodology and software tools. © Proceedings of NordDesign: Design in the Era of Digitalization, NordDesign 2018. All rights reserved.

  • 202.
    Eriksson, Martin
    et al.
    Validus Engineering AB, Staffanstorp, Sweden.
    Bjärnemo, Robert
    Department of Design Sciences LTH, Lund University, Lund, Sweden.
    Motte, Damien
    Department of Design Sciences LTH, Lund University, Lund, Sweden.
    Petersson, Håkan
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Integrating Engineering Design and Design Analysis Activities at an Operational Level2017In: Proceedings of the 11th International Workshop on Integrated Design Engineering / [ed] Meyer, A., Schirmeyer, R. & Vajna, Sandor, Magdeburg, 2017, Vol. 11, p. 69-80Conference paper (Refereed)
    Abstract [en]

    Computer-based design analysis is nowadays of utmost importance in most engineering design projects. However, this brings some challenges, among them that of the collaboration between engineering designers and design analysts. Since they work with, and are responsible for, different areas, they do not necessarily have full insight into each other’s way of working. The issue of integration between the design analysis process and the engineering design process is thus of major significance for providing an increase in efficiency and effectiveness in engineering design and development of products. In this work, an approach is proposed aiming at providing this increase in efficiency and effectiveness. Based on the analysis of the information workflow between the engineering design process and the design analysis process, a mapping of the necessary interactions between engineering designers and design analysts can be made. The presented approach facilitates this mapping. An application of this approach to an industrial project is also presented.

  • 203.
    Eriksson, Martin
    et al.
    Faculty of Engineering (LTH), Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Faculty of Engineering (LTH), Lund University, Lund, Sweden.
    Petersson, Håkan
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Tillämpad konstruktion (Digitala verktyg).
    Motte, Damien
    Faculty of Engineering (LTH), Lund University, Lund, Sweden.
    A process model for enhanced integration between computer-based design analysis and engineering design2016Manuscript (preprint) (Other academic)
    Abstract [en]

    The findings from a survey in industry and from an extensive literature survey revealed the need for the development of an integrated process model for computer-based design analysis (CBDA) facilitating the interactions in the engineering design process in mechanical engineering on an operational level. CBDA is here confined to the utilization of advanced computational methods and tools from computer aided engineering (CAE), such as computational structural mechanics (CSM), computational fluid dynamics (CFD) and multi-body systems (MBS). In order to facilitate integration to the multitude of engineering design process models in industrial practice, including overall processes such as product innovation and product development, the process model needs to be adaptive and generic. Generic should here be interpreted as not being dependent on any specific type of product, engineering design process, or on any specific type of product innovation and/or product development process models utilized by an enterprise. Resulting from synthesis processes based on the findings from surveys and experiences gained from design analysis projects in industrial practice, the generic design analysis process (GDA) model was developed. The application of the GDA process model is exemplified by four examples, which have been utilized for validation of the process model.

  • 204.
    Eriksson, Martin
    et al.
    Lund University, Lund, Sweden.
    Petersson, Håkan
    Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Lund University, Lund, Sweden.
    Motte, Damien
    Lund University, Lund, Sweden.
    Interaction between Computer-Based Design Analysis Activities and the Engineering Design Process – An Industrial Survey2014In: DS 77: Proceedings of the DESIGN 2014 13th International Design Conference / [ed] Dorian Marjanović, Mario Štorga, Neven Pavković & Nenad Bojčetić, Zagreb: University of Zagreb , 2014, Vol. 2, p. 1283-1296Conference paper (Refereed)
    Abstract [en]

    In the large majority of product development projects, computer-based design analyses are performed to assess the feasibility of potential technical solutions. As a first step to bring about a deeper understanding of the interactions between the engineering design and the design analysis activities, a survey has been performed in industry. The results of the survey cover: the use of design analysis within product development, the interactions of engineering design along the design analysis process, and the treatment of uncertainties and errors connected to the design analysis activities.

  • 205.
    Eriksson, Martin
    et al.
    Validus Engineering AB, Staffanstorp, Sweden.
    Petersson, Håkan
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Motte, Damien
    Faculty of Engineering (LTH), Lund University, Lund, Sweden.
    Bjärnemo, Robert
    Faculty of Engineering (LTH), Lund University, Lund, Sweden.
    Utilizing the Generic Design Analysis (GDA) Process Model within an Extended Set of Design Analysis Contexts2017In: Proceedings of the ASME 2017 International Mechanical Engineering Congress & Exposition: IMECE2017, New York: ASME Press, 2017, article id V011T15A028Conference paper (Refereed)
    Abstract [en]

    In most industrial product development projects, computer-based design analysis, or simply design analysis, is frequently utilized. Several design analysis process models exist in the literature for the planning, execution and follow-up of such design analysis tasks. Most of these process models deal explicitly with design analysis tasks within two specific contexts: the context of design evaluation, and the context of design optimization. There are, however, several more contexts within which design analysis tasks are executed. Originating from industrial practice, four contexts were found to represent a significant part of all design analysis tasks in industry. These are:

    1. Explorative analysis, aiming at the determination of important design parameters associated with an existing or predefined design solution (of which design optimization is a part).

    2. Evaluation, aiming at giving quantitative information on specific design parameters in support of further design decisions.

    3. Physical testing, aiming at validating design analysis models through physical testing, that is, determining the degree to which models are accurate representations of the real world from the perspective of the intended uses of the models.

    4. Method development, that is the development, verification and validation of specific guidelines, procedures or templates for the design analyst and/or the engineering designer to follow when performing a design analysis task.

    A design analysis process model needs to be able to deal with at least these four. In this work, a process model named the generic design analysis (GDA) process model, is applied to these four contexts. The principles for the adaptation of the GDA process model to different contexts are described. The use of the GDA process model in these contexts is exemplified with industrial cases: explorative analysis of design parameters of a bumper beam system, the final physical acceptance tests of a device transportation system (collision test, drop test, vibration test), and the method development of a template for analyzing a valve in a combustion engine. The "Evaluation" context is not exemplified as it is the most common one in industry.

    The GDA process model has been successfully used for the four contexts. Using the adaptation principles and industrial cases, the adaptation of the GDA process model to additional contexts is also possible. © 2017 by ASME

  • 206.
    Eriksson, Robin
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Heat storages in Swedish district heating systems: An analysis of the installed thermal energy storage capacity2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    District heating is the most common source of heating in Sweden and has played a crucial part in the country’s substantial reductions of carbon dioxide emissions. This recycling technology is ideal in order to use thermal energy as efficiently as possible and makes the goals set for a sustainable future more achievable. The future potential of this technology is therefore huge. Today, a lot of the district heating systems have installed heat storages in order to improve the systems reliability and performance. These heat storages have the potential to be utilized even further in the future by acting as a balancing power for the power grid. However, there is currently no data available regarding the storage capacity available in the district heating systems. This thesis therefore seeks to quantify the installed storage capacity in Swedish district heating systems. The data gathered regarding this can then be utilized in research regarding potential future applications of heat storages, such as balancing the power grid. All collected data regarding heat storage capacity has also been analyzed in an effort to find any correlations between the relative storage capacity and the size, energy sources, customer prices and operational costs of each investigated system. This analysis has concluded that most of the district heating systems in Sweden have installed storage capacity and that it is more commonly used in larger systems. It is also concluded that most of the installed storage capacity is used to counteract daily heat load variations. The heat storages influence district heating systems by reducing their operational costs as well.

  • 207.
    Eriksson, Robin
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Johansson, Alexander
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Energieffektivisering av bostäder: En analys av åtgärder som kan förbättra energiprestandan i flerbostadshus2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Efficient energy use in the housing sector is crucial for achieving a sustainable society. The expansion of this sector only represents a fraction of the existing houses, hence it’s within the existing houses the potential for energy savings lie. This potential has been analyzed in order to determine if it’s possible to cut the current energy demand in half. An ongoing renovation project was used as a reference to evaluate the different measures that can increase a buildings efficiency. The measures evaluated were also compared to similar ones from other projects. The main methods examined were ventilation systems utilizing heat exchangers, energy efficient windows and glazed balconies. Based on cost efficiency and amount of energy saved, the results were then evaluated and compared to one another. This showed that the cost efficiency for the different measures varied depending on the size of the building, meaning the different measures should be prioritized in different scenarios. It was concluded that it’s theoretically possible cut the current energy demand of the housing sector in half, but very hard and costly to achieve in reality.

  • 208.
    Eriksson, Torbjörn
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Kriborg, Simon
    Halmstad University, School of Business, Engineering and Science.
    Stillasittande - Ansvarstagande miljö: Utvecklande av stödjande teknik i befintlig miljö2016Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Människans anatomi och fysiologi har inte genomgått större förändringar på 50 000 år, under de senare århundradena har dock enorma förändringar av människans fysiska aktivitet skett. På senare tid har stillasittande seglat upp som en oberoende riskfaktor skiljt från rekommendationer om motion. Att lyfta stillasittande till lågintensiv fysisk aktivitet så som gående, anses vara den största möjligheten för att förebygga riskerna (så som diabetes, hjärt- och kärlsjukdomar mm) till följd av långvarigt stillasittande.

    Problematiken togs upp i ett utvecklingsprojekt inom hälsoinnovation med syfte att öka muskelaktivering i vardagsmiljö, där aspekten att aktuella produkter är individuella, men problematiken finns på gruppnivå framkom. Deltagarna i projektet var utöver Linus Ståhl och Andrea Cardenbäck även Torbjörn Eriksson, som tillsammans med Simon Kriborg skapade detta examensarbete med inriktning på arbetsmiljö. Examensarbetet avsåg att visa hur ansvaret för att inte guida in människor i ohälsosamt stillasittande, kan ligga på den befintliga miljön.

    Examensarbetet inleddes i egen regi men knöt snabbt samarbetsavtal med Hälsoteknikcentrum Halland. Projektet har genomförts på bred front där såväl detektion av sittande, databehandling, återkoppling behandlats genom litteraturstudier, iterativ produktutvecklingsmetodik med 6-3-5 metoden, Pughs utvärderingsmatris samt avslutande prototypbygge, där delar genomförts tillsammans med samarbetspartnern Bosbec. Då delar av projektet legat utanför Projektgruppens (PG) scope of practice har förankring av införskaffad information inom områdena verifierats genom intervjuer med verksamma inom respektive område. Vidare har användarinvolvering skett genom projektets gång i olika former.

    Resultatet av projektets ena del är en föreslagen vägghängd återkopplande produkt, med upplyst sittande person i olika färger för att spegla risknivån av fortsatt sittande av individerna i gruppen. Vid rekommendation om att gruppen bör avbryta det kollektiva sittandet, tänds även en efter arbetsmiljöverkets föreskrifter utformad påbudsskylt föreställande en person resandes från en stol. Vid färgskiftningarna spelas även ett ljud upp för att kunna involvera fler grupper. Resultatet av den andra del är egentillverkade sittsensorer med bra upplevd respons, speciellt i förhållande till deras kostnadseffektivitet som väckt intresse hos samarbetspartner för fler eventuella tillämpningsområden inom hälsotekniksområdet. Ett usability test utfördes på en första enkel prototyp utan ljudåterkoppling i form av en cognitive walkthrough (CW) med resultatet att testdeltagarna förstod skylten och hur deras beteende påverkade återkopplingen. Med kostnadseffektiva sensorer och initialt testad och förbättrad återkopplande produkt med ljus och ljud, har presenterad produkt potential att lyfta medvetenheten om risker med stillasittande. 

  • 209.
    Erlandsson, Andreas
    Halmstad University, School of Business, Engineering and Science.
    Simulation driven design: An iterative approach for mechanical engineers with focus on modal analysis2015Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis of 15 hp has been implemented at Halmstad University, in collaboration with Saab Dynamics in Linköping. Saab Dynamics is a company operating in the defence industry where competition is tough. This necessitates new ways to increase efficiency in the company, which is the basis for this thesis.

    Saab Dynamics wants to introduce simulation driven design. Since Saab Dynamics engineers have little experience of simulation, required a user methodology with clear guidelines. Due to lack of time, they chose to assign the task to students, which resulted in this thesis.

    The aim of the thesis is to develop a methodology in mechanical design, where the designer uses the FE analysis early in the design process to develop the structures' mechanical properties. The methodology should be seen as a guide and a source of information to enable an iterative approach with FE-analysis, which is the basis of simulation-driven design. The iterative process of simulation driven design, which can lead to reduced lead times and cost savings in the design process.

    The work was carried out by three students from the mechanical engineering program between December 2014 and May 2015. Because of the scale of the project, it has been carried out by a total of three students with individual focus areas.

    The work has followed a self-developed method and the project began with theoretical studies of the topic to get an understanding of what has been done and what research in simulation driven design. Then conducted an empirical study on the Saab Dynamics in Linköping, in order to increase understanding of how the design process looks like. Meanwhile, sustainable development and ethical aspects has been taken into account.

    Much time has been devoted to investigate the possibilities and limitations of 3D Experience, which is Dassault Systèmes latest platform for 3D modelling- and simulation software. 3D Experience is the software, the methodology is based on. This thesis has resulted in a methodology for simulating at the designer level that the project team in consultation with the supervisor at Saab Dynamics managed to adapt to the company's requirements.

  • 210.
    Erlandsson, Mikael
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Björkheim, Johan
    Halmstad University, School of Business, Engineering and Science.
    ExFlex Glove: Ett träningsredskap för att stärka upp hand- och underarmsmuskulaturen hos äldre och artrospatienter2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 211.
    Erlandsson, Sara
    et al.
    Halmstad University.
    Wellberg Bengtsson, Martina
    Halmstad University.
    "Våga lämna flocken": En fallstudie kring samverkan mellan privat och offentlig sektor2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Youth unemployment is currently a major problem in Europe. Young people have a harder time getting a full time job than 20 years ago. In cooperation with Arbetsförmedlingen (the Employment Service) Swedbank started the project Unga Jobb in order to get more young job- seekers into the labor market.

    The purpose of the study was with a qualitative method to get a better understanding of the iniative Unga Jobb and what collaboration means for the main stakeholders Arbetsförmedlingen (the Employment Service) and Swedbank. The purpose was also to study and analyze how Arbetsförmedlingen (the Employment Service), Swedbank and the community can take advantage of positive impacts of the project and how negative impacts of the project can provide lessons and be avoided.

    The study was conducted as a qualitative case study. The survey consisted of eight interviews with respondents from Arbetsförmedlingen and Swedbank.

    The main conclusion we can draw from the study is that the corporation is positive and needed to resolve difficult issues such as youth unemployment. It is important to work for better and more effective action and find solutions that are good for all parties, namely the community, organizations and individuals. 

  • 212.
    Ernst, Robert
    et al.
    Halmstad University, School of Information Technology.
    Nilsson, Emil
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), MPE-lab.
    Viberg, Per-Arne
    Swedish Adrenaline AB, Halmstad, Sweden..
    60GHz Vital Sign Radar using 3D-printed Lens2016In: 2016 IEEE SENSORS, Piscataway: IEEE, 2016, article id 7808774Conference paper (Refereed)
    Abstract [en]

    There is an increased interest in contact-less vital sign monitoring methods as they offer higher flexibility to the individual being observed. Recent industrial development enabled radar functionality to be packed in single-chip solutions, decreasing application complexity and speeding up designs. Within this paper, a vital sign radar has been developed utilizing a recently released 60GHz frequency modulated continuous wave single-chip radar in combination with 3D-printed quasi-optics. The electronics development has been focused on compactness and high system integration using a low cost design process. The final experiments prove that the radar is capable of tracking human respiration rate and heartbeat at the same time from a distance of 1m.

  • 213.
    Etbaeitabari, Amir
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Barakat, M.
    Univ Denver, Denver, CO USA..
    Imani, A. A.
    Iran Islamic Azad Univ, Babol Branch, Babol Sar, Iran..
    Domairry, G.
    Univ Mazandaran, Dept Mech Engn, Babol Sar, Iran..
    Jalili, P.
    Islamic Azad Univ, Dept Mech Engn, Takestan Branch, Takestan, Iran..
    An analytical heat transfer assessment and modeling in a natural convection between two infinite vertical parallel flat plates2013In: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 188, p. 252-257Article in journal (Refereed)
    Abstract [en]

    Heat transfer by natural convection occurs in many physical problems and engineering applications such as geo-thermal systems, heat exchangers, petroleum reservoirs and nuclear waste repositories. These problems and phenomena are modeled by ordinary or partial differential equations. In most cases, experimental solutions cannot be applied to these problems, so these equations should be solved using special techniques. Recently, much attention has been devoted to these methods to construct analytic solutions; such as the perturbation method. Perturbation techniques are dependent upon small parameter. Thus, it is worthwhile developing a new technique independent of small parameter. The Reconstruction of Variational Iteration Method technique is a powerful and convenient algorithm in finding the solutions for the equations. While this method is capable of reducing the size of calculation, it overcomes the difficulty of the perturbation technique or Adomian polynomials by applying Laplace Transform. In this paper an analysis has been performed to study the natural convection of a non-Newtonian fluid between two infinite parallel vertical flat plates and the effects of the non-Newtonian nature of fluid on the heat transfer are studied. In order to compare with exact solution, velocity and temperature profiles are shown graphically. The obtained results are valid with significant accuracy. (C) 2013 Elsevier B.V. All rights reserved.

  • 214.
    Fager, Matilda
    Halmstad University, School of Business, Engineering and Science.
    Anpassad matlåda2017Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
  • 215.
    Fahlén, Erik
    Halmstad University, School of Business and Engineering (SET).
    FÖRBÄTTRINGSPROJEKT PÅ MICOR AB:S RIKTAVDELNING2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Micor AB tillverkar cirkulära sågklingor och är framförallt inriktade på specialbeställda cirkulära sågklingor från orderstorleken en och uppåt.  

    På uppdrag av Micor AB har en kartläggning av hur det dagliga arbetet går till på Micors riktavdelningen gjorts. På riktavdelningen riktar och sträcks cirkulära sågklingor. Anledningen till att de cirkulära sågklingorna riktas är för att de ska vibrera mindre och kunden ska få en finare snittyta vid kapningen. 

    Problemet de har på riktavdelningen är att tidigare och nuvarandes operatörers kunskap inte är dokumenterad. Den knapphändiga informationen om vad som påverkar spänningen hos en cirkulär sågklinga gör att variationen av spänning kan variera från ordertillfälle till ordertillfälle. Micor AB vill även underlätta upplärningen av nya operatörer.

    Som metod för att lösa problemet har en anpassning av Six Sigmas DMAIC-modell gjorts. 

    Kartläggningen av det dagliga arbetet har legat till grund för de arbets- och maskininstruktioner som har skapats för att minska variationen av spänningen i cirkulära sågklingor.

    Identifiering av vilka parametrar som påverkar spänningen på en cirkulär sågklinga har gjorts genom granskning av publikationer inom ämnet samt genom egna tester.

    Genom kartläggningen av vad som påverkar spänningen på cirkulära sågklingor kommer förhoppningsvis Micor AB att få mindre variationer i spänningen och det kommer att underlätta för framtida implementerad automatisering av riktavdelningen. 

  • 216. Falk, Karolina
    et al.
    Bogefors, John
    Svampstrimlare2014Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
  • 217.
    Fan, Yuantao
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research.
    Nowaczyk, Sławomir
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research.
    Rögnvaldsson, Thorsteinn
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS), CAISR - Center for Applied Intelligent Systems Research.
    Antonelo, Eric Aislan
    Federal University of Santa Catarina, Florianópolis, Brazil.
    Predicting Air Compressor Failures with Echo State Networks2016In: PHME 2016: Proceedings of the Third European Conference of the Prognostics and Health Management Society 2016 / [ed] Ioana Eballard, Anibal Bregon, PHM Society , 2016, p. 568-578Conference paper (Refereed)
    Abstract [en]

    Modern vehicles have increasing amounts of data streaming continuously on-board their controller area networks. These data are primarily used for controlling the vehicle and for feedback to the driver, but they can also be exploited to detect faults and predict failures. The traditional diagnostics paradigm, which relies heavily on human expert knowledge, scales poorly with the increasing amounts of data generated by highly digitised systems. The next generation of equipment monitoring and maintenance prediction solutions will therefore require a different approach, where systems can build up knowledge (semi-)autonomously and learn over the lifetime of the equipment.

    A key feature in such systems is the ability to capture and encode characteristics of signals, or groups of signals, on-board vehicles using different models. Methods that do this robustly and reliably can be used to describe and compare the operation of the vehicle to previous time periods or to other similar vehicles. In this paper two models for doing this, for a single signal, are presented and compared on a case of on-road failures caused by air compressor faults in city buses. One approach is based on histograms and the other is based on echo state networks. It is shown that both methods are sensitive to the expected changes in the signal's characteristics and work well on simulated data. However, the histogram model, despite being simpler, handles the deviations in real data better than the echo state network.

  • 218.
    Farshori, Armaan Hussain
    et al.
    Halmstad University, School of Business, Engineering and Science.
    De Pablo Escribano, David
    Halmstad University, School of Business, Engineering and Science.
    Viability of a New Fender in Market and a New Fender Design Proposal for Small Vessels.2016Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This dissertation has been carried out for AB Halmstads Gummifabrik (HGF) during the spring of 2016. The purpose of this thesis has been to do a market research on the company’s fender and to give a fender design proposal for small vessels. The expectation in the future is that the design proposal may be implemented into an actual product by the company, and released in the market. The project began with a meeting at HGF with Zaheer, where he gave us an overview and details about the project as well as an explanation of how the project needs to be developed. The project was performed mainly by following the David Ullman’s Methodology. Criteria’s were set together with Zaheer to carry out the research, different ports in different countries from all of the Europe were shortlisted and contacted, especially covering the Scandinavian area. The company’s fender covered a huge range of vessels existing in the European region, but there was gap which existed with the private or small vessels (i.e. Yachts, motorboats, etc.) which were due to the reason that the company’s fender only covered the industrial mid-sized vessels (i.e. Cargos, Tankers, etc.) To fill up the gap a fender design had to be proposed which in turn had to have compatibility with the smaller vessels. Product development was carried out with concept generation and other functionalities. When a concept was finalized a 3D CAD model was made with the help of Unigraphics NX software and 2D drawings were made for future references. The result was a fender design which was simulated and analysed successfully for a range of small vessel berthing using the Altair´s Inspire software.

  • 219. Fast, Johan
    et al.
    Schnitzler, Erik
    Duva2015Independent thesis Basic level (professional degree), 15 credits / 22,5 HE creditsStudent thesis
  • 220. Felixson, Anna
    et al.
    Höglund, Elin
    RehBrain2015Independent thesis Basic level (professional degree), 15 credits / 22,5 HE creditsStudent thesis
  • 221.
    Fischer, Viktoria
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Frost, Henrik
    Halmstad University, School of Business, Engineering and Science.
    Solvärme med kombinerad värmelagring i flerbostadshus2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this thesis is to examine the possibilities to incorporate solar heat and thermal energy storage to a newly produced apartment block with a low energy use. From HFAB we were given the block “Jordmåen” in Halmstad. “Jordmåen” that was complete in 2015, consists of 4 apartment buildings and fills its need of 669 MWh of thermal energy withdistrict heating.

    The thesis describes a theoretical study about solar heat and thermal energy storage. To establish a usable area for the solar panels, measurements of an actual building have been made, given to us by HFAB. We use actual data from the Buildings but with the assumption that the buildings aren’t built. Solar panels from ASV Solar are used in the measurements, and possible energy production has been calculated with the program PVGIS. The economic calculations are based on two methods, Pay-off and value approach.

    “Jordmåen” would be able to cover its heating needs from April to September and provide an addition of thermal energy for the remaining months, with 932 m2 of solar panels connected to a borehole thermal energy storage (BTES) with a degree of efficiency of 65 %. The payoff time for this system varies between 9 to 14 years, and the present worth varies between - 1 027 281 kr and - 22 343 kr, with the best outcome in a scenario with roof integrated solar collectors because of the savings of expensive roof material.

    The conclusion is that solar heat combined with heat storage is not a profitable investment when not using the full capacity of the thermal heat storage. Although some parameters are missing to establish the real profit we advise to do a more in-depth investigation to get a more accurate outcome.

  • 222.
    Florén, Henrik
    et al.
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Frishammar, Johan
    Luleå University of Technology, Luleå, Sweden.
    From Preliminary Ideas to Corroborated Product Definitions: Managing the Front End of New Product Development2012In: California Management Review, ISSN 0008-1256, E-ISSN 2162-8564, Vol. 54, no 4, p. 20-43Article in journal (Refereed)
    Abstract [en]

    Front-end activities largely influence the outcomes of new product development processes, because it is here that firms create new ideas, give them direction, and set them in motion. We show that the front end can be understood as comprising three core activities: idea/concept development, idea/concept alignment, and idea/concept legitimization, which allow firms to create corroborated product definitions. The paper provides important implications for managers interested in front-end management, and devote specific attention to the differences between incremental and radical front end development and to the front end in the light of increasingly open innovation processes. 

  • 223.
    Florén, Henrik
    et al.
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Gabrielsson, Jonas
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Lee, Carmen
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Survival Through Business Model Innovation: A Longitudinal Case Study from the Process Industries2014Conference paper (Refereed)
    Abstract [en]

    It is widely acknowledged that the design and quality of the business model is a main building block in what constitute a successful company. In this paper, we approach the critical question of how firms can successfully renew their business models over time. The aim is to identify the main sequences of events that precede business model innovation and which trigger evolutionary changes in how a firm develops and capture value. Theoretically, we approach business model innovation as an evolutionary phenomenon by emphasizing the dynamic and path dependent aspects of strategic change processes. Empirically, we employ a historical case study where we make an in-depth analysis of a firm in the process industry that has managed to innovate its business model several times since its inception. In all, the study identifies five main sequences of events related to customer value proposition, strategic investments, corporate identity, corporate structure, and value networks.

  • 224.
    Flys, Olena
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK). SP Technical Research Institute of Sweden, Borås, Sweden.
    Källberg, S.
    SP Technical Research Institute of Sweden, Borås, Sweden.
    Ged, G.
    LCM LNE-Cnam, Trappes, France.
    Silvestri, Z.
    LCM LNE-Cnam, Trappes, France.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Characterization of surface topography of a newly developed metrological gloss scale2015In: Surface Topography: Metrology and Properties, ISSN 2051-672X, Vol. 3, no 4, article id 045001Article in journal (Refereed)
    Abstract [en]

    In the European Joint Research Project 'Multidimensional Reflectometry for Industry', a new gloss scale was developed with the aim to represent different levels of gloss, hue, roughness, and refractive indices. In this paper, the surfaces of six selected samples were thoroughly investigated using various measuring techniques in order to verify the outcome of the novel manufacturing processes in terms of distinct levels as well as types of surface roughness. The aim of the evaluation was to capture surface structures in different wavelength intervals utilizing a confocal microscope, a coherence scanning interferometer, and an atomic force microscope. Power spectral density functions were also calculated from the measurements and used to determine suitability of techniques for different roughness scales. The measurements show that the expected surface characteristics as well as different RMS roughness values are intimately connected to the perceived glossiness.

  • 225.
    Forsberg, Tom
    Halmstad University, School of Business, Engineering and Science.
    Barriärnät med kassettlösning2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 226.
    Forsling, Ida
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Vestin, Ina
    Halmstad University, School of Business, Engineering and Science.
    Feedbackskenan: Utveckling av träningsredskap med återkopplingsfunktion vid valgus i knäleden under ett enbensknäböj2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 227.
    Forssén, Jens
    et al.
    Chalmers, Div Appl Acoust, Dept Civil & Environm Engn, Gothenburg.
    Schiff, Martin
    Lally Acoust Consulting, New York.
    Pedersen, Eja
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS).
    Persson Waye, Kerstin
    Univ. Gothenburg.
    Wind turbine noise propagation over flat ground: measurements and predictions2010In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959, Vol. 96, no 4, p. 753-760Article in journal (Refereed)
    Abstract [en]

    Noise from wind turbines is of concern in the planning process of new wind farms, and accurate estimations of immission noise levels at residents nearby are required. Sound propagation from wind turbine to receiver could be modelled by a simplified standard model assuming constant meteorological conditions, by an engineering method taking atmospheric and ground propagation conditions into account, or by a more exact model. Epidemiological studies have found a higher frequency of annoyance due to wind turbine noise than to other community noise sources at equal noise levels, indicating that the often used simplified model is not sufficient. This paper evaluates the variation of immission sound levels under the influence of meteorological variation and explores if the prediction of levels could be improved by taking the effect of wind speed on sound propagation into account. Long-term sound recordings and measurements at a distance of 530 m from a wind turbine show that the simplified standard model predicts the average sound pressure levels satisfactorily under downwind conditions, and that a more complex propagation model might not be needed for wind turbine noise at a relatively short distance. Large variations of sound immission levels at the same wind speed were however present. Statistical analysis revealed that these variations were influenced by meteorological parameters, such as temperature, static pressure and deviation from ideal downwind direction. The overall results indicate that meteorological factors influence the noise generated by the wind turbine rather than the sound propagation.

  • 228.
    Franke, Axel
    et al.
    Lund Institute of Technology, Sweden.
    Einewall, Patrik
    Lund Institute of Technology, Sweden.
    Johansson, Bengt
    Lund Institute of Technology, Sweden.
    Wickström, Nicholas
    Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE), Halmstad Embedded and Intelligent Systems Research (EIS).
    Reinmann, Raymond
    Fiat-GM Powertrain, Advanced Engineering, Sweden.
    Larsson, Anders
    Swedish Defence Research Agency, Sweden.
    The effect of in-cylinder gas flow on the interpretation of the ionization sensor signal2003Conference paper (Refereed)
    Abstract [en]

    The location of the peak pressure can serve as a control parameter to adjust ignition timing and optimize engine performance. The ionization sensor, an electrical probe for combustion diagnostics, can provide information about the peak pressure location. However, the reliability of such information is rather poor. In-cylinder gas flow at the electrodes may be one reason for this. We present results from an investigation of the relationship between ionization sensor current and pressure under various gas flow conditions. The gas flow velocity in the vicinity of the electrode gap was measured by LDA. From the results one may infer how the in-cylinder gas flow affects the reliability of the prediction of pressure peak location from the ionization sensor signal. One finding is that high bulk gas flow impairs the precision of the prediction in certain configurations.

  • 229.
    Frederiksen, Svend
    et al.
    Lund University, Lund, Sweden.
    Werner, Sven
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    District Heating and Cooling2013 (ed. 1)Book (Refereed)
  • 230.
    Fredh, Daniel
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Stolt, Jesper
    Halmstad University, School of Business and Engineering (SET).
    Pulvermaskin2012Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
  • 231.
    Fredriksson, Linda
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Johansson, Julia
    Halmstad University, School of Business, Engineering and Science.
    Termisk energilagring2018Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Sweden is only utilizing half of the available excess heat. To utilize more of the excess heat a seasonal thermal energy storage could be implemented to store excessed heat from the summer when the demand is lower to the winter when the demand is higher. This can be achieved by an integration of a seasonal thermal energy storage to the district heating system. A seasonal thermal energy storage may also reduce the need of the system’s peak load, which often is economically costly and adversely affect the environment. The purpose of the paper is to investigate the possibility for Skövde Värmeverk to implement a seasonal thermal storage. The paper is performed by a literature collection and calculations are made by software programs. The result shows that it is technically possible to implement a pit thermal energy storage and a borhole thermal energy storage, but no outcome shows a profitability within 20 years. A pit thermal energy storage can replace the system’s peak load up to 79 percent and a borhole thermal energy storage up to 2,8 percent. The most suitable case for Skövde Värmeverk is to install a pit thermal energy storage with a storage capacity of 4 GWh.

  • 232.
    Frishammar, Johan
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Managing Information in New Product Development: A Literature Review2005In: International Journal of Innovation and Technology Management (IJITM), ISSN 0219-8770, Vol. 2, no 3, p. 259-275Article in journal (Refereed)
    Abstract [en]

    The new product development (NPD) process is frequently described as a sequence of information processing activities, but "information in NPD" occupies a broader conceptual space than the reduction of uncertainty. This article reviews the area of "information in NPD" by examining the literature on environmental scanning, market orientation, gatekeepers, cross-functional integration, and information use. It is argued that we can understand the process of managing information in terms of three steps: Acquiring, sharing and using. A tentative framework for this area is proposed, and managerial implications resulting from this literature review and tentative frame are outlined and presented.

  • 233.
    Frishammar, Johan
    et al.
    Luleå University of Technology, Luleå, Sweden.
    Florén, Henrik
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    Research Note: What is the “fuzzy front end”, why is it important, and how can it be managed?2009In: Managing Innovation: Integrating Technological, Market and Organisational Change / [ed] Joe Tidd, John Bessant & Keith Pavitt, Hoboken: John Wiley & Sons, 2009, 4, p. 341-343Chapter in book (Other academic)
  • 234.
    Frishammar, Johan
    et al.
    Luleå University of Technology.
    Hörte, Sven Åke
    Halmstad University, School of Business and Engineering (SET), Centre for Innovation, Entrepreneurship and Learning Research (CIEL).
    The role of market orientation and entrepreneurial orientation for new product development performance in manufacturing firms2007In: Technology Analysis & Strategic Management, ISSN 0953-7325, E-ISSN 1465-3990, Vol. 19, no 6, p. 765-788Article in journal (Refereed)
    Abstract [en]

    The overall purpose of this article is to examine the relationships between two strategic orientations and performance in new product development. The first orientation considered is market orientation; the second one considered is entrepreneurial orientation, which reflects a firm's propensity to innovate, to be proactive, as well as its willingness to take risks. Drawing upon a sample of 224 mid-sized manufacturing firms, multiple regressions with and without interaction terms were used for testing seven hypotheses. The results show that a market orientation and innovativeness were positively related to performance in new product development, while proactiveness and risk taking show no such relationship. The results also show that neither product characteristics nor environmental characteristics moderate these relationships. In terms of implications, our results suggest that contradictory and to some extent paradoxical capabilities are needed to increase performance in new product development, and that the different components of an entrepreneurial orientation do not impact new product development performance equally.

  • 235.
    Fältström, Mattias
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Ferdinandsson, Mikael
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Förutsättningar för absorptionskyla: Examensarbete på Öresundskraft2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The cooling demand increases in Sweden despite the cold climate, which could cause the increase of district cooling. District cooling is a centralized cooling system with multiple benefits such as safer operations, reduced failures and removal of rumbling that will otherwise occur in local cooling systems. That’s why the absorption chiller is becoming more and more interesting to incorporate indistrict heating.The purpose of this report is to give the company Öresundskraft the technical and economic conditions for absorption cooling in Helsingborg. The main goal with the report have been to investigate: which temperature from the district heating system will be used for the absorptions chiller, how the coefficient of performance affects the conditions of absorption chiller, different dimensions for absorption chiller, different placement options for absorption chiller, if the existing cool water storage tank can be used in the future, is it profitable to invest in an absorption plant. The main goal questions have been answered through interviews, compilation and calculation of data, examination of research literature and other literature. Conclusions the authors were able to find is that the absorption chiller should be sized to 2,2 MW and it should be placed on Västhamnsverket. Under the conditions that there was access to cheap heat and only operating during the summer the result to invest in an absorption plant was profitable.

  • 236.
    Gadd, Henrik
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Achieving low return temperature from district heating substations2014In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 136, p. 59-67Article in journal (Refereed)
    Abstract [en]

    District heating systems contribute with low primary energy supply in the energy system by providing heat from heat assets like combined heat and power, waste incineration, geothermal heat, wood waste, and industrial excess heat. These heat assets would otherwise be wasted or not used. Still, there are several reasons to use these assets as efficiently as possible, i.e., ability to compete, further reduced use of primary energy resources, and less environmental impact. Low supply and return temperatures in the distribution networks are important operational factors for obtaining an efficient district heating system. In order to achieve low return temperatures, customer substations and secondary heating systems must perform without temperature faults. In future fourth generation district heating systems, lower distribution temperatures will be required. To be able to have well-performing substations and customer secondary systems, continuous commissioning will be necessary to be able to detect temperature faults without any delays. It is also of great importance to be able to have quality control of eliminated faults. Automatic meter reading systems, recently introduced into district heating systems, have paved the way for developing new methods to be used in continuous commissioning of substations. This paper presents a novel method using the temperature difference signature for temperature difference fault detection and quality assurance of eliminated faults. Annual hourly datasets from 140 substations have been analysed for temperature difference faults. From these 140 substations, 14 were identified with temperature difference appearing or eliminated during the analysed year. Nine appeared during the year, indicating an annual temperature difference fault frequency of more than 6%. © 2014 The Authors.

  • 237.
    Gadd, Henrik
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Daily heat load variations in Swedish district heating systems2013In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 106, p. 47-55Article in journal (Refereed)
    Abstract [en]

    Heat load variations in district heating systems are both seasonal and daily. Seasonal variations have mainly its origin from variations in outdoor temperature over the year. The origin of daily variations is mainly induced by social patterns due to customer social behaviours. Heat load variations cause increased costs because of increased peak heat load capacity and expensive peak fuels. Seasonal heat load variations are well-documented and analysed, but analyses of daily heat load variations are scarce. Published analyses are either case studies or models that try to predict daily heat load variations. There is a dearth of suitable assessment methods for more general analyses of existing daily load variations. In this paper, a novel assessment method for describing daily variations is presented. It is applied on district heating systems, but the method is generic and can be applied on every kind of activity where daily variations occur. The method was developed from two basic conditions: independent of system size and no use of external parameters other than of the time series analysed. The method consists of three parameters: the annual relative daily variation that is a benchmarking parameter between systems, the relative daily variation that describes the expected heat storage size to eliminate daily variations, and the relative hourly variation that describes the loading and unloading capacity to and from the heat storage. The assessment method could be used either for design purposes or for evaluation of existing storage. The method has been applied on 20 Swedish district heating systems ranging from small to large systems. The three parameters have been estimated for time series of hourly average heat loads for calendar years. The results show that the hourly heat load additions beyond the daily averages, vary between 3% and 6% of the annual volume of heat supplied to the network. Hereby, the daily variations are smaller than the seasonal variations, since the daily heat load additions, beyond the annual average heat load, are between 17% and 28% of the annual volume of heat supplied to the network. The size of short term heat storage to eliminate the daily heat load variations has been estimated to a heat volume corresponding to about 17% of the average daily heat supplied into the network. This conclusion can also be expressed as an average demand of 2.5 m3 of heat storage volume per TJ of heat supplied by assuming a water temperature difference of 40 C. The capacity for loading and unloading the storage should be equal to about half of the annual average heat load for heat supplied into the network. © 2013 Elsevier Ltd.

  • 238.
    Gadd, Henrik
    et al.
    Oresundskraft AB, S-25106 Helsingborg, Sweden..
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Fault detection in district heating substations2015In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 157, p. 51-59Article in journal (Refereed)
    Abstract [en]

    Current temperature levels in European district heating networks are still too high with respect to future conditions as customer heat demands decrease and new possible heat source options emerge. A considerable reduction of temperature levels can be accomplished by eliminating current faults in substations and customer heating systems. These faults do not receive proper attention today, because neither substations nor customer heating systems are centrally supervised. The focus of this paper has been to identify these faults by annual series of hourly meter readings obtained from automatic meter reading systems at 135 substations in two Swedish district heating systems. Based on threshold methods, various faults were identified in 74% of the substations. The identified faults were divided into three different fault groups: Unsuitable heat load pattern, low average annual temperature difference, and poor substation control. The most important conclusion from this early study of big data volumes is that automatic meter reading systems can provide proactive fault detection by continuous commissioning of district heating substations in the future. A complete reduction of current faults corresponds to approximately half the required reduction of the current temperature levels in the effort toward future low-temperature district heating networks. (C) 2015 The Authors. Published by Elsevier Ltd.

  • 239.
    Gadd, Henrik
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS).
    Heat load patterns in district heating substations2013In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 108, p. 176-183Article in journal (Refereed)
    Abstract [en]

    Future smart energy grids will require more information exchange between interfaces in the energy system. One interface where dearth of information exists is in district heating substations, being the interfaces between the distribution network and the customer building heating systems. Previously, manual meter readings were collected once or a few times a year. Today, automatic meter readings are available resulting in low cost hourly meter reading data. In a district heating system, errors and deviations in customer substations propagates through the network to the heat supply plants. In order to reduce future customer and heat supplier costs, a demand appears for smart functions identifying errors and deviations in the substations. Hereby, also a research demand appears for defining normal and abnormal heat load patterns in customer substations. The main purpose with this article is to perform an introductory analysis of several high resolution measurements in order to provide valuable information about substations for creating future applications in smart heat grids. One year of hourly heat meter readings from 141 substations in two district heating networks were analysed. The connected customer buildings were classified into five different customer categories and four typical heat load patterns were identified. Two descriptive parameters, annual relative daily variation and annual relative seasonal variation, were defined from each 1 year sequence for identifying normal and abnormal heat load patterns. The three major conclusions are associated both with the method used and the objects analysed. First, normal heat load patterns vary with applied control strategy, season, and customer category. Second, it is possible to identify obvious outliers compared to normal heat loads with the two descriptive parameters used in this initial analysis. Third, the developed method can probably be enhanced by redefining the customer categories by their indoor activities.

  • 240.
    Gadd, Henrik
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Thermal energy storage systems for district heating and cooling2015In: Advances in Thermal Energy Storage Systems: Methods and Applications / [ed] Luisa F. Cabeza, Cambridge: Woodhead Publishing Limited, 2015, 1, p. 467-478Chapter in book (Refereed)
    Abstract [en]

    The context for this chapter is the current use and typical applications of thermal energy storages within contemporary district heating and cooling systems in the Nordic countries. Examples include a new assessment method, distributed heat storages, and hourly, daily, weekly, and seasonal heat and cold storages. Specific sizes have been estimated for 209 heat storages and 9 cold storages.

  • 241.
    George, Raiju Michael
    et al.
    Halmstad University.
    Palayil Saseendran, Shyamkumar
    Halmstad University.
    Qualitative and quantitative study of existing surface parameters and their correlation to CWS parameters in Automobile Industry: Surface texture parametric study of CWS2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Surface roughness is an important parameter in the automotive Industry. This thesis is a study conducted in collaboration with QSO Interferometer systems AB (QSAB), Halmstad. The study is focused on the existing surface roughness parameters used in the automotive industry and the relationship to the CWS parameters of QISAB. The study also investigates the scope of CWS instrument developed by QISAB as a next-generation automated surface testing inline instrument. The initial study which has been conducted had 5 stages, those are the history of roughness measurement, the basic CWS parameters, the currently used surface testing instruments in the automobile industry, the use of surface metrology in the manufacturing industry and the basic principle and theory of the CWS. As the final stage to achieve the aim of the thesis a quantitative study has been conducted to compare the existing parameters with CWS parameters. The three type of comparison were done on a test piece having different range of surface roughness after different stages of grinding. These three comparisons that had been done were CWS v/s White light interferometer v/s visual inspection. The results from those quantitative analysis did support the results from the qualitative analysis.

  • 242.
    Geraldsson, Oskar
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Ylander Mikkelsen, Kristoffer
    Halmstad University, School of Business, Engineering and Science.
    Omkonstruktion och dimensionering av stålchassi till portabla bränslestationer2017Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [sv]

    Denna rapport kommer att avhandla det examensarbete som genomförts inom CAD-Teknikerprogrammet på Högskolan i Halmstad. Arbetet har genomförts på Maltes Fuel & Wash AB och startade 24:e mars 2017 med slutpresentation den 23:e maj 2017.

    Malte Fuel & Wash AB är ett företag baserat i Halmstad och tillverkar bland annat portabla bränslestationer till oljeindustrin samt bilindustrin. Den produkt som detta projekt kretsas runt är deras nyaste version av en minitank som rymmer ca 57m^3 bränsle som är en lite större variant av deras nuvarande portabla bränslestationer.

    Uppdraget från Maltes Fuel & Wash Ab var att optimera stålchassit så de väger så lite som möjligt men ska klara transporten utan några skador samt deformationer i materialet. Då det är en portabel konstruktion så måste man räkna med att den ska kunna lyftas med kran och transporteras på lastbilar då ett problem som kan uppstå är böjningar i balkarna då de är 12m långa och blir belastade ca 18 ton av resten av konstruktionen.

    För att lösa dessa problem så har uppdraget uppdelats i olika delmoment som ska lösas på olika sätt. Det har tagits fram olika 3D koncept och optimeringsberäkningar samt FEM analyser med hjälp av Catia v5. Dessa koncept har utvärderats så att de uppfyller Maltes Fuel & Wash AB’s krav och önskemål.

  • 243.
    Ghadirinejad, Nickyar
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Ottermo, Fredric
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Hoseinzade, A.
    University of Sistan and Baluchestan, Zahedan, Iran.
    Experimental Evaluation, Simulation and Statistical Analysis of a Humidification-Dehumidification Solar Desalination System2018Conference paper (Other academic)
    Abstract [en]

    Inspired by the precipitation cycle, the Humidification-Dehumidification (HDH) method is based on evaporation and consecutive condensation in a natural loop. The heat input to the system is provided by a solar collector, making the system suitable for remote locations with access to sea water and good insolation. In this study investigated parameters included temperatures and flow rates of cooling water, cycled air, and water intake to humidifier, as well as the height of packed bed column. A series of simulations has been performed in the ASPEN Plus software, in order to obtain optimum physical parameters in this desalination system. The experimental results showed that at constant heat flux and optimum air flow rate, three parameters have strong influence on the production of distilled water: the flow rate of cooling water, the flow rate of water inlet and its temperature augmentation. Moreover, although increasing flow rate of cooling water leads to an increase in the distilled water flow rate, this effect is mitigated at high rates. The most reliable Height Equivalent to a Theoretical Plate (HETP) model of random packing has been found by opting for the model of Mangers & Ponter. The estimated error of the model in predicting the height of the packed bed was less than 4%. Regarding closed versus open air flow; the closed air system provided an efficiency of distilled water production up to 15% higher than the open air system for the same conditions. This increase is a result of prevention of the loss of air humidity at the condenser outlet. A regression analysis was performed, which indicates that the HDH system can be well described by a linear model for the logarithm of the rate of desalinated water. The variables used are the saline water flow rate, the heat transfer rate in the solar collector and the air flow rate. The adjusted R-squared of the fit was computed as 89.8%.

  • 244.
    Glon, Fanny
    et al.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces. ENISE, Saint-Etienne, France.
    Flys, Olena
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces. SP Technical Research Institute of Sweden, Borås, Sweden .
    Lööf, Pär-Johan
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    3D SEM for surface topography quantification – a case study on dental surfaces2014In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 483, no 1, article id 012026Article in journal (Refereed)
    Abstract [en]

    3D analysis of surface topography is becoming a more used tool for industry and research. New ISO standards are being launched to assist in quantifying engineering surfaces. The traditional optical measuring instrumentation used for 3D surface characterization has been optical interferometers and confocal based instrumentation. However, the resolution here is limited in the lateral dimension to the wavelength of visible light to about 500 nm. The great advantage using the SEM for topography measurements is the high flexibility to zoom from low magnifications and locating interesting areas to high magnification of down to nanometer large surface features within seconds. This paper presents surface characterization of dental implant micro topography. 3D topography data was created from SEM images using commercial photogrammetric software. A coherence scanning interferometer was used for reference measurements to compare with the 3D SEM measurements on relocated areas. As a result of this study, measurements emphasizes that the correlation between the accepted CSI measurements and the new technology represented by photogrammetry based on SEM images for many areal characterization parameters are around or less than 20%. The importance of selecting sampling and parameter sensitivity to varying sampling is high-lighted. Future work includes a broader study of limitations of the photogrammetry technique on certified micro-geometries and more application surfaces at different scales. © Published under licence by IOP Publishing Ltd.

  • 245. Glöersen, Erik
    et al.
    Johnsson, Pehr-Erik
    Hyberger, Joacim
    Biogas på Wapnö: Analys av framtida energisystem2012Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
    Abstract [en]

    Considering that the price and demand for energy gradually has risen over the past decade and a wider discussion about the human impact on the environment has become increasingly more important and given a clearer role in modern society. This has contributed to increased incentives to reduce the use of fossil fuels and increase the use of renewable energy.The agriculture currently accounts for 20 % of Sweden's total greenhouse gas emissions. A way for an agricultural company like Wapnö AB to reduce their emissions could be to utilize existing renewable energy sources within their own premises.The report's aim is to create an energy audit of Wapnö’s existing energy system and how it changes with a future biogas plant in operation. The energy audit is used to illustrate how the company’s climate footprint could change. The report also investigates the economics of different heating options for the biogas process and the completion of the current refrigeration compressors with a heat-driven chiller, all to increase the usage of the waste heat from the cogeneration, and minimize the need of purchased energy.The results show that Wapnö can reduce their carbon emissions with 5600 tons of carbon dioxide per year with a future biogas plant in operation. The results also show that the waste heat, combined with a heat pump, is the most cost efficient way to heat the biogas process. Furthermore, the report also shows that the investment in an absorption chiller will be refunded within approximately 6 years, and that in a comparison of the reduced climate impact of either cogeneration or production of vehicle gas, at Wapnö, cogeneration provides a slightly larger reduction of greenhouse gas emissions.

  • 246.
    Gobczyński, Karol
    et al.
    Halmstad University, School of Business and Engineering (SET).
    Leroux, Maxime
    Halmstad University, School of Business and Engineering (SET).
    Socio-economic factors influencing the electric vehicle buying process in Iceland2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this research is the analysis of socio-economic factors that wouldinfluence consumer buying process of electric vehicles in Iceland. The purpose of the researchis to detect the most crucial factors influencing Icelanders decisions for and againstpurchasing an electric vehicle, instead of car with internal combustion engine. This researchverified people‟s opinions and can bring companies closer to real mindsets of Icelandicpotential buyers. Moreover, this paper might give a possibility to eliminate wrong thinkingand barriers by better adjusted marketing. Additionally, analyzed advantages might showwhat the main reason of shifting to this alternative technology is. Moreover, it shows whatmight be the customer acceptance price range.

  • 247.
    Gogia, Hardik
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Shirsat, Amit
    Halmstad University, School of Business, Engineering and Science.
    An empirical investigation of How does ISO 9001 standards affect innovation and creativity2019Independent thesis Advanced level (degree of Master (One Year)), 15 credits / 22,5 HE creditsStudent thesis
  • 248.
    Gomez, Fabrizio
    Halmstad University, School of Business, Engineering and Science.
    Optimization of a grid connected residential battery storage system in Sweden: Home Energy Management System Approach2018Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The market for energy production has experienced relevant changes to reach more sustainable characteristics, during the last two decades. In this context, residential photovoltaic (PV) system has gained popularity as a practical and profitable alternative to complement the electric supply from the grid. In the same line, the seasonal and variable nature of PV supply generates an interest in BESS-battery energy storage systems.The aim with this thesis is to investigate HEMS-home energy management system for a residential electricity production using PV and storage in Sweden. HEMS allows residential customer and producer to sell or buy energy to minimize the final electricity bill. The capacityof BESS and the scheduling are optimized by using a proposed algorithm. Results gained indicate that factors such as household electricity demand and allocation during the day, electricity price, and tariff scheme are the critical variables to consider in the design of the BESS system. Optimal battery capacities obtained are within the range of available battery market stock-sizes. However, several of the standard battery capacities of the leading manufacturers are oversized for this case. For Swedish context, a BESS installation cost below 270 €/kWh generates saving on the annual electricity bill of having BESS in comparison with not using BESS. In addition, the daily charge of EV, electric vehicle, was studied to see if a higher demand for household electricity could generate an optimal capacity and higher savings.

  • 249.
    Gong, Mei
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Wall, Göran
    Öxbo, Lerum, Sverige.
    Exergy Analysis of the Supply of Energy and Material Resources in the Swedish Society2016In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 9, no 9, article id 707Article in journal (Refereed)
    Abstract [en]

    Exergy is applied to the Swedish energy supply system for the period 1970–2013. Exergy flow diagrams for the systems of electricity and district heating as well as for the total supply system of energy and material resources for 2012 are presented. The share of renewable use has increased in both electricity and district heat production. The resource use is discussed in four sectors: residential and service, transportation, industry and agriculture. The resource use is also analyzed with respect to exergy efficiency and renewable share. The total exergy input of energy and material resources amounts to about 2700 PJ of which about 530 PJ was used for final consumption in 2012. The results are also compared with similar studies. Even though the share of renewable resource use has increased from 42% in 1980 to 47% in 2012, poor efficiency is still occurring in transportation, space heating, and food production. A strong dependence on fossil and nuclear fuels also implies a serious lack of sustainability. A more exergy efficient technology and a higher renewable energy share are needed in order to become a more sustainable society.

  • 250.
    Gong, Mei
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Wall, Göran
    Öxbo gård, Härryda, Sweden.
    Life Cycle Exergy Analysis of Solar Energy Systems2014In: Journal of Fundamentals of Renewable Energy and Applications, ISSN 2090-4533, E-ISSN 2090-4541, Vol. 5, no 1, article id 1000146Article in journal (Refereed)
    Abstract [en]

    Exergy concepts and exergy based methods are applied to energy systems to evaluate their level of sustainability. Life Cycle Exergy Analysis (LCEA) is a method that combines LCA with exergy, and it is applied to solar energy systems. It offers an excellent visualization of the exergy flows involved over the complete life cycle of a product or service. The energy and exergy used in production, operation and destruction must be paid back during life time in order to besustainable. The exergy of the material that is being engaged by the system will turn up as a product and available for recycling in the destruction stage. LCEA shows that solar thermal plants have much longer exergy payback time than energy payback time, 15.4 and 3.5 years respectively. Energy based analysis may lead to false assumptions in the evaluation of the sustainability of renewable energy systems. This concludes that LCEA is an effective tool for the design and evaluation of solar energy systems in order to be more sustainable.

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