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  • 251.
    Fredh, Daniel
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Stolt, Jesper
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Pulvermaskin2012Independent thesis Basic level (university diploma), 5 poäng / 7,5 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 252.
    Fredriksson, Linda
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Johansson, Julia
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Termisk energilagring2018Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    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.

    Fulltekst (pdf)
    fulltext
  • 253.
    Frishammar, Johan
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Centrum för innovations-, entreprenörskaps- och lärandeforskning (CIEL).
    Managing Information in New Product Development: A Literature Review2005Inngår i: International Journal of Innovation and Technology Management (IJITM), ISSN 0219-8770, Vol. 2, nr 3, s. 259-275Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 254.
    Frishammar, Johan
    et al.
    Luleå University of Technology, Luleå, Sweden.
    Florén, Henrik
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Centrum för innovations-, entreprenörskaps- och lärandeforskning (CIEL).
    Research Note: What is the “fuzzy front end”, why is it important, and how can it be managed?2009Inngår i: Managing Innovation: Integrating Technological, Market and Organisational Change / [ed] Joe Tidd, John Bessant & Keith Pavitt, Hoboken: John Wiley & Sons, 2009, 4, s. 341-343Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 255.
    Frishammar, Johan
    et al.
    Luleå University of Technology.
    Hörte, Sven Åke
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Centrum för innovations-, entreprenörskaps- och lärandeforskning (CIEL).
    The role of market orientation and entrepreneurial orientation for new product development performance in manufacturing firms2007Inngår i: Technology Analysis & Strategic Management, ISSN 0953-7325, E-ISSN 1465-3990, Vol. 19, nr 6, s. 765-788Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 256.
    Fältström, Mattias
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Energiteknik.
    Ferdinandsson, Mikael
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Energiteknik.
    Förutsättningar för absorptionskyla: Examensarbete på Öresundskraft2014Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Efterfrågan av kyla ökar i Sverige trots det kalla klimatet vilket då medför att behovet av fjärrkyla kan öka. Fjärrkyla är en centraliserad kylproduktion med fördelar som säkrare drift, minskade haverier samt att buller avlägsnas i jämförelse med lokala kylanläggningar. Således är absorptionskyla ett alternativ till fjärrkyla som börjar bli mer och mer intressant för fjärrvärmeintegrering. Syftet med rapporten är att ge företaget Öresundskraft ett underlag över de tekniska och ekonomiska förutsättningarna för absorptionskyla i Helsingborg. Problemställningarna har varit att undersöka: temperaturen på fjärrvärmen som ska användas till absorptionsanläggningen, hur absorptionsmaskinens kylfaktor påverkar förutsättningarna, hur absorptionsanläggningen ska dimensioneras, utreda olika placeringsalternativ för absorptionsanläggningen, om den befintliga ackumulatortanken kan användas i framtiden och om det är lönsamt att investera i en absorptionsanläggning. Problemställningarna besvarades genom intervjuer, sammanställning och beräkning av data, granskning av forskningslitteratur samt annan litteratur. Slutsatser som författarna har kommit fram till är att absorptionsmaskinen ska dimensioneras till 2,2 MW och att den ska placeras på Västhamnsverket. Under de förutsättningar att det fanns tillgång till billig värme samt att driften endast sker på sommaren fick resultatet ett utfall som gav lönsamhet i en absorptionsanläggning.

    Fulltekst (pdf)
    Förutsättningar för absorptionskyla - Examensarbete på Öresundskraft
  • 257.
    Gadd, Henrik
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Achieving low return temperature from district heating substations2014Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 136, s. 59-67Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 258.
    Gadd, Henrik
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Daily Heat Load Variation in Swedish District Heating Systems2010Inngår i: 12th International Symposium on District Heating and Cooling, Tallinn: Tallinn University of Technology , 2010, s. 199-201Konferansepaper (Fagfellevurdert)
    Abstract [en]

    If daily heat load variations could be eliminated in district heating-systems, it would make the operation of the district heating system less costly and more competitive . There would be several advantages in the operation such as:

    • Less use of expensive peak load power where often expensive fuels are used.
    • Less need for peak load power capacity.
    • Easier to optimize the operation that leads to higher conversion efficiencies.
    • Less need for maintenance because of more smooth operation of the plants

    There are a number of ways to handle the daily variations of the heat load. Two often used are large heat storages or using the district heating network as temporary storage. If it would be possible to centrally control the customer substations, it would also be possible to use heavy buildings connected to the district heating system as heat storages.

    To be able to find the best way to reduce or even eliminate the daily heat load variations, you need to understand the characteristics of the daily variations. This paper will describe a way of characterizing daily heat load variations in some Swedish district heating-systems.

    Fulltekst (pdf)
    FULLTEXT01
  • 259.
    Gadd, Henrik
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS).
    Daily heat load variations in Swedish district heating systems2013Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 106, s. 47-55Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 260.
    Gadd, Henrik
    et al.
    Oresundskraft AB, Helsingborg, Sweden.
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
    Fault detection in district heating substations2015Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 157, s. 51-59Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 261.
    Gadd, Henrik
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS).
    Heat load patterns in district heating substations2013Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 108, s. 176-183Artikkel i tidsskrift (Fagfellevurdert)
    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.

  • 262.
    Gadd, Henrik
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energivetenskap.
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energivetenskap.
    Thermal energy storage systems for district heating and cooling2015Inngår i: Advances in Thermal Energy Storage Systems: Methods and Applications / [ed] Luisa F. Cabeza, Cambridge: Woodhead Publishing Limited, 2015, 1, s. 467-478Kapittel i bok, del av antologi (Fagfellevurdert)
    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.

  • 263.
    George, Raiju Michael
    et al.
    Högskolan i Halmstad.
    Palayil Saseendran, Shyamkumar
    Högskolan i Halmstad.
    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 poäng / 15 hpOppgave
    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.

    Fulltekst (pdf)
    fulltext
  • 264.
    Geraldsson, Oskar
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Ylander Mikkelsen, Kristoffer
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Omkonstruktion och dimensionering av stålchassi till portabla bränslestationer2017Independent thesis Basic level (university diploma), 5 poäng / 7,5 hpOppgave
    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.

    Fulltekst (pdf)
    fulltext
  • 265.
    Ghadirinejad, Nickyar
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Ottermo, Fredric
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
    Hoseinzade, A.
    University of Sistan and Baluchestan, Zahedan, Iran.
    Experimental Evaluation, Simulation and Statistical Analysis of a Humidification-Dehumidification Solar Desalination System2018Konferansepaper (Annet vitenskapelig)
    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%.

  • 266.
    Glon, Fanny
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Maskinteknisk produktframtagning (MTEK), Funktionella ytor. ENISE, Saint-Etienne, France.
    Flys, Olena
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Maskinteknisk produktframtagning (MTEK), Funktionella ytor. SP Technical Research Institute of Sweden, Borås, Sweden .
    Lööf, Pär-Johan
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Maskinteknisk produktframtagning (MTEK), Funktionella ytor.
    Rosén, Bengt-Göran
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Maskinteknisk produktframtagning (MTEK), Funktionella ytor.
    3D SEM for surface topography quantification – a case study on dental surfaces2014Inngår i: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 483, nr 1, artikkel-id 012026Artikkel i tidsskrift (Fagfellevurdert)
    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.

    Fulltekst (pdf)
    fulltext
  • 267. Glöersen, Erik
    et al.
    Johnsson, Pehr-Erik
    Hyberger, Joacim
    Biogas på Wapnö: Analys av framtida energisystem2012Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    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.

    Fulltekst (pdf)
    fulltext
  • 268.
    Gobczyński, Karol
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Leroux, Maxime
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Socio-economic factors influencing the electric vehicle buying process in Iceland2011Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    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.

    Fulltekst (pdf)
    EV in Iceland
  • 269.
    Gogia, Hardik
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Shirsat, Amit
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    An empirical investigation of How does ISO 9001 standards affect innovation and creativity2019Independent thesis Advanced level (degree of Master (One Year)), 15 poäng / 22,5 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 270.
    Gomez, Fabrizio
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    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 poäng / 15 hpOppgave
    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.

    Fulltekst (pdf)
    fulltext
  • 271.
    Gong, Mei
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energivetenskap.
    Wall, Göran
    Öxbo, Lerum, Sverige.
    Exergy Analysis of the Supply of Energy and Material Resources in the Swedish Society2016Inngår i: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 9, nr 9, artikkel-id 707Artikkel i tidsskrift (Fagfellevurdert)
    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.

    Fulltekst (pdf)
    fulltext
  • 272.
    Gong, Mei
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Wall, Göran
    Öxbo gård, Härryda, Sweden.
    Life Cycle Exergy Analysis of Solar Energy Systems2014Inngår i: Journal of Fundamentals of Renewable Energy and Applications, ISSN 2090-4533, E-ISSN 2090-4541, Vol. 5, nr 1, artikkel-id 1000146Artikkel i tidsskrift (Fagfellevurdert)
    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.

    Fulltekst (pdf)
    fulltext
  • 273.
    Gong, Mei
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Wall, Göran
    Chalmers University of Technology, Gothenburg, Sweden.
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Bio- och miljösystemforskning (BLESS), Energiteknik.
    Energy and Exergy Analysis of District Heating Systems2012Inngår i: 13th International Symposium on District Heating and Cooling: 3rd of September – 4th of September: Copenhagen, Denmark, 2012, s. 55-60Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The concept of exergy is defined and applied to district heating systems. The influence from different reference state conditions and system boundaries are explained in some detail. The aim is to show the simplicity and value of using the concept of exergy when analyzing district heating processes. The exergy factor is introduced and applied for a number of Swedish and Danish district heating systems. This varies from 14.2% to 22.5% for Swedish district heating systems. The higher the exergy factor, the more the exergy losses in the passive conversion towards space heating. Large losses revealed in an exergy treatment of a process should be seen as a challenge to achieve technical improvements of the system.

    Fulltekst (pdf)
    DH Exergy
  • 274.
    Gong, Mei
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
    Enhanced Biomass CHP plants for district heating systems2019Inngår i: Book of abstracts: 5th International Conference on Smart Energy Systems in Copenhagen, on 10-11 September 2019 / [ed] Henrik Lund, Brian Vad Mathiesen & Poul Alberg Østergaard, Aalborg: Aalborg Universitetsforlag, 2019, s. 239-239Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In Sweden, located in North Europa, more than half of the total heat demand in buildings is met by district heating, but only just above one-third of the heat supply comes from Combined Heat and Power. In this paper, a new enhancement of biomass CHP plant is explored. The modification is that a large absorption heat pump is used for the heat supply to the district heating network. This new solution has so far never been implemented outside China. The benefits will be more electricity from lower condenser pressure and more heat obtained from flue gas condensation. The drawback is that the absorption heat pump will require extracted steam that will decrease electricity generation. In order to estimate the offset between the two benefits and the drawback, a simplified model has been developed to study a typical Swedish biomass CHP plant located in Lund. This enhancement could be part of the transition from third generation district heating (3GDH) to fourth generation district heating system (4GDH) by introducing efficient heat supply plants in current systems with high distribution temperatures. Several cases studied concerning both 3GDH and 4GDH have been compared to reference cases. The results show that the enhancement is a possible way to prepare for future 4GDH. Further investigations are recommended concerning pre-investment in absorption heat pumps as a transition strategy for new CHP plants originally designed for return temperatures of 20-30 ºC.

  • 275.
    Gong, Mei
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
    Werner, Sven
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, Rydberglaboratoriet för tillämpad naturvetenskap (RLAS).
    New system solution for biomass CHP plant2019Rapport (Annet vitenskapelig)
    Abstract [en]

    The main propose with this pre-study was to assess a new Chinese concept concerning Combined Heat and Power (CHP) plants for typical Swedish conditions with biomass as fuel. The new enhancement is to use a large absorption heat pump for the final heat supply instead of the turbine condenser. More heat can then be recovered from the three units that will deliver the heat (the flue gas condenser, the turbine condenser and the absorption heat pump). So far, this new CHP solution has never been implemented outside China. For this pre-study, the simulation model was elaborated on design data from the Örtofta biomass CHP plant outside Lund. The results show that Chinese concept will provide the higher conversion efficiency, but with lower power-to-heat ratio. The main benefit is that more heat can be recycled from the flue gas condenser. The payback time of installing absorption heat pump is always over eight years within expected intervals for alternative costs for electricity and heat. The Chinese concept is less suitable for the Swedish context with biomass backpressure CHP plants, since the proportion of lost electricity becomes rather high. The Chinese context with utilization of existing condensation turbines is still interesting, since condenser heat can be recycled without major modification of existing turbines.

  • 276.
    Gong, Mei
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Energiteknik.
    Werner, Sven
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Energiteknik.
    On district heating and cooling research in China2014Inngår i: Proceedings from the 14th International Symposium on District Heating and Cooling: September, 6-10, 2014: Stockholm, Sweden, Stockholm: Swedish District Heating Association , 2014, s. 325-332Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The growth of the Chinese district heating sector has been very rapid during recent years. No other country in the world can show the same rapid growth of district heating systems during the last decades. Heated building area increased six times between 1995 and 2008 according to the Chinese district heating statistics. China has also enjoyed strong growth of scientific articles and papers published about district heating in recent years. During 2010-2012, one third of all international scientific journal articles and conference papers about district heating came from Chinese scientists, while Swedish researchers accounted for one quarter. It is important to identify the Chinese district heating and cooling research to judge the potential for future collaborative research on district heating systems between Sweden/Europe and China. Until 2013, Chinese district heating and cooling scientists have published 205 international publications on district heating and 36 publications on district cooling. In this paper, these articles are mapped and summarised with respect to topics, active research institutions, and their technology focuses. Another approach is to grasp the Chinese interest for more diversified heat supply, since many new systems are established and thereby have more degrees of freedom when choosing by various heat supply and technology options.

    Download (pdf)
    On DHC in China
  • 277.
    Gonzalez, Victoria
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Ruiz Castro, Pamela
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Evaluation of a human-robot collaboration in an industrial workstation2018Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    The fast changes in the industry require improved production workstations which ensure the workers' safety and improve the efficiency of the production. Technology developments and revised legislation have increased the possibility of using collaborative robots. This allows for new types of industry workstations where robots and humans cooperate in performing tasks. In addition to safety, the design of collaborative workstations needs to consider the areas of ergonomics and task allocation to ensure appropriate work conditions for the operators, while providing overall system efficiency. By facilitating the design development process of such workstations, the use of software simulations can help in gaining quality, save time and money by supporting decision making and testing concepts before creating a physical workstation, in turn, aimed to lead to better final solutions and a faster process of implementation or reconfiguration. The aim of this study is to investigate the possibility of having a human-robot collaboration in a workstation that is based on a use-case from the industry. The concept designs will be simulated and verified through a physical prototype, with which ergonomic analysis, time analysis, and risk assessments will be compared to validate the resultant collaborative workstation.

    Fulltekst (pdf)
    fulltext
  • 278.
    Gopathi, Pranay
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap. Miljöbron Skåne.
    Surve, Pratik
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap. Miljöbron Skåne.
    Possibilities and Limitations of using Production Waste PET and PES materials in Additive Manufacturing (3D Printing Technology)2017Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 279.
    Goulas, A.
    et al.
    Loughborough University, Loughborough, United Kingdom.
    Friel, R. J.
    Loughborough University, Loughborough, United Kingdom.
    Laser sintering of ceramic materials for aeronautical and astronautical applications2017Inngår i: Laser Additive Manufacturing: Materials, Design, Technologies, and Applications / [ed] Milan Brandt, Amsterdam: Woodhead Publishing Limited, 2017, s. 373-398Kapittel i bok, del av antologi (Annet vitenskapelig)
    Abstract [en]

    Ceramic products have been manufactured for many decades via conventional techniques such as extrusion, oven sintering, and casting. However, these methods have several inherent disadvantages with regard to the possible shape and structure, which limits their application range. The advent of laser additive manufacturing (LAM) is a key enabler in creating ceramic components with considerably greater design freedom. The technology is allowing the creation of ceramic components that not only meet the increasing material requirements of aero/astro applications but also provide new opportunities in terms of the complex structures that can now be produced. Ceramics represents a new frontier for these LAM systems – one with many challenges and research needs; however, the material properties that ceramics offer over polymers and metals make the additive manufacturing of ceramic components an enticing engineering opportunity for aerospace, astronautical and potentially many other technology areas. This chapter presents an overview of the state of the art of ceramic materials in LAM for aerospace and astronautic applications. Section 14.2 explains the fundamentals of ceramic materials and includes examples of their traditional manufacturing methods. Section 14.3 focuses on the application of ceramic materials to the challenging engineering realm of aeronautics and astronautics, accompanied by examples from their main application areas (eg, thermal and ballistic shielding). Section 14.4 goes into depth on LAM, explaining the challenges and implications of laser processing ceramics, the benefits of the approach and examples from the current state of the art. Finally, 14.5 Future developments, 14.6 Conclusions highlight some of the likely future developments in the area and conclude the chapter. © 2017 Elsevier Ltd. All rights reserved.

  • 280.
    Goulas, Athanasios
    et al.
    Wolfson School of Mechanical, Electrical & Manufacturing Engineering, Loughborough University, Loughborough, United Kingdom.
    Binner, Jon GP
    College of Engineering and Physical Sciences, University of Birmingham, Birmingham, United Kingdom.
    Engstrøm, Daniel S.
    Wolfson School of Mechanical, Electrical & Manufacturing Engineering, Loughborough University, Loughborough, United Kingdom.
    Harris, Russell A.
    Mechanical Engineering, University of Leeds, Leeds, United Kingdom.
    Friel, Ross J.
    MAX IV Laboratory, Lund University, Lund, Sweden.
    Mechanical behaviour of additively manufactured lunar regolith simulant components2019Inngår i: Proceedings of the Institution of mechanical engineers. Part L, journal of materials, ISSN 1464-4207, E-ISSN 2041-3076, Vol. 233, nr 8, s. 1629-1644Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Additive manufacturing and its related techniques have frequently been put forward as a promising candidate for planetary in-situ manufacturing, from building life-sustaining habitats on the Moon to fabricating various replacements parts, aiming to support future extra-terrestrial human activity. This paper investigates the mechanical behaviour of lunar regolith simulant material components, which is a potential future space engineering material, manufactured by a laser-based powder bed fusion additive manufacturing system. The influence of laser energy input during processing was associated with the evolution of component porosity, measured via optical and scanning electron microscopy in combination with gas expansion pycnometry. The compressive strength performance and Vickers micro-hardness of the components were analysed and related back to the processing history and resultant microstructure of the lunar regolith simulant build material. Fabricated structures exhibited a relative porosity of 44–49% and densities ranging from 1.76 to 2.3 g cm−3, with a maximum compressive strength of 4.2 ± 0.1 MPa and elastic modulus of 287.3 ± 6.6 MPa, the former is comparable to a typical masonry clay brick (3.5 MPa). The additive manufacturing parts also had an average hardness value of 657 ± 14 HV0.05/15, better than borosilicate glass (580 HV). This study has shed significant insight into realising the potential of a laser-based powder bed fusion additive manufacturing process to deliver functional engineering assets via in-situ and abundant material sources that can be potentially used for future engineering applications in aerospace and astronautics. © 2018, IMechE 2018.

    Fulltekst (pdf)
    fulltext
  • 281.
    Grandicki, Andreas
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Bearbetningsmaskin för fälgar i kolfiberkomposit2015Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Detta examensarbete har utförts på uppdrag av Koenigsegg Automotive AB, som utvecklar, tillverkar och säljer högpresterande sportbilar. Företaget erbjuder fälgar tillverkade helt i kolfiberkomposit, som ger betydande viktbesparingar i jämförelse med traditionella metallfälgar.

    Efter tillverkningen kräver fälgarna viss bearbetning vid anläggningsytan mellan fälg och däck. Syftet med examensarbetet har varit att undersöka möjligheten att utföra bearbetningen av fälgarna in-house i Ängelholm, och målet har varit att konstruera en maskin för detta ändamål.

    Projektet inleddes med en litteratursökning, där svårigheter och möjligheter gällande bearbetning av kolfiberkompositer undersöktes. Till följd av de undersökningar som gjordes, valdes bearbetningsmetoden svarvfräsning och ett antal konstuktionskoncept genererades. Genom ett antal utvärderingar utvecklades ett speciellt koncept vidare till ett komplett produktförslag.

    Produktförslaget är komplett med analyser, beräkningar samt tillverkningsunderlag, som ger uppdragsgivaren bättre insikt i sina möjligheter. Även underlag som tillåter en framtida CE-märkning har tagits fram. Projektet har följt Fredy Olssons konstruktionsmetod.

    Fulltekst (pdf)
    fulltext
  • 282.
    Graneskog, Axel
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Energiteknik.
    Gustafsson, Yngve
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Energiteknik.
    Smart Control: En reaktion på EU:s ekodesignkrav2012Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    Abstract [en]

    The purpose of this thesis is to assist the Swedish energy company NIBE Energy Systems in their studies of adaptive regulation applicable to electrical water heaters. Due to coming energy classifications of these appliances in the European Union, NIBE Energy Systems needs to use adaptive regulation, called Smart Control, to keep their products in the best possible energy class and remain competitive to the market. By using this Smart Control regulation a 2-3 % improve-ment of efficiency can be credited the system. This is a small number, but heavily needed, since the energy classes are based on the idea that the European Union is provided with electricity from coal condensate power resulting in a 40 % maximum efficiency. Furthermore, doing noth-ing will result in some water heaters not being approved to use on the market from 2015 due to low efficiency. The thesis is made out of three sections; product-/literature studies of products already commercially available using similar principles, data analysis on existing Smart Controlled water heater and recommendations to the company for future development of their own system. Limitations have been made through simplified calculations and thermodynamic assumptions. A conclusion can still be made from the thesis; electrical water heaters using Smart Control saves 10 - 15 % of electrical energy use today in a real world environment. Main sources to this thesis have been data analysis, Internet, brochures and conversations with the mentors.

    Fulltekst (pdf)
    fulltext
  • 283.
    Gregorovic, Antonia
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Maskinteknisk produktframtagning (MTEK).
    Anikina, Elizaveta
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Maskinteknisk produktframtagning (MTEK).
    Konstruktion av lapputmatningsmaskin2014Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    The vision of this thesis was to create a concept that can be used as a base for amachine construction. The purpose of this project was to use different methods todevelop a concept that on the best way meets the sat up requirements. This projecthas been divided into three stages/parts; principle, primary and the final solutionstage.This thesis has been conducted in collaboration with Västkustägg AB. It is aconstruction project designed to construct a machine that will automatically putlabels on the egg packages. Västkust AB wanted to automate this process. Thecompany has only tested this process earlier by an operator who did this jobmanually.We came up with different solution during this project. The assessments of theseconcepts were made after Olsson's (1995) method and together with Terje Olsson- our supervisor at the company, later during the project. During the last stage ofthis project we chose to go with one final concept for a further developing. Alldemands made by the company were followed throughout the working process.We managed to develop a machine containing few and simple components, whichat the same time are very functional for its purpose. The design of our machine isdifferent from other industrial machines and labeling machines which makes itunique in its own way. This machine is meant for labels of two standard types ofpaper A5 and A6.The calculations we made during this project have been done in Catia V5 and hasbeen verified. We had a clear image of how our ideas should be in the beginningof this project and we knew how we wanted them to be we used our own theoriesand approaches in practice. Our theories and ideas showed in our sketches andprototypes. This along with other methods led to our final concept.We had also built some prototypes to be able to see if our ideas work in practice.The prototype led to some changes in our concepts. It gave us experience inprototype creating, functionality of the ideas and other areas.

    Fulltekst (pdf)
    fulltext
  • 284.
    Grimslätt, Tove
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Freiholtz, Sofia
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    SMAX: Smart clothing racks2018Independent thesis Basic level (degree of Bachelor), 180 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 285.
    Grip, Andreas
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Kraftmätning på cykelpedal2018Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    This report will describe the development of a subsystem for force measurement on bicycle pedals. The force is going to be used as a control parameter in a motor controller to control an electric motor on an electric bicycle. The report focuses on force measurement and will not process any control system. There has also been a survey of alternative power supplies to the circuit boards to be used in this project. Energy Harvesting has been investigated as an alternative source. The aim of the project is to measure the force applied on the pedal in a good way for use in a control system.This work resulted in that the force applied on the pedals was measured on the crank arms. The force was being measured by strain gauge sensors in a test rig designed in this project. The force signal can be used in the intended control system. This report has explained when, during a pedal stroke, the force should be measured. Processing of the signal will be done furthermore in the motor controller to fit the requirements set by the control system.

    Fulltekst (pdf)
    fulltext
  • 286.
    Grouleff Öberg, Simon
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    KNOXHULT: Utveckling av IKEAs nya lågpris kök för Nordamerika2016Independent thesis Basic level (university diploma), 5 poäng / 7,5 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 287. Gunnarsson, Love
    et al.
    Ljungström, Anton
    Rescue ladder2014Independent thesis Basic level (professional degree), 15 poäng / 22,5 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 288.
    Gustafsson, Per
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Wisjö, Jari
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Vad påverkar mognadsgraden inför en implementering av SMED2014Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Till följd av globalisering och en växande konkurrens ställs det i dag allt större krav på organisationer. För att möta den hårdnande konkurrensen är det vanligt att företag implementerar olika kvalitetsprogram. Dessa förändringar ses som nödvändiga åtgärder för att kunna bibehålla marknadsandelar och vara konkurrenskraftiga. Genom att införa Lean-verktyg och arbeta med ständiga förbättringar minskar riskerna för att produktionen läggs ned eller flyttas till lågkostnadsländer.

    Som examensarbete har författarna valt att studera ett av dessa Lean-verktyg som används för ställtidsreducering. Verktyget benämns SMED och står för ”Single Minute Exchange of Die” vilket syftar till att öka maskintillgängligheten genom effektivare verktygsbyte mellan olika produkter. Examensarbetet är en kvalitativ fallstudie där författarna går på djupet för att skapa en förståelse över det som kan komma att påverka utfallet. Nyckelfrågan som författarna söker svar på är: Vad som påverkar mognadsgraden inför en implementering av SMED?

    Empiri har samlats in genom intervjuer och observationer för att besvara ovanstående problemformulering. Med stöd från TQM (Total Quality Management) har författarna valt att undersöka fyra områden och hur dessa korrelerar mot utfallet. De valda områdena benämns i denna studie som block och är: implementering, företagskultur, kompetens och ledarskap. Själva korrelationen utfördes med hjälp av en regressionsanalys i statistikprogrammet Minitab, där resultatet visar på att de fyra blocken påverkar, men har olika inverkan på utfallet. Blocken som påverkar mest är ledningen och företagskulturen som svarar för totalt 84 %. Ett resultat som enligt författarna uppfyllde undersökningens förväntningar och som kunde bekräftades genom denna studie.

    Författarna anser att studien kan tillföra användbar information och kunskap inför implementeringen av SMED, då detta examensarbete innefattar intervjuer och observationer från tio företag.

    Fulltekst (pdf)
    Fallstudie SMED
  • 289.
    Gustavsson, Julia
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Albertsson, Klara
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    CASEUS: Din hjälpande hand2017Independent thesis Basic level (university diploma), 15 poäng / 22,5 hpOppgave
    Abstract [en]

    Development and modernization takes place all the time and everywhere in today's society.

    Although we handle and slices hard cheese in the same way that we did decades ago. The way

    we handle cheese nowadays is not only unhealthy, but can also be a difficult moment for

    some people.

    The goals to develop a functional, modern and food-approved kitchen tool adapted to today’s

    society are the main factors for this bachelor thesis. Along with stakeholders for the project,

    the requests and demands set up for the prototype progressively have been worked out. Wellknown

    methods and market surveys have been used to ensure the need of the product.

    Researches in relevant subjects have also shown that the market is in need of a new product.

    The product called CASEUS has after studies shown to have a broad target group. The name

    CASEUS, came from the Latin word for cheese (Caseus) and from the English word case, as

    the product will be like a case around the cheese. The kitchen tool is designed with a simple

    mechanical solution, in a hygienic material. The handle is designed according to EU: s

    standard dimensions for handles. Therefore, it is considered suitable for the majority of the

    population in Sweden. Thus, there is a market for the product both at hotels and restaurants, as

    well as in private households.

    In the final stage of the project a prototype of CASEUS has been produced by Havd Group,

    which is a stakeholder in the project. The prototype has been funded by a scholarship and

    contributions from ALMI Business partner.

    To be able to continue with CASEUS after the end of the project, new possible working paths

    have been investigated. With promotion, more scholarship or a collaboration with an existing

    manufacturer in the industry, the project team hopes to be able to get CASEUS out on the

    market.

    Fulltekst (pdf)
    fulltext
  • 290.
    Gustavsson, Martin
    et al.
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Frimodig, Viktor
    Högskolan i Halmstad, Akademin för informationsteknologi.
    Virtual Prototyping and Physical Validation of an Inverted Pendulum: "Sea-Calf Bot"2015Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    The work is motivated by the goal of linking reality and model, and to see if there is an opportunity to develop an inexpensive educational tool for training in cyber-physical systems.

    This project has investigated the possibilities to build a cheap inverted pendulum with controller and connect this with the modeling language Acumen. Acumen models is used for comparison with the actual prototype.

    To solve these problems has a 3D printer been used to create hardware, Arduino UNO for control and Raspberry Pi for enable communication with Acumen over WLAN.

    The result was a cheap inverted pendulum, which can be built for a cost around 750 SEK. Graphs created in Acumen and from data collected from sensors can be analyzed.

    With a model of the inverted pendulum system, the results show that Acumen can be used in the development of cyber-physical systems. There are differences between model and reality but also similarities.

    Fulltekst (pdf)
    fulltext
  • 291. Gutestam, Kim
    et al.
    Magnusson, Mattias
    Coymo2014Independent thesis Basic level (professional degree), 15 poäng / 22,5 hpOppgave
    Fulltekst (pdf)
    Coymo
  • 292. Halili, Jonas
    et al.
    Kurtti, Oskar
    FlowGoLow – Energieffektivisering för hemmet2013Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    Fulltekst (pdf)
    FlowGoLow
  • 293. Hallström, Sofia
    et al.
    Albderi, Safa
    Sladdfri laddningsstation för elbilar: Uppdragsgivare: Elonroad AB2017Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 294. Halvarsson, Erik
    et al.
    Norrman, Marcus
    Bluetooth-styrning av skytteställ2016Independent thesis Basic level (university diploma), 10 poäng / 15 hpOppgave
    Abstract [en]

    Today many shooting ranges uses outdated systems for controlling their shooting targets. These systems may be inconvenient to both use and to program. During this project a new system for controlling shooting targets is developed, togheter with a rotation target prototype for air pistol shooting.

    The project aims to allow more members to easily learn how to use and to program their system. A system that is easy to use will also free more time for a shooting leader to superintend the shooters.

    The core part of the system is its reciver, which is epuipped with a Bluetooth Low Energy module to establish a connection with a remote handheld device.

    Both the reciever and rotation target prototype is developed. Different strategies for meeting the specified requirements are evaluated.

    The result is a system that recievs a program sequence from a handheld unit and controls the rotation target prototype as specified by the user.

    Fulltekst (pdf)
    fulltext
  • 295.
    Hammar, Mikael
    et al.
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Energiteknik.
    Huszág, Máté
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET), Bio- och miljösystemforskning (BLESS), Energiteknik.
    Geotermi i Ungern: Undersökning av Ungerns energisituation inriktat på geotermi samt kapacitetsfaktorn för det största geotermiska värmeverket i Mellaneuropa.2014Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    Hungary’s share of renewable energy in 2010 was 7.9 %, and their renewable energy goal for 2020 is 14.65 %. Geothermal energy is one option that could help to achieve the goal, since Hungary has favorable bedrock, the temperature gradient is above average and thepermeability is high. Today Hungary is importing just over half of its primary energy supply. Because of political conflicts between nations Hungary wants to expand its own production of energy. One of the major investments implemented was to build the largest geothermal heating plant in central Europe, located in Miskolc. This degree theses aims is to raise the capacity factor for this heating plant. To achieve this objective, a survey of how grain dryers and absorption chillers could increase the heat load in the summer has been performed. With grain dryers that only dries wheat, the capacity factor for the geothermal heating plant in Miskolc increased by 2.6 % and by 4.4 % for the absorption chiller. Although surveys have been carried out for a specific case the idea can be implemented in other heating plants.

    Keywords: Capacity factor, geothermal energy, wheat dryers and absorptions chiller.

    Fulltekst (pdf)
    Geotermi i Ungern
  • 296.
    Hammarström, Fanny
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Erlandsson, Jonas
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Gröna granulat2016Independent thesis Basic level (degree of Bachelor), 15 poäng / 22,5 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 297. Hansen, Hansen
    et al.
    Ölmén, Henrik
    Equipment changeover reduction of a production line2018Independent thesis Advanced level (degree of Master (One Year)), 10 poäng / 15 hpOppgave
    Abstract [en]

    The growing competition for manufacturing companies is placing increased demand on fulfilling customer requirements with as high quality as possible as quick as possible. To meet the tougher competition, it is common that companies implement various tools and methods such as Lean Manufacturing, Continuous Improvement and Single Minute Exchange of Dies (SMED). Implementing these helps to reduce the risk of production failures while increasing efficiency thus increasing profit.  This thesis brings up the implementation of a tool within Lean Manufacturing called SMED to a production line with the aim to increase the machine availability through reduction of the equipment changeover.  The thesis is a qualitative case study where the authors use interviews, observation and time measurement to gather relevant data which are then analysed for the goal of this thesis which is to reduce the complete equipment changeover time of the production line in Ämnesverkstaden. All the relevant data which was collected resulted in an implementation of a SMED mind-set and an instruction manual with a complementary list of necessary changes.  The authors believe that this study can provide useful information and knowledge when introducing SMED as well as an approach the operators can use in the future to help reduce the equipment changeover.

    Fulltekst (pdf)
    fulltext
  • 298.
    Hansson, Kaisa
    et al.
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Rosén, Sara
    Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap.
    Återanvändning av filtmaterial2017Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    The thesis work is a collaboration with the company Nordifa AB. The work is about making use of the waste material Nordifa gets after manufacturing different products and thereby helping the company to contribute to a cleaner environment. With the waste material the company's range of products will be developed. 

    By weighting requirements and function, the students presented a product in terms of the result. This required a new type of tool in three parts to use in the pressing machine. Drawings for this was developed and sent to Plåtcenter who created the prototype tool. The students have used a design process adapted to the project, which gave the opportunity to focus on what’s relevant which in this case meant finding an optimal production process. 

    The process gave five solution proposals, that after the weighting of requirements led to one which was chosen for continued development. The final concept became a production process in which all waste is used and which provides a design that can be used in multiple material rolling processes for different products. With the help of Rapid Granulator AB, the proposal could become a prototype, as they helped to test grind of the material, which led to the result. This solution also minimized manual work, and gives all staff the opportunity to understand and perform the work process.

    A final concept has been produced and when the project has been completed, the prototype tool has been developed and tested at Nordifa. Further work exists and is based primarily on a decision by Nordifa if they choose to make use of the proposal.

    Fulltekst (pdf)
    fulltext
  • 299.
    Hedenskog, Hannes
    et al.
    Högskolan i Halmstad.
    Swensson, Karl-Philip
    Högskolan i Halmstad.
    Xlight-Retro: En lampa för offentliga inomhusmiljöer2015Independent thesis Basic level (university diploma), 5 poäng / 7,5 hpOppgave
    Fulltekst (pdf)
    fulltext
  • 300.
    Hedén, Niclas
    Högskolan i Halmstad, Sektionen för ekonomi och teknik (SET).
    Låsning till spolkarslock2012Independent thesis Basic level (professional degree), 5 poäng / 7,5 hpOppgave
    Abstract [en]

    Since 2007, I´ve been working in the steel industry in a place called “SSAB”. That’s why itseemed right to contact them for this thesis.The SSAB concern is global, but SSAB Sweden involves raw steel producing in Luleå, heavyplate producing in Oxelösund, and sheet metal producing in Borlänge.

    Fulltekst (pdf)
    fulltext
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