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  • 651.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    European District Heating Price Series2016Report (Other academic)
    Abstract [en]

    This project has been devoted to collection of long time series of national average district heating prices in Europe, since this information is neither collected by the International Energy Agency nor Eurostat.

    In all, relatively long time series of district heating prices have been identified in 23 European countries, of which 20 countries are currently members of the European Union. Additional countries were Iceland, Norway, and Switzerland. These annual average prices have been estimated according to three different methods. Data sources have primarily been various national sources as national statistical authorities. Secondarily, various international sources have been used, when national sources could not provide required information.

    The outputs from this price collection project consist of long time series of national average district heating prices until 2013 and the corresponding annual revenues and heat sales. In all, 560 annual average national district heating prices have been estimated.

    Five main conclusions have been identified concerning European district heating prices:

    1. Currently, very little aggregated information is available about district heating prices in various European countries. The purpose with this price collection has been to close this information gap.
    2. International energy price analysts have therefore excluded district heating prices from their analyses.
    3. Countries with high district heating prices during 2013 were Denmark, Slovak Republic, Germany, Norway, and Sweden.
    4. Countries with low district heating prices during 2013 were Iceland, Bulgaria, Switzerland, Hungary, and Poland.
    5. Countries with high proportions of district heating costs in the disposable incomes during 2013 were Slovak Republic, Lithuania, Latvia, and Estonia.

    Market analyses and further conclusions based on these estimated time series of national district heating prices will be published in another publication. Hence, no explanations for different price levels in various countries have be provided in this report. © 2016 ENERGIFORSK

  • 652.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    European space cooling demands2016In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 110, p. 148-156Article in journal (Refereed)
    Abstract [en]

    Information about European space cooling demands is rare, since cooling demands are not properly measured, when electricity is used for operating space cooling devices. Cooling demands are only measured at deliveries from district cooling systems. However, information about cooling demands by location and country is required for planning district cooling systems and modelling national energy systems. In order to solve this cooling information dilemma, space cooling demands have been assessed for European service sector buildings. These estimations were based on cold deliveries from twenty different European district cooling locations in eight countries. Main findings are that (1) the estimated specific cold deliveries are somewhat lower than other estimations based on electricity inputs and assumed performance ratios, (2) aggregated spacecooling demands are presented by country, and (3) an European contour map is presented for average specific space cooling demands for service sector buildings. © 2015 Elsevier Ltd.

  • 653.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science. Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Fjärrvärmens framtida roll i Europa2017Report (Other academic)
  • 654.
    Werner, Sven
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    International review of district heating and cooling2017In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 137, p. 617-631Article, review/survey (Refereed)
    Abstract [en]

    The purpose with this review is to provide a presentation of the background for the current position for district heating and cooling in the world, with some deeper insights into European conditions. The review structure considers the market, technical, supply, environmental, institutional, and future contexts. The main global conclusions are low utilisation of district heating in buildings, varying implementation rates with respect to countries, moderate commitment to the fundamental idea of district heating, low recognition of possible carbon dioxide emission reductions, and low awareness in general of the district heating and cooling benefits. The cold deliveries from district cooling systems are much smaller than heat deliveries from district heating systems. The European situation can be characterised by higher commitment to the fundamental idea of district heating, lower specific carbon dioxide emissions, and higher awareness of the district heating and cooling benefits. The conclusions obtained from the six contexts analysed show that district heating and cooling systems have strong potentials to be viable heat and cold supply options in a future world. However, more efforts are required for identification, assessment, and implementation of these potentials in order to harvest the global benefits with district heating and cooling. © 2017 The Author

  • 655.
    Werner, Sven
    Chalmers University of Technology.
    The heat load in district heating systems1984Doctoral thesis, monograph (Other academic)
    Abstract [en]

    This thesis considers the composition of the daily heat load in six Swedish district heating systems supplying heat for space heating and hot water supply. The analysis was performed by bringing together a heat load model and series of daily heat load observations covering periods ranging from five to eleven years.

    The influences of transient heat transmission, solar gain, and wind infiltration are found to be significant but small. It is shown that a natural self control of water radiators affects the magnitude of these influences when the control systems are incomplete. The annual fraction of each heat load component, the composition of the heat load duration graph, and the long term changes in heat consumption are presented.

    Furthermore, the heat load composition estimated facilitates future heat load simulations in order to quantify the outcome of various energy conservation measures with respect to reductions in design heat load and annual heat demand.

  • 656.
    Werner, Sven
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Ericsson, Karin
    Department of Technology and Society, Lund University, Lund, Sweden.
    Three decades of biomass use in Swedish district heating systems2015In: European Biomass Conference and Exhibition Proceedings, Florence: ETA-Florence Renewable Energies , 2015, p. 519-528Conference paper (Refereed)
    Abstract [en]

    More than two thirds of the heat supply to the Swedish district heating systems is nowadays based on biomass and waste resources. These district heating systems provide heat to cover more than half of the heat demands in the Swedish building stock. This paper reveals the development from the original use of fossil fuels in the late 1970s, the introduction of biomass as fuel in the early 1980s, the transition to considerable more renewables during the 1990s, and to the current situation when biomass dominates the heat supply. Our four conclusions consider the established infrastructure in both forestry and district heating, driving forces from energy policy tools and local initiatives, the contradiction between primary energy use of biomass and traditional heat recovery, and finally the future challenge of competitive use of biomass.

  • 657.
    Werner, Sven
    et al.
    Department of Energy and Environment, Chalmers University of Technology, Göteborg, Sweden.
    Forsaeus Nilsson, Stefan
    SP Technical Research Institute of Sweden, Göteborg, Sweden.
    Reidhav, Charlotte
    Department of Civil and Environmental Engineering, Chalmers University of Technology, Göteborg, Sweden.
    Lygnerud, Kristina
    School of Business, Economics and Law, Department of Business Administration, Göteborg University, Göteborg, Sweden.
    Sparse district-heating in Sweden2008In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 85, no 7, p. 555-564Article in journal (Refereed)
    Abstract [en]

    This paper presents a review of the sparse district-heating research programme undertaken in Sweden between 2002 and 2006. The goal of the programme was to increase the future competitiveness for district heat in low heat density areas, e.g., suburban single-family houses and small villages. Such areas are unfavourable, since revenues from heat sold are low compared with the investment cost for the local distribution network. In Sweden, district heat has a dominant position in the heat market for residential and service-sector buildings. In order for the business to grow, it is necessary to increase the rate of expansion in the detached-house segment. This is why the programme was initiated. The extent of the programme was set at € 3.6 million with equal financing from the Swedish District-Heating Association and the Swedish Energy-Agency. The research was carried out in three phases: a state of the art survey; a development phase focused on productivity gains where new research on both technology and customer interaction was performed; and finally a demonstration phase where new methods were tested in full-scale field operation. The programme has shown that the Swedish district-heating industry needs to adjust in order to reach a higher profitability for sparse district-heating investments. Tradition from large-scale high-density district heating is hard to scale to fit sparse district-heating systems. For example, the construction becomes very labour intensive and the industry is weak when it comes to market-oriented business logic, sales and private customer interaction. Innovation seems to be a way forward and active management of innovations is a way to create increased value of the investments. Other keys to improving the profitability of sparse district-heating investments are more efficient working routines (resulting in higher productivity) and revised ways of customer communications. These seem more important than increasing efficiency in district-heating technology. © 2007.

  • 658.
    Werner, Sven
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energiteknik.
    Frederiksen, Svend
    Lunds Universitet.
    Fjärrvärme och fjärrkyla2014Book (Refereed)
    Abstract [sv]

    Effektiv förflyttning av värme och kyla i stadsområden är det huvudsakliga syftet med fjärrvärme- och fjärrkylesystem. Genom att koppla samman kundernas värme- och kylbehov med olika tillgängliga värme- och kylkällor kan man tillgodose behoven med ett totalt lägre resursutnyttjande än med konventionella värmepannor och luftkonditioneringsaggregat.

    Denna lärobok innehåller avsnitt om den grundläggande affärsidén, energimarknader, kundbehov, lastvariationer, värmetillförsel, miljöpåverkan, distribution, fjärrvärmecentraler, systemfunktion, ekonomi, planering, historisk utveckling, nutida oh framtida användning, organisation och informationskällor avseende flöden av värme och kyla i fjärrvärme- och fjärrkylesystem.

    Fjärrvärme och fjärrkyla är en tvärvetenskaplig teknik med element från många allmänna tekniker och metoder som förbränning, värmeöverföring, rörströmning, marknadsföring, fakturering etc. Vår uppgift har varit att ge grundläggande inledande kunskaper om typiska aspekter på fjärrvärme och fjärrkyla, vilka vi har bedömt vara viktiga för den grundläggande förståelsen eller mycket unika för denna nischteknik.

    Vi har haft ett brett spektrum av läsare i åtanke. Vår huvudsakliga målgrupp är fjärrvärmeingenjörer, universitetsstudenter, och anställda på fjärrvärmeföretag. Vi skulle också uppskatta om stadsplanerare, ekonomer, politiker och andra som är intresserade av ämnet kommer att tycka att den här boken ger konkret och användbar information om fjärrvärme och fjärrkyla.

  • 659.
    Werner, Sven
    et al.
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    Gong, Mei
    Halmstad University, School of Business, Engineering and Science, Biological and Environmental Systems (BLESS), Energy Science.
    District heating research in China2014Report (Other academic)
    Abstract [en]

    District heating is growing rapidly in China as Chinese building areas is expanding fast giving increased heating and cooling demands. This report gives an overview of the current situation for district heating and the research and development in this sector in China. Possibilities for collaboration between Swedish and Chinese researchers and companies in the field of district heating and cooling are also presented.

  • 660.
    Werner, Sven
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Lund, Henrik
    Aalborg University, Aalborg, Denmark.
    Vad Mathiesen, Brian
    Aalborg University, Aalborg, Denmark.
    Progress and results from the 4DH research centre2014In: Proceedings from the 14th International Symposium on District Heating and Cooling: September, 6-10, 2014: Stockholm, Sweden, Stockholm: Swedish District Heating Association , 2014, p. 302-307Conference paper (Refereed)
    Abstract [en]

    With lower and more flexible distribution temperatures, fourth generation district heating systems can utilize renewable energy sources, while meeting the requirements of low-energy buildings and energy conservation measures in the existing building stock. 4DH is an international strategic research centre located at Aalborg University, which develops 4th generation district heating technologies and systems (4GDH). This technology is fundamental to the implementation of the Danish objective of being fossil fuel-free by 2050 and the European 2020 goals. The research centre is working between 2012 and 2017, with The Danish Council for Strategic Research as main financier and the participating 31 Danish and international companies and universities as co-financiers. Thirteen PhD student projects constitute a vital part of the research centre. In 4GDH systems, synergies are created between three areas of district heating and cooling, which also sum up the work of the 4DH Centre: Grids and components; Production and system integration, and Planning and implementation. This paper presents an overview of the progress and results achieved after more than two years of work. This includes the basic definition paper, the two Heat Roadmap Europe pre-studies, annual conferences, additional demonstration projects, initiated European project proposals, an international PhD course based on the new international textbook, PhD student seminars, all PhD student subjects, and a list of major papers and articles written so far within the research centre.

  • 661.
    Werner, Sven
    et al.
    Halmstad University, School of Business, Engineering and Science, The Rydberg Laboratory for Applied Sciences (RLAS).
    Lygnerud, Kristina
    IVL Svenska miljöinstitutet, Sverige.
    Sernhed, Kerstin
    Lunds Universitet, Lund, Sverige.
    Lauenburg, Patrick
    Lunds Universitet, Lund, Sverige.
    En syntes av Fjärrsyn 2013-2017: Bortom förnybart2017Report (Other academic)
  • 662.
    Werner, Sven
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Reidhav, Charlotte
    Chalmers University of Technology, Gothenburg, Sweden.
    Profitability of sparse district heating2008In: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 85, no 9, p. 867-877Article in journal (Refereed)
    Abstract [en]

    The expansion of district heating into areas of low heat densities (heat sparse areas) constitutes a challenge due to the higher distribution costs. The profitability of sparse district heating has been analysed from actual investments in 74 areas with 3227 one-family houses connected to district heating between 2000 and 2004 in Göteborg, Sweden. The profitability was estimated from a probable price model, a typical marginal heat generation cost, and the investments from the actual connections made. The analysis identified factors as the linear heat density and heat sold per house explaining the main variations in profitability. The profitability analysis was concluded with a competition analysis. The main conclusion is that sparse district heating is possible when reaching low investment costs for the local distribution network and low marginal costs for the heat generation. In Sweden, the general competitiveness of sparse district heating is facilitated by the high consumption taxes for fuel oil, natural gas, and electricity. Hence, it should be more difficult to introduce sparse district heating in other countries with low energy taxes. © 2008.

  • 663.
    Westerlund Rashidi, Emilia
    et al.
    Halmstad University, School of Social and Health Sciences (HOS).
    Becic, Amela
    Halmstad University, School of Social and Health Sciences (HOS).
    Konsultchefers upplevelser i yrkesrollen: En kvalitativ studie om konsultchefers rollhantering, känsloarbete och ledarskap på bemanningsföretag.2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Vi har undersökt konsultchefer på ett bemanningsföretag. Syftet med studien har varit att ta reda på hur de upplever sina olika roller, vilket känsloarbete de utför i dessa roller, samt hur ledarskapet ser ut i chefsrollen. Vi har utgått från ett individperspektiv och med kvalitativ ansats intervjuat sex konsultchefer på ett bemanningsföretag, för att ta reda på vår frågeställning: Hur upplever konsultcheferna sina olika roller (som chef och säljare) och vilket känsloarbete utför de i rollerna mot konsulter och kunder? Denna har vi besvarat med hjälp av tre huvudsakliga teoretiska ramar: Goffmans (2009) dramaturgiska teori, Hochschilds (2003)teorier om emotionellt arbete och slutligen Sandahl et al.s (2010) teorier om chefens roll i organisationen. Undersökningen visade att konsultcheferna upplever det vara viktigare att “hålla rollen” som säljare mot kunder, än rollen som chef mot konsulter. De använder sig av Surface acting i sitt känsloarbete för att göra kunderna nöjda. Konsultcheferna bearbetar sina “underliggande äkta känslor” genom att samtala med sina kollegor. I rollen som chef är konsultcheferna behandlande mot konsulterna, samtidigt som de leder och styr konsulterna i arbetet.

  • 664.
    Wickström, Nicholas
    Halmstad University, School of Information Science, Computer and Electrical Engineering (IDE).
    Virtual sensing of combustion quality in SI engines using the ion current2004Doctoral thesis, comprehensive summary (Other academic)
  • 665.
    Wickström, Nicholas
    et al.
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Byttner, Stefan
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Hellring, Magnus
    Volvo Technology Corporation, Gothenburg, Sweden.
    Rögnvaldsson, Thorsteinn
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Neural networks for extracting the pressure peak position from the ion current2004In: Virtual sensing of combustion quality in SI engines using the ion current, Göteborg: Chalmers tekniska högskola , 2004, p. 95-110Chapter in book (Other academic)
  • 666.
    Wihlborg, A.
    et al.
    Epsilon Development AB, Göteborg.
    Wiklund, Daniel
    Chalmers University of Technology, Göteborg.
    Rosén, B-G.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK).
    Surface indentation test (SIT) for friction prediction in mixed lubrication of coated sheets2002In: Boundary and mixed lubrication: science and application. Proceedings of the 28th Leeds-Lyon symposium on tribology / [ed] D. Dowson, M. Priest, G Dalmaz, A.A. Lubrecht, Amsterdam: Elsevier , 2002, p. 461-466Conference paper (Refereed)
  • 667.
    Wihlborg, Anders
    et al.
    Epsilon Development AB, Gothenburg, Sweden.
    Wiklund, Daniel
    Chalmers University of Technology, Gothenburg, Sweden.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    The Influence of Lubricants Kinematic Viscosity and Steel Sheet Surface-Topography in a Bending Under Tension Friction Test2001In: Tribology 2001 - scientific achievements, industrial applications, future challenges: plenary and session key papers from the 2nd World Tribology Congress ; Vienna, Austria, 3-7 September 2001 / [ed] F. Franek, W.J. Bartz, A. Pauschitz, Wien: Österreichische Tribologische Gesellschaft , 2001Conference paper (Refereed)
  • 668.
    Wiklund, Daniel
    et al.
    Institutionen för material- och tillverkningsteknik, Tillverkningsteknik, Chalmers tekniska högskola.
    Nilsson, Larsgunnar
    Nilsson, Bertil
    Halmstad University, School of Information Technology, Halmstad Embedded and Intelligent Systems Research (EIS).
    Andersson, Alf
    Rosén, Bengt Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Gunnarsson, Lars
    On the Implementation and Evaluation of a Roughness Based Friction Model in FE Simulations of Sheet Metal Forming2006In: Proceedings of The 12th Nordic Symposium on Tribology, Lyngby: DTU Mechanical Engineering , 2006Conference paper (Refereed)
  • 669.
    Wiklund, Daniel
    et al.
    Calmers University of Technology, Gothenburg, Sweden.
    Wihlborg, Anders
    Epsilon Development, Gothenburg, Sweden.
    Rosén, B.-G.
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    A Comparative Surface Topography Study of FEM Simulation and Surface Indentation Tests (SIT) on Friction Prediction in Steel Sheet Forming2003In: 10th Nordic Symposium on Tribology: NORDTRIB 2002, Stockholm: Kungliga Tekniska högskolan, 2003, p. 54-54Conference paper (Refereed)
  • 670.
    Wilhelmsson, Niklas
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Viktorsson, Daniel
    Halmstad University, School of Business, Engineering and Science.
    Nivellerande hyttinfästning2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 671.
    Winberg, Robin
    Halmstad University, School of Business and Engineering (SET).
    Konstruktion av justerbar madrass till lastbilshytt2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 672.
    Winde, Pierre
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Lindström, David
    Halmstad University, School of Business, Engineering and Science.
    Silent Workspace2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 673. Winqvist, Madeleine
    et al.
    Andersson, Johannes
    ROADMATE2015Independent thesis Basic level (professional degree), 15 credits / 22,5 HE creditsStudent thesis
  • 674.
    Xiao, Li
    Chalmers University of Technology, Göteborg, Sweden.
    Effect of rough surface anisotropy on friction in gears2002Licentiate thesis, comprehensive summary (Other academic)
  • 675.
    Xiao, Li
    et al.
    Chalmers University of Technology, Gothenburg, Sweden.
    Amini, Naser
    Volvo Car Corporation, Gothenburg, Sweden.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    An Experimental Study on the Effect of Surface Topography on Rough Friction in Gears2001In: Proceedings of the JSME International Conference on Motion and Power Transmissions: MPT2001-Fukuoka; November 15 - 17, 2001, Fukuoka, The Japan Society of Mechanical Engineers , 2001, Vol. 2, p. 547-552Conference paper (Other academic)
  • 676.
    Xiao, Li
    et al.
    Department of Production Engineering, Chalmers University of Technology, Gothenburg, Sweden.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Amini, Naser
    Volvo Car Corporation, Gothenburg, Sweden.
    Surface lay effect on rough friction in roller contact2004In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 257, no 12, p. 1301-1307Article in journal (Refereed)
    Abstract [en]

    Surface lay describes the direction of the predominant surface pattern. A properly designed surface texture configuration has been recognised as a vital issue affecting lubrication and sliding in machinery applications in the literature. Gaining understanding of this tribological phenomenon is no doubt beneficial in facilitating the production of more efficient machine parts and thus reduces production cost. This paper describes an experimental method to investigate the effect of surface lay on lubricated rolling/sliding of ground roller surfaces. By using the rough friction test rig, different surface lay contacts can be simulated and the friction can be measured. Friction behaviour was interpreted in terms of Stribeck curves (friction coefficient as the function of Hersey parameter [ηv/p]). Results show that an optimal contact lay angle that provides a minimum friction value is achievable through rig testing. The relative sliding speed direction has a symmetrical effect on friction at the same lay orientation; for sliding speed angles less than about 80, the larger the angle, the lower the friction, and vice versa. © 2004 Elsevier B.V. All rights reserved.

  • 677.
    Xiao, Li
    et al.
    Department of Production Engineering, Chalmers University of Technology, Gothenburg, Sweden.
    Rosén, Bengt-Göran
    Halmstad University, School of Business, Engineering and Science, Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Amini, Naser
    Volvo Car Corporation, Gothenburg, Sweden.
    Nilsson, Per H.
    Volvo Technological Development, Gothenburg, Sweden.
    A study on the effect of surface topography on rough friction in roller contact2003In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 254, no 11, p. 1162-1169Article in journal (Refereed)
    Abstract [en]

    The friction behaviour of gear teeth in the context of tribology can have a strong effect on housing vibration, noise and efficiency. One of the parameters that greatly influences the friction under certain running conditions is surface roughness. In this work, rough friction was studied in lubricated sliding of roller surfaces, which were manufactured to simulate the real gear surfaces. By examining 3D surface topography of two mating bodies, both surface roughness and its effect on friction behaviour can be studied. In a previous study, a rough-friction test rig has been designed, constructed and initially verified. The types of surfaces involved in this study are ground, shot-peened, phosphated and electrochemically deburred. These rollers were subjected to the same friction testing procedures. Roller surfaces were then examined, and correlation between the topography and the frictional behaviour was analysed. Friction behaviour was interpreted in terms of Stribeck curves (friction coefficient as the function of Hersey parameter (ην/p)). The results showed that electrochemically deburred and certain phosphated surfaces provide lower friction coefficient values which are competitive to fine-ground surfaces in lubricated rolling/sliding contact. © 2003 Elsevier Science B.V. All rights reserved.

  • 678.
    xinjing, chen
    et al.
    Halmstad University, School of Business and Engineering (SET).
    simin, pan
    Halmstad University, School of Business and Engineering (SET).
    The influences of national culture on new product development collaboration2011Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
    Abstract [en]

    To  ensure  success  in  the  rapid  pace  of  globalization,  it  is  crucial  for  companies  to understand the management practice within and outside national boundaries. This study investigates  the  influences  of  national  culture  on  new  product  development  (NPD) collaboration between China and Sweden.  

    By applying  the  qualitative approach  with a single  case,  the  study  shows that national culture influences on NPD  collaboration  by  means  of organizational  culture and  work values   regarding   six   national   culture   dimensions   between   China   and   Sweden. Concerning  organizational  culture,  power  distance  and  masculinity  versus  femininity dimensions  of  national  culture  have  impacts  on  NPD  collaboration.  In  terms  of  work values, the  influences  of power  distance and uncertainty avoidance are  ranked at  first place, whereas individualism and collectivism, masculinity  versus femininity, harmony and long-term versus short-term orientation are relative weak comparing with first two dimensions.  

    However,  the  results  also  show  that  some  organizational  characteristics  including uncertainty  avoidance,  long-term  versus  short-term  orientation  and  harmony  have barely  effects on NPD  collaboration. This  implies that there  could  be  context-specific factors  that  affect  performances  of  NDP  collaboration  regardless  of  in  which  country the NPD project takes place.

  • 679.
    Ylander Mikkelsen, Kristoffer
    et al.
    Halmstad University.
    Geraldsson, Oskar
    Halmstad University.
    Optimization of Granulate 3D Printer: Focus on cooling2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The authors, Oskar Geraldsson and Kristoffer Ylander Mikkelsen, together with Svenska Konstruktörsbyrån AB, have customized and optimized a granulate 3D printer. The main goal for the authors is to improve the cooling of the liquid ABS plastic leaving the nozzle to prevent displacement and dislocation during the printing process. Furthermore the printers current state is poor resulting in further work regarding the overall mechanics of the printer such as the power supply, electrical motors and linear guides.

    The authors have studied existing 3D printers and searched through scientific articlesto get inspiration and knowledge of the mechanical process of the printers aswell as the materials.

  • 680.
    Yousaf, Daowd
    Halmstad University, School of Business, Engineering and Science.
    Lyft anpassad efter en Golf boll Plockare2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 681.
    Zahouani, Hassan
    et al.
    Laboratoire de Tribologie et Dynamique des Systèmes, ENIS, St. Etienne, France.
    Mezghani, M.
    Laboratoire de Mécanique et de Procédés de Fabrication, Arts et Métiers ParisTech, Châlons en Champagne, France.
    El Mansori, M.
    Laboratoire de Mécanique et de Procédés de Fabrication, Arts et Métiers ParisTech, Châlons en Champagne, France.
    Rosén, Bengt-Göran
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Functional Surfaces.
    Thomas, Tom
    Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK).
    Effect of Hölder Exponent of Roughness in Contact and Dry Friction Problems2009In: Proceedings of the 12th International Conference on Metrology and Properties of Engineering Surfaces / [ed] P. Pawlus, L. Blunt, B.-G. Rosén, T. Thomas, M. Wieczorowski, H. Zahouani, Rzeszow: Rzeszow Univ. of Technology , 2009Conference paper (Refereed)
  • 682. Zelic, Dani
    et al.
    Hjelm, Markus
    Konstruktion av en surdegsvagn till bageriproduktion2017Independent thesis Basic level (university diploma), 5 credits / 7,5 HE creditsStudent thesis
    Abstract [en]

    This thesis involves the process of designing a wagon for the company Majgården AB, a company working with bakery production.

    The used method follows mostly Fredy Olsson´s (1995) work process using Principle Design as well as Primary Design in order to design a final concept. Initially, in the beginning of the thesis, it was analyzed how the product will be used and in what kind of environment. The analysis allowed a definition of requirements that the product needs to fulfill. Next step included extracting different product sketches that could be used as possible solutions. The solutions were compared against the requirements and a final, optimal concept was chosen to continue the work with. The final sketch was then further improved. The design of the final concept was then fully finalized with help of a 3D program. 

  • 683.
    ZEWGW, MESFIN ASFAW
    Halmstad University, School of Business, Engineering and Science.
    FRUGAL INNOVATION OF PROSTHETIC SOCKET FOR DEVELOPING COUNTRIES2015Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Abstracts

    In this thesis, we presented a frugal product and methodology for customizing prosthetic socket for developing countries where an overwhelming number of prostheses are necessary, and the availability, accessibility and cost of prosthetics are significant concerns to limb deficient persons that without the assistance of a prosthetic device may not be able to function. In order to design a frugal prosthetic socket, a design methodology is sought that will best achieve an appropriately designed, low-cost, with simple production method. Through the study of modern design methodologies, a strategy is proposed that emphasizes the intersection of the mechanical design process (contemporary design tools), biomechanics, and low-cost design. Key components of this methodology are previous research and frugal innovation in the design process. Along with a review of the state of the art, provide the groundwork for both the proposed new methodology as well as generating a new concept of prosthetic socket. The result of this study, using the generated concept and simple methodology, a frugal prosthetic socket (FPS) is developed to demonstrate the basic functionality of the concept and manufacturability of the proposed method. Finally, Frugal Prosthetic Socket is found as a solution for the problems since it can reduce one heavy complex process for optimizing customization of the prosthetic socket and reduce 70 % of the cost of the prosthetic socket by using local material (rawhide), local manufacturing technique and implementing frugal innovation concept.

  • 684. Zivojinovic, Petar
    et al.
    Roos, Mattias
    PALU2014Independent thesis Basic level (professional degree), 15 credits / 22,5 HE creditsStudent thesis
  • 685.
    Åkesson, Liza
    Halmstad University, School of Business and Engineering (SET).
    Framtagning av primärkonstruktion till nytt cykellås2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Bicycle thefts are a common problem in today’s society. In Sweden, 65 700 bicycle thefts were reported to the police during 2011. The market’s bicycle locks are in one or another way possible to break up. As soon as the lock is broken the bicycle is as useful as before. The client of the bachelor thesis had ideas about a new bicycle lock which prevents the usefulness of the bicycle after the lock has been broken. The idea resulted in cooperation between the client, me and the technical consulting company, Cross Design. The collaboration developed the idea and resulted in this bachelor thesis.

    The thesis purpose has been to create a primary construction of a new bicycle lock which does not exist on today’s market. A construction process has been followed and delimited to principle and primary construction.

    The study includes a product research, development of criteria from the client and the European standards EN 14764: 2005, City and trekking bicycles - Safety requirements and test methods and EN 15496: 2008, Cycles – Requirements and test methods for cycle locks, requirements. The criteria development was followed by creating ideas and result in a primary solution which was constructed and calculated in Catia V5.  

    An innovative bicycle lock which prevents the bicycle’s usefulness after the lock is broken was the thesis result. The primary construction has given the client a base for further development of a prototype and manufacturing construction.

    Some parts of this version are withheld because of confidentiality reasons.

  • 686.
    Åström, Oscar
    et al.
    Halmstad University, School of Social and Health Sciences (HOS).
    Landin, Robin
    Halmstad University, School of Social and Health Sciences (HOS).
    Ledarskap i en agil verksamhet: En kvalitativ studie om hur ledarskapet påverkas vid en förändring2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to explore and understand how leadership is affected when an organization was undergoing a change to an agile business. The background to the survey is based on the traditional view of leadership as the manager led and distributed work. During the 1950s, changed the perception of management and labor in which employees became more involved in the work process.

    Starting from this, our research focused on the effects of leadership that occurs when an organization goes from "command and control" to "empowerment". Hence, we will address the following questions: How has the control (across teams) changed for the line manager in the transition from Classic Waterfall to Agile, How has the change affected the line manager's information retrieval to implement IPM-dialogues and How does the change in style of leadership impact the organization when entering an agile organization.

    We have used a qualitative method in which eight semi-structured interviews were conducted with line managers from two departments to collect the empirical material. The results have indicated that the physical location affects both the control and management style of line managers. Leadership style is also influenced largely by the employees' level of maturity and that the organization is in process of a change.

  • 687.
    Åström, Sara
    et al.
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Jorlöv, Josefine
    Halmstad University, School of Business and Engineering (SET), Biological and Environmental Systems (BLESS), Energiteknik.
    Karaktärisering av solcellsmoduler: en fördjupning i solcellsteknik och metoder för karaktärisering2013Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Sveriges Tekniska Forskningsinstitut, SP, has recently invested in a pulsed solar simulator to measure and characterize photovoltaic modules. The following report investigates the differences in the analysis between the new solar simulator and SP's existing pulsed solar simulator. All measurements have been performed on four different solar modules, two solar modules of type CIS and two solar modules of type crystalline silicon. We have also carried out practical measurements to see which environmental factors that affect the analysis from the new solar simulator. The surrounding factors consisted of ambient lighting, reflections from the new solar simulator and soiling of the monitor cell. The results show a difference between the quantified values of the new and existing solar simulator, where most of the measurements in the existing solar simulator are higher. The differences are probably due to measurements being made at a higher irradiance level than according to the standard. Furthermore, the results show that there are environmental factors affecting the analysis from the new solar simulator; a soiled monitor cell have the greatest influence on the outcome. 

  • 688.
    Öhman, Oliver
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Wikman, Christian
    Halmstad University, School of Business, Engineering and Science.
    Konstruktion av svingarm till EcoistVehicleTM2017Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This report will be about a mechanical design project that has been developed by Christian Wikman and Oliver Öhman. The assignment was given by EcoistVehicleTM to complete a bachelor’s degree in mechanical engineering at Halmstad University.

    Princip- och Primärkonstruktion (Olsson, 1995), Fundamentals of Vehicle Dynamics (Gillespie, 1992) and a large amount of research on the web has been used as the foundation for the method that’s been used all through this project.

     

    EcoistVehicleTM is a vehicle project started by Thomas Koch. It is an electrically powered, single seat, three wheeled vehicle that's driven by a single rear wheel. The idea behind the car is to transport the driver to his destination in an environmentally friendly way. The car is suited for commuting in the countryside with a range of 40-50km. The purpose of the assignment that was given in the spring of 2017 was to look into faster methods of designing and manufacturing a swingarm for the vehicle.

     

    Our assignment was to design and possibly manufacture a swingarm for the driving rear wheel that should fit the specifications of the car and have a relatively fast manufacturing process for a series of 10-20 cars. Our mentor and taskmaster has a request to 3D-print the larger parts of the swingarm then after work the mounting surfaces and mating surfaces with milling.

    Several manufacturing processes used in the automotive industry for the production of motorcycle swingarms will be screened and compared to get the method that will fit this project.

     

    The authors have contributed with a higher knowledge of 3D-printing, specifically aluminum, different design concepts together with analysis of the design to test the solidity of the final product.

  • 689.
    Ölmeby, Sara
    et al.
    Halmstad University, School of Business, Engineering and Science.
    Weber Hansson, Jessica
    Halmstad University, School of Business, Engineering and Science.
    Hälsomätningar på vårdcentraler2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis work has been carried out in collaboration with a specialist physician and Hälsoteknikcentrum Halland. The project is a part of an innovation project which involves developing a health scanner that will be able to carry out standard measurements on patients and thereby facilitate and streamline healthcare. The part in this report concerns the development of the booth itself for the complete product as well as the attachment of the technology. The thesis objective is about developing a concept that automatically adjusts the instruments depending on the patient being measured, as well as creating an optimal environment where the measurements can be performed correctly.

    By using brainstorming and a functional analysis, a number of concepts could be developed. These were then evaluated against the analysis and further developed to match the specification of requirements and other guidelines. The result was a booth, adapted for both sitting and standing positions, with an automatically closing folding wall and with an arm that keeps the patient at the right distance from the measuring devices. The project has also included an investigation of, as well as discussion about, the materials and manufacturing methods that may be used in a future production of the concept.

    The result was a virtual model, ready to be used for the production of a real-size prototype. In addition, the model was also used to visualize the concept in the form of images and animations made in KeyShot 6.

  • 690.
    Österberg, Ellen
    et al.
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Sustainability, Innovation and Management in Building (SIMB).
    Vilén, Anna
    Halmstad University, School of Business, Engineering and Science, Centre for Innovation, Entrepreneurship and Learning Research (CIEL), Sustainability, Innovation and Management in Building (SIMB).
    Utökad sätesjustering av “The Armadillo“2018Independent thesis Basic level (university diploma), 180 HE creditsStudent thesis
    Abstract [en]

    This report describes a solution to an adjustment problem found on “The Armadillo”. This product can be described as a bicycle, but with four wheels instead of two, and has a somewhat more complex construction than an electric bicycle. In today’s construction there are difficulties in using the bike if the driver is not within the range of 170-190 cm tall, which obviously limits the user of the product. The main user are those who work with the product. The task of the project was therefore to find a solution to this problem, with free hands without major limitations. This has been done in cooperation the company that owns the product, Velove, where a couple of visits have been made to study the design further, as well as examine the possibilities and limitations that exist. Methods such as Fredy Olsson with small modification have been used, this has simplified the work as a clear structure has been obtained on approaches. The project group has used different ideas to generating and evaluating product ideas, including where we included other students for inspiration, in order to reach a promising concept within the group. Two ready-made digital prototype concepts have been developed in Catia V5, where one of them has advanced into a physical prototype in plastic material. The construction allows a longer span and allows more drivers to use today’s Armadillo. The solution is another smaller rail that goes over the today’s existing rail witch makes it possible to further adjust the length span for the driver. The construction is a superstructure on the existing Armadillo and does not require a reconstruction of the bike.

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