Search for dissertations about: "Secondary energy"

Showing result 1 - 5 of 301 swedish dissertations containing the words Secondary energy.

  1. 1. Heat demand profiles of buildings' energy conservation measures and their impact on renewable and resource efficient district heating systems

    University dissertation from Västerås : Mälardalen University

    Author : Lukas Lundström; Mälardalens högskola.; [2016]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; district heating; energy conservation; weather normalisation; typical meteorological year; building energy simulation; system analysis; Energy- and Environmental Engineering; energi- och miljöteknik;

    Abstract : Increased energy performance of the building stock of European Union is seen as an important measure towards mitigating climate change, increasing resource utilisation efficiency and energy supply security. Whether to improve the supply-side, the demand-side or both is an open issue. READ MORE

  2. 2. A Framework for Sustainable Strategic Energy Company Investment Analysis and Decision-support: Towards the Operationalisation of Sustainable Energy Systems

    University dissertation from Pepukaye Bardouille, Environmental- and Energy Systems Studies, Gerdagatan 13, 223 62 Lund, Sweden

    Author : Pepukaye Bardouille; Lunds universitet.; Lund University.; [2001]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Miljöteknik; pollution control; Environmental technology; energy company strategic investment analysis; environmental decision-making; sustainable energy systems; strategic decision-support; kontroll av utsläpp; Energy research; Energiforskning;

    Abstract : In addition to being a key criterion of the sustainable development proviso, for business, the integration of social- and ecological considerations into decision-making is of growing importance for minimising future environmentally-related risk and associated economic costs, as well as gaining a share in growing markets favouring products and companies focusing upon social responsibility and ecological protection. The study focuses upon addressing the research question: how can socio-ecological considerations be incorporated into energy companies' formal strategic investment analysis and decision-making processes, so as to facilitate the development of sustainable energy systems?. READ MORE

  3. 3. District heating in future Europe Modelling expansion potentials and mapping heat synergy regions

    University dissertation from Göteborg : Chalmers University of Technology

    Author : Urban Persson; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; district heating; energy efficiency; distribution capital cost; heat demand density; plot ratio; excess heat recovery; sequential energy supply; heat utilisation rate; effective width;

    Abstract : This thesis presents a set of methodologies and approaches to investigate and determine the extent by which district heating can contribute to improved energy system efficiency and reduced carbon dioxide emissions in future Europe. The main motivation for suggesting large-scale implementation of district heating as a structural energy efficiency measure to obtain these objectives originates essentially in the predicament that a majority of European buildings today remain highly dependent on fossil fuels to provide energy needed for space heating and hot water preparation. READ MORE

  4. 4. Distributed thermal response tests New insights on U-pipe and Coaxial heat exchangers in groundwater-filled boreholes

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : José Acuña; KTH.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Borehole heat exchangers; Distributed Thermal Response Test; Ground Source Heat Pumps; Coaxial; U-pipe; Multi-pipe; Pipe-in-pipe; Multi-chamber; Groundwater; Thermosyphon; SRA - Energy; SRA - Energi;

    Abstract : U-pipe Borehole Heat Exchangers (BHE) are widely used today in ground source heating and cooling systems in spite of their less than optimal performance. This thesis provides a better understanding on the function of U-pipe BHEs and Investigates alternative methods to reduce the temperature difference between the circulating fluid and the borehole wall, including one thermosyphon and three different types of coaxial BHEs. READ MORE

  5. 5. Strategies for Reduced Energy Use and Cost in Pulp and Paper Mills by Energy Integration of the Paper Drying Process

    University dissertation from Department of Chemical Engineering, Lund University

    Author : Kristian Lindell; Lunds universitet.; Lund University.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Paper; Pappers- och massateknik; pulp and paper technology; Wood; Energiforskning; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Combined dryer; Energy research; Black liquor gasification; Heat recovery; Secondary energy; Co-generation; Costs; Energy; Drying;

    Abstract : The cost of energy for drying paper is substantial for the pulp and paper industry, and studies of various strategies for energy cost reductions such as increased energy efficiency, increased heat recovery from the exhaust drying air and reduced cost of the process heat are presented in this thesis. The energy use and cost studies were performed using a block-model based simulation tool developed for this specific purpose. READ MORE