Sökning: "district heating"

Visar resultat 1 - 5 av 183 avhandlingar innehållade orden district heating.

  1. 1. Small District Heating Systems

    Detta är en avhandling från Chalmers University of Technology

    Författare :Jochen Dahm; Chalmers tekniska högskola.; Chalmers University of Technology.; [1999]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Samhällsbyggnadsteknik och arkitektur; Civil engineering and architecture; district heating; small residential area; dynamic simulation; model calibration;

    Sammanfattning : The objective of this work is to identify, from an economical point of view, the optimal system design and operation strategy for the district heating of a small residential area. The applied methodology is an overall approach on the heat distribution system, the house connection and the space heating system in the building, i.e. LÄS MER

  2. 2. District Heating and CHP Local Possibilities for Global Climate Change Mitigation

    Detta är en avhandling från Linköping : Linköpings universitet

    Författare :Kristina Difs; Linköpings universitet.; Linköpings universitet.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; District heating; combined heat and power; carbon dioxide emissions; optimisation; energy policies; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Global warming, in combination with increasing energy demand and higher energy prices, makes it necessary to change the energy use. To secure the energy supply and to develop sustainable societies, construction of energy-efficient systems is at the same time most vital. LÄS MER

  3. 3. Durability of District Heating Pipes

    Detta är en avhandling från Chalmers University of Technology

    Författare :Stefan Forsaeus Nilsson; Stefan F. Nilsson; RISE.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2002]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Samhällsbyggnadsteknik och arkitektur; Civil engineering and architecture; district heat distribution; district heating pipe; buried pipe; long-term strength; polyethylene; polyurethane foam; stone indentation; reuse of excavated material; pipe joint; moisture diffusion;

    Sammanfattning : This thesis is focused on mechanical loads and moisture related problems with a potential to critically harm the functionality of pre-insulated district heating pipes and pipe joints. Directly buried pipeline bends are investigated with respect to limiting deformations from a thermally induced lateral displacement. LÄS MER

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

    Detta är en avhandling från Göteborg : Chalmers University of Technology

    Författare :Urban Persson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2015]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  5. 5. Sparse district heating and flexible district heating pipes

    Detta är en avhandling från Chalmers University of Technology

    Författare :Charlotte Reidhav; Chalmers tekniska högskola.; Chalmers University of Technology.; [2010]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Byggnadsteknik; Building engineering; Heating single-family houses; low heat density; gas diffusion in semi-flexible polyurethane foam; temperature-dependent thermal conductivity; new experimental method;

    Sammanfattning : The aim of this thesis is to describe sparse district heating conditions and explore how to improve them. Few sparse areas are heated by district heat, which reflects the economic competitiveness. A method that could be used by the district heating companies to identify the boundaries of profitable district heat is presented. LÄS MER