Sökning: "cop"

Visar resultat 16 - 20 av 42 avhandlingar innehållade ordet cop.

  1. 16. Evaporative Cooling Tower and Chilled Beams. Design Aspects for Cooling in Office Buildings in Northern Europe

    Författare :Bengt Bergsten; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pilot plant; cooling tower; simulation; low energy cooling; cooling tower model; free cooling; chilled beams; evaporative cooling; commercial buildings; hydronic cooling system;

    Sammanfattning : The purpose of this thesis is to examine a comfort cooling system consisting of a hydronic cooling system with an evaporative cooling tower and chilled beams. The system has no conventional chiller. LÄS MER

  3. 17. Low-temperature Heating in Existing Swedish Residential Buildings : Toward Sustainable Retrofitting

    Författare :Qian Wang; Sture Holmberg; Natasa Nord; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Retrofitting; Low-temperature heating; Energy efficiency; Sustainability; Swedish residential buildings; Renovering; Lågtemperatursuppvärmning; Energieffektivitet; Hållbarhet; Svenska bostadsbyggnader; Energy Technology; Energiteknik;

    Sammanfattning : As an energy-efficient alternative in cold climate countries such as Sweden, low-temperature heating (LTH) technology has shown promising advantages and shortcuts to contribute to the efficiency of heat supply, as well as to the overall sustainability of building performance. The goal of this thesis is to contribute to the development of methodologies and modeling tools to support sustainable retrofitting in the Swedish housing stock. LÄS MER

  4. 18. Kollaborativ professionell utveckling för innehållsinkluderande undervisning : praktikutvecklande klassrumsforskning

    Författare :Balli Lelinge; Mona Holmqvist; Jonas Alwall; Anette Olin; Malmö universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Collaborative professional development; Content-inclusion; Practice-based research; Communities of practice; Variation theory; Lesson and Learning studies;

    Sammanfattning : In the present thesis, four studies are included within the scientific discipline of pedagogy and collaborative professional development research field—the thesis is based on a practice-based research approach. This thesis addresses identified problems in previous research and large-scale studies such as the OECD study Teaching and Learning International Survey (TALIS) and school leaders’ and teachers’ attitudes. LÄS MER

  5. 19. Modeling and Performance Analysis of Alternative Heat Exchangers for Heavy Vehicles

    Författare :Wamei Lin; Värmeöverföring; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Countercurrent flow; Graphite foam; Heat exchanger; Thermal performance; Computational fluid dynamics;

    Sammanfattning : Cross flow heat exchangers made from aluminum are common as radiators in vehicles. However, due to the increasing power requirement and the limited available space in vehicles, it is extremely difficult to increase the size of heat exchangers (HEXs) placed in the front of vehicles. LÄS MER

  7. 20. Reduction of prime energy consumption by ground source heat pumps in a warmer world

    Författare :Mohamad Kharseh; Jeff Spitler; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vattenteknik; Water Resources Engineering;

    Sammanfattning : Much of the energy used worldwide is supplied by fossil fuels (~85 %) while renewable energy sources supply approximately 6 %. A sustainable future urgently requires worldwide efforts to reduce primary energy consumption and increase use of renewable energy sources. LÄS MER