Sökning: "air-source"

Visar resultat 1 - 5 av 8 avhandlingar innehållade ordet air-source.

  1. 1. Frosting and Defrosting of Air-Coils

    Författare :Per Fahlén; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; heat pump; defrost; air-coil; air-source; control; frost; optimized;

    Sammanfattning : Experience indicates that air-source heat pumps have more operating problems than ground-source heat pumps. One major factor pertains to the effects of frosting and the subsequent need for defrosting. This thesis reviews previous research and practical experience and presents novel experimental facilities to investigate the process of frosting. LÄS MER

  3. 2. Capacity Control of Residential Heat Pump Heating Systems

    Författare :Fredrik Karlsson; RISE; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy efficiency; variable-speed; air-source; performance; hydronic heating system; ground-source; heat pump; defrost; optimisation; circulator; capacity control;

    Sammanfattning : Heat pumps used for space and sanitary hot water heating of residential buildings are increasingly popular in northern Europe. As they compete with other heating equipment and in order to limit the environmental impact of their use, it is very important that heat pumps are energy efficient. LÄS MER

  4. 3. Performance tests of air source heat pumps under frosting conditions : quality of results Per Fahlén

    Författare :Per Fahlén; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : .... LÄS MER

  5. 4. Born in fire, borne by air : Source attribution and physicochemical characterization of ship and ambient aerosols in the Baltic region

    Författare :Stina Ausmeel; MERGE: ModElling the Regional and Global Earth system; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; anthropogenic air pollution; aerosol; black carbon; plumes; ship emissions; absorption; source apportionment; climate; Fysicumarkivet A:2020:Ausmeel;

    Sammanfattning : Aerosol emissions from anthropogenic activities cause detrimental health effects and affect the climate system. Combustion is a large source of airborne fine particulate matter (PM2.5) and the uncertainties of the climate role of these emissions are still large. LÄS MER

  7. 5. Solar heat pump systems for heating applications : Analysis of system performance and possible solutions for improving system performance

    Författare :Stefano Poppi; Per Lundqvist; Chris Bales; Kai Siren; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solar heat pump systems; techno-economics; solar thermal; system improvements; cost-effectiveness; Energiteknik; Energy Technology; MacSheep;

    Sammanfattning : Solar heat pump systems (SHPs) are systems that combine solar energy and heat pumps. SHPs have been investigated for several decades and have been proven to increase the share of renewable energy and reduce electric energy demand in residential heating applications. LÄS MER