Sökning: "cooling demand"

Visar resultat 1 - 5 av 102 avhandlingar innehållade orden cooling demand.

  1. 1. Optimization of ground-coupled systems for heating and cooling of buildings

    Författare :Jüri Naumov; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; free-cooling; brine temperature; heat pump; ground system; heating demand; storage; building load; cooling demand; Borehole;

    Sammanfattning : The use of ground-coupled systems in commercial buildings offers economic as well as environmental advantages. When both heating and cooling is required, a ground-coupled system can function both as a heat source and a heat sink. At the same time, it can also serve as a short term as well as a seasonal storage. LÄS MER

  3. 2. Heat driven cooling in district energy systems

    Författare :Magnus Rydstrand; KTH; []
    Nyckelord :District heating; district cooling; thermal storage; humidified gas turbines; combined heat and power; cooling;

    Sammanfattning : Abstract The threat of global warming, caused by increasingemissions of carbon dioxide (CO2), is one reason why cooling supply systems mustwork more efficiently in the world today. An increasing share,currently between 10 and 20%, of the global output ofelectricity is consumed to produce cooling. LÄS MER

  4. 3. Effektivisering av pump- och fläktdrifter i byggnader. Elanvändning och systemlösningar

    Författare :Caroline S Markusson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; damper; efficiency; electric energy; authority; demand; control; variable speed; valve; heating; cooling; fans; electric motors; ventilation; pumps;

    Sammanfattning : In this licentiate work the energy savings potential by more efficient pump and fan operation in buildings has been examined. The national savings potential in Sweden has been estimated based on available statistics and on information gained in a limited inventory. The estimated energy use for pump operation in residential and commercial (i.e. LÄS MER

  5. 4. Cooling Demand and Daylight in Commercial Buildings The Influence of Window Design

    Författare :Hendrik Voll; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; daylight; building design; solar factor; glare.; energy need; window share; Commercial buildings; cooling demand;

    Sammanfattning : The modern design of office buildings shows a tendency to increase the window share per facade to be more impressive with grand visibility and well daylit rooms. An increased window share results in general in increased use of energy and costs for cooling, but these disadvantages can be reduced considering a more careful design. LÄS MER

  7. 5. Direct-Ground Cooling Systems for Office Buildings: Design and Control Considerations

    Författare :Taha Arghand; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Borehole; Cooling capacity; Laboratory experiments; Ground heat exchanger; Fluid temperature levels; Control; Direct-ground cooling; Optimization; High temperature cooling;

    Sammanfattning : Direct-ground cooling systems are defined as systems in which the ground is used as the only source for cooling mainly in commercial buildings. These systems benefit from exchanging heat with the ground, of which its temperature is basically constant below a certain depth year around. LÄS MER