Projects

Sustainable Heating and Cooling with Solar Diffusion-Absorption technology in Connection with the Use of Geothermal Energy <<

Akronym Geothermie
Funding Umweltministerium Baden-Württemberg
Request for Proposal Programm Lebensgrundlage und ihre Sicherung (BW PLUS)
Supporting Organisation Karlsruher Institut für Technologie
HFT project director Prof. Dr. habil. Ursula Eicker
Project Staff Dipl.-Ing. Dietrich Schneider
Project partners keine
Duration 01.07.2006 - 30.04.2010
Project description The goal of this project is the development of a thermally-driven heating and air conditioning unit for buildings that uses solar and geothermal energy. The combination of these technologies makes possible a heating and air conditioning process for buildings that has very low emissions and noise levels and low operating costs. In addition, in comparison to conventional compressor heat pumps, a significant reduction of primary energy usage can be expected along with a subsequent reduction of carbon emissions. The energy-saving solution offered by this project involves the replacement of the conventional electric heat pump by a solely thermally-driven diffusion-absorption heat pump/ chiller (DAHP). The heat required to run the DAHP can be supplied fully by solar collectors in the summer and partially in the winter. The geothermal probes can be extremely beneficial in the summer, as they can cool the building directly or can also be used to expel the heat created by the condenser/absorber at a low temperature, which dramatically improves the efficiency of the thermal chiller. During the winter months, this energy can be drawn out of the ground where is has been stored and used to heat the building. When the DAHP is used as a heat pump, an optimal system combination is obtained. The target capacity range in this project is 3.5 kW of chilling capacity at a COP of 0.5 and 7.5 kW of heating capacity (with a COP of 1.5).
Keywords solar cooling, thermal cooling, geothermal heat rejection, advanced thermal cooling system, system simulation, geothermal simulation