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Year-round Use of Geothermal Energy for Heating and Cooling Buildings – <<

Funding Umweltministerium Baden-Württemberg
Request for Proposal Forschungswettbewerb "Herausforderung Erdwärme"
Supporting Organisation Karlsruher Instituts für Technologie (ehemals Forschungszentrum Karlsruhe)
HFT project director Prof. Dr. habil. Ursula Eicker
Project Staff Maximilian Martin, Dipl.-Ing.(FH) Ruben Pesch
Project partners "Institut für Wasserbau - IWS, Versuchseinrichtung zur Grundwasser- und Altlastensanierung (VEGAS) ? Uni-Stuttgart; Center for Applied Geoscience (ZAG) Eberhard-Karls-University Tuebingen"
Duration 01.09.2009 - 29.02.2012
Project description In the part of this project for which the University of Applied Sciences is responsible, the year-round use of an earth probe system is to be examined with the goal of reducing the total costs by increasing the efficiency and the runtime. In the experiments, a 5 kW ammonia/water diffusion-absorption chiller (DAKM) with two 80m-long earth probes, each with different borehole filling material will be used. This pilot machine will be used in combination with air circulation heaters/air-conditioning units as a chiller in the summer and as a heat pump in the winter to cool/heat a laboratory. The instrumentation already present in the building enables detailed measurements to be taken of the effects of the different applications such as re-cooling, direct cooling and heat pump operation on the fluid mechanics and heat transfer processes in the probes and the resulting energy-abstraction capacity.
Keywords Shallow Geothermics, all-year thermal subsurface usage, Diffusion absorption chiller as reversible heat pump, long-term behavior of probe fields with/withouth grounwater streams