Cool2Regen – Active cooling of buildings with heat pumps and geothermal probes for high regeneration rates

Geothermal heat pumps are efficient heating systems and therefore they can provide a substantial contribution to the reduction of CO2 emissions of the Swiss building park. In reverse operation mode, they can also cover the increasing cooling demand of buildings. However, the SIA 180 standard asks for passive measures to prevent overheating of buildings, even though active cooling could be covered by large extents with pv-electricity. In this project we analyze, under which conditions active cooling is energetically and economically beneficial, assuming elevated borehole regeneration fractions under consideration of entire districts.