In-Situ Investigation of a Domestic Solar/Heat Pump Heating System in a One Family House
Abstract
A detailed in-situ analysis of a domestic solar/heat pump heating system, combining solar-thermal collectors, heat pump and a ground-coupled water/ice latent heat storage tank is presented. In an industrial joint research project with Ratiotherm Heizung + Solartechnik GmbH & Co. KG, Dollnstein (Germany), a one-family house served as a field-testing building and was equipped with the solar/heat pump system. Using measurement equipment in the system, a detailed scientific investigation was carried out by the CENTRE OF EXCELLENCE FOR RENEWABLE ENERGY RESEARCH at Ingolstadt University. Measurements regarding the overall system performance, the solar system, the heat pump, the buffer storage tank and the latent heat storage tank were carried out. Furthermore, within the analysis the overall system functionality and operational difficulties with a focus on practical operation under field-testing conditions were identified and evaluated, e.g. in hydraulics and supervisory control. Finally, the importance of field tests for -often complex- solar/heat pump heating systems in comparison to standardised laboratory test sequences could be emphasised.