18 May 2017

O.4.8.5 Hardware-in-the-Loop test bench setup and its application to determine seasonal performance of heat pump systems


In this paper we present a Hardware-in-the-Loop (HIL) test bench that is able to manage whole home energy systems (HES) in order to determine their seasonal performance. Previous investigations have shown, that the measured and calculated seasonal coefficient of performance (SCOP) of heat pumps (HP) have a significant deviation. As for the reason to that there are several impacts to name. One would be the non-static behavior of the HP, another the dynamics of heat source (e.g. weather) or the heat sink (e.g. user and building behavior). Finally, the HP controller strategies (e.g. on/off mode, defrosting, source-regeneration) and the act in combination of all HES components (e.g. HP, storage, pumps, etc.). In order to take all these influences into account, an alternative SCOP determination method is introduced. Thus, a HIL test bench is needed to deliver the necessary dynamic data. Besides the technical details and the control strategies of the test bench, the simulation is discussed as well. Finally, the HES installed at the test bench is shown and first results are drawn. These will indicate that the HIL method, the measuring system and the test bench are not only suited but necessary to examine todays and future HES.