Heat Pump Systems with Borehole Heat Exchanger and Unglazed PVT-Collector
Abstract
In the future energy supply both efficient heat pump systems for heat generation and photovoltaic (PV) electricity production will play an important role. Therefore, a heat pump system with a combined heat source consisting of a photovoltaic-thermal (PVT) collector and a borehole heat exchanger (BHE) is assumed to be a promising solution, because this particular combination provides a double benefit compared to conventional heat pump and PV-systems. First, the PV cells in the PVT collector are cooled, leading to lower cell temperatures and a higher PV efficiency. Second, the heat from the PVT collector raises the temperature level of the heat pump and the borehole heat exchanger. Consequently, the temperature increase of the heat source leads to a higher heat pump performance factor.