Pages 422-425
This paper deals with experimental and analytical studies of a heat pump with an aluminum roll-bond type panels (evaporator). A collector efficiency factor of about 0.9 was obtained for the panels from the experimental and analytical results of COP and evaporation temperatures of the heat pump. In order to prevent a large decrease in COP of the heat pump when there was no or a little solar radiation intensity, the panels and an air-refrigerant heat exchanger were used together in parallel and the performance of the heat pump was investigated experimentally and analytically. It was found that the use of the heat exchanger together with the panels was effective for the improvement of the performance of the heat pump. The analytical results agreed with the experimental results.
