23 September 2011

STUDY OF A BATTERY-FREE PHOTOVOLTAIC HEAT PUMP WITH THERMAL ENERGY STORAGE


A battery-free photovoltaic heat pump powered by solar array directly is presented. The heat pump consists of solar array, DC/DC converter, brushless DC motor, vapor compression heat pump and water tank filled with phase change materials. To analyze the
performance of the heat pump, a detailed model of the system is developed and numerically simulated. From the simulation results, the effects of ambient temperature, solar radiation
and hot water temperature on the performance of the photovoltaic heat pump are shown and analyzed. The model could be used to predict the heating capacity, COP, compressor
variable speed, and system efficiency for a real photovoltaic heat pump operated in various conditions.