Abstract
Since an integrated system has various components, it is difficult to accurately predict heating and cooling loads of a building and apply an efficient operation method. In this paper, the operation method of a constant flow rate system for efficient system operation of an integrated system based on photovoltaic-thermal and air source heat pump was established and system performance according to flow rate was evaluated. In the case of heating and cooling operation using a heat storage tank in an integrated system, the heat pump COP depended on heat storage load rather than outside temperature. The heat pump COP of the heating operation using a heat pump was dependent on the heating load rather than the outside temperature. In the case of a cooling operation using a heat pump, the heat pump COP decreased as the outside temperature increased despite an increased cooling load. If the pump
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