Research on Characteristics and Heating Modes of Heat Pump System

Heat pump can recycle waste heat and improve waste heat utilization rate of thermal power plant. In the design of heat pump, different heating schemes should be selected to match different demands of heating users. In this paper, based on actual heat supply network of a northern city and the thermodynamic system diagram of a 330 MW unit, the change of internal characteristics of the heat pump was analyzed with the variation of supply and return water temperature of the heat supply network. Studies show that the best supply and return water temperature are respectively 45 and 80 . On this basis, the optimal working way ℃℃ was found. For different heat users, reasonable heating scheme should be chosen to maximize the benefits and realize win-win situation of heat and electricity.