A seawater source heat pump district heating system analysis of the actual measurement in Dalian

According to the measured data, the paper analyzes the heat pump units and the whole efficiency of the heat pump district heating system. The results show that sea water source heat pump units in the case of low temperature of seawater in winter can still running, but the heating coefficient of performance of the unit is low (about 2.43), the heating coefficient of performance of the system as a whole are even more low (average 1.86). Further analysis of the influence factors of conditioning unit. Simulation calculation, found that if choose good performance of heat pump units on the market, the heating coefficient of performance will increase 34.2%, overall system efficiency can increase about 24.2%.