为了减少北方供暖能耗、提高热电厂余热利用效率，构建了亚临界热电联产机组耦合吸收式热泵系统，并实测其性能，详细对比分析亚临界机组在耦合和切除热泵两种运行工况下的经济性。试验表明：热泵机组性能系数（Coefficient of Performance，COP）为1.74，且热泵机组的制热量和回收热量随着循环水温度和驱动蒸汽压力的增大而增加；对于2台330 MW汽轮机组，热泵机组的投入可以增加供热面积166.03万m2；每年节约循环水量47.75万t，煤炭4.03万t，经济效益良好；CO2、SO2和NOx排放量分别减少10.47万t、966 t和281.75 t，节能减排效果显著。

In order to reduce the energy consumption of heating in the north and improve the efficiency of waste heat utilization in thermal power plants,the subcritical cogeneration units coupled with absorption heat pump system were established,which operation performances were studied.Also,the economic benefits of the whole plant under the conditions with and without heat pump were compared detailedly.The research results show that the coefficient of performance (COP) of the overall absorption heat pump unit is 1.74,and the capacity of heat production and recovery increases with the raise of circulating water temperature and driving steam pressure.For the two 330 MW turbine units,when the heat pump unit is put into operation,the heating area of 1 660 300 m2 is added,and the circulating water of 477 500 t and the coal of 40 300 t are saved annually,which have attractive economic benefits.Moreover,the emissions of CO2,SO2 and NOx can be reduced by 104 700 t,966 t and 281.75 t respectively,which have significant environmental benefits.

TM621.3

酒钢集团宏晟电热公司科技项目(2121HS021，2121HS018)