为拓宽水蒸气热泵在余热回收中的工作温区，降低水蒸气压缩机的排气温度，对采用喷水降温螺杆压缩机的水蒸气热泵系统及其主要部件建立热力学模型，研究了螺杆压缩机喷水温度，及最佳喷水温度下蒸发温度、冷凝温度对系统性能的影响。结果表明：喷水可以有效降低压缩机排气温度，喷水温度在73~87 ℃之间可保证压缩机运行在报警温度之下；压缩机耗功和冷凝器放热量随喷水温度的升高先增加后降低，在喷水温度为80 ℃时系统性能系数（EER）最佳；最佳喷水温度下，蒸发温度提高，蒸发器吸热量、压缩机耗功、冷凝器放热量及EER增大，压缩机压比降低；冷凝温度提高，压缩机耗功、压比增大，冷凝器放热量和EER降低。

In order to broaden the working temperature range of steam heat pump in waste heat recovery, reduce the exhaust temperature of steam compressor. The thermodynamic model is established for the steam heat pump system and its main components with water spray cooling screw compressor. The effects of the spray water temperature of the screw compressor,the evaporation temperature and the condensation temperature at the optimal spray water temperature on the performance of the system were analyzed.The results show that: Water spray can reduce the compressor exhaust temperature effectively.The water spray temperature between 73~87 ℃ can ensure that the compressor operates below the alarm temperature; The power consumption of the compressor and the condenser heat release of the condenser increase at first and then decrease with the increase of the water spray temperature.EER is best when the water spray temperature is 80 ℃; At the optimal water spray temperature,the evaporation temperature,evaporator heat absorption,compressor power consumption,condenser heat release and EER increase,while the compressor pressure ratio decreases; Condensation temperature,compressor power consumption and pressure ratio increase,while condenser heat release and EER decrease.

TH45

中国标准化研究院院长基金重大项目《资源高效利用标准化技术体系构建和应用》（542019Y-6659）