背压影响热泵回收循环水余热的试验研究  

Test Study on the Effect of Back Pressure on the Recovery of Waste Heat with Heat Pump

作　　者：孙士恩 高新勇 赵明德 

机构地区：[1]华电电力科学研究院,杭州310030

出　　处：《汽轮机技术》2016年第5期373-376,共4页Turbine Technology

基　　金："中国电机工程学会青年人才托举工程"(JLB-2016-122)

摘　　要：通过对利用热泵回收循环水余热的热电厂进行性能试验,并进行了数据处理与分析。结果表明:热泵运行时存在最佳的机组背压,其最佳背压受机组低压缸排汽量和外界热负荷的影响较大;一般情况下,增大余热回收量在一定程度上可以增强热泵系统的性能;当机组的排汽量较小时,机组背压对机组整体的能耗影响较小,可通过提高机组背压来增加余热回收量。The performance test of the thermal power plant using heat pump to recover the waste neat of circulating water is carried out, and the data processing and analysis are carried out. The results show that there is the best back pressure of unit when the heat pump operating,which is major influenced by low pressure cylinder exhaust volume and external heat load. In general, Increasing the amount of waste heat recovery, to a certain extent, can increase the performance of the heat pump system. When the unit＇s exhaust amount is smaller, the back pressure has little effect on the overall energy consumption of unit, and the amount of waste heat recovery can be increased by increasing the hack pressure.

关 键 词：热泵 背压 试验 一次能耗率 

分 类 号：TK26[动力工程及工程热物理—动力机械及工程] TM621[电气工程—电力系统及自动化]