350 MW机组热泵供热系统关键可调参数对系统制热能效影响的试验研究  

Experimental Study on the Influence of Key Adjustable Parameters of Heat Pump Heating System on System Heating Efficiency of 350 MW Unit

作　　者：李响 冯征 王恩镇 LI Xiang;FENG Zheng;WANG Enzhen(Guodian Longshan Power Generation Co.,Ltd.,Handan,Hebei 056400,China;Beijing Yuanshen Energy Technology Co.,Ltd.,Beijing 100142,China)

机构地区：[1]国电龙山发电有限责任公司,河北邯郸056400 [2]北京源深能源科技有限责任公司,北京100142

出　　处：《山西电力》2021年第5期62-65,共4页Shanxi Electric Power

摘　　要：利用汽轮机中排抽汽驱动热泵梯级供热系统,实质是提取凝汽器中的循环水余热作为热网循环水的第一级加热,是一种高效节能技术。通过试验,分析了热网循环水量、动力蒸汽压力、机组凝汽器运行背压、主机循环水量等关键可调影响因素对系统制热能效的影响。试验结果表明,对于热泵梯级供热系统,提高余热水量对系统的制热能效影响最大,热网循环水量和机组凝汽器运行背压对系统的制热能效影响次之,热泵驱动蒸汽压力满足热泵系统工作需求即可,对提高系统制热能效影响较小。Using the exhaust steam from the steam turbine to drive the heat pump cascade heating system is,in essence,to use extracted waste heat of circulating water in condenser as the first stage heating of circulating water in the heat supply network,which is a highly efficient energy-saving technology.The influence of key adjustable factors,such as circulating water quantity of heat network,power steam pressure,condenser operating back pressure of the unit,circulating water quantity of main engine and so on,on the heating efficiency of the system is analyzed through experiments.The test results show that for the heat pump cascade heating system,the increase of the amount of waste heat has the greatest impact on the heating efficiency of the system;the circulating water of heat supply network and the condenser operating back pressure of the unit have the secondary impact on the heating efficiency of the system;so long as the driving steam pressure of the heat pump can meet the working requirements of the heat pump system,it has little impact on the improvement of the heating efficiency of the system.

关 键 词：梯级供热 热泵 制热能效 运行方式 

分 类 号：TK115[动力工程及工程热物理—热能工程]