不同工况下的热泵与低真空供热对比分析  

Comparative Analysis of Heat Suppling with Heat Pump and Low Vacuum under Different Working Conditions

作　　者：高新勇 孙士恩 田亚 

机构地区：[1]华电电力科学研究院,杭州310030 [2]中国华电集团公司,北京100031

出　　处：《汽轮机技术》2017年第6期459-462,共4页Turbine Technology

摘　　要：针对热泵与低真空两种不同供热方式,进行变工况与设计工况的对比分析,得出:变工况时,两种供热方式的热电厂一次能耗率与节煤量均随着热网供水温度的增加而增加,且热网供水存在交叉温度值,前者为71℃,后者为75℃;在低于此交叉温度时,热泵供热优于低真空供热;在高于此交叉温度时,低真空供热优于热泵供热。设计工况时,热泵供热方案的初投资明显大于低真空供热;若仅考虑供热期投资回收期,热价在25元以上时,低真空供热方案有一定的优势,在煤价较低时,也有一定的优势;考虑电价时,电价越高,热泵供热方案的优势越明显。The variable condition and design condition are compared and analyzed of two different heating methods which are heat pump and low vacuum. The results are that primary energy consumption rate and save coal of power plant are increasing with the increase of the water supply temperature of heating network, and there are cross temperature of heating network, and the former is 71℃ and the latter is 75℃. When the temperature is lower than cross temperature, the heat pump is better than the low vacuum. And when the temperature is higher than cross temperature, the low vacuum is better than the heat pump. The initial investment of heat pump is obviously higher than that of low vacuum. If considering only the heating period of investment recovery period, when heat price is more than 25 yuan and coal price is lower, Low vacuum is better. And the power price is higher, the advantage of the heat Dump is better.

关 键 词：热泵 低真空 节煤 一次能耗率 经济性 

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]