中国电力 ›› 2015, Vol. 48 ›› Issue (5): 115-119.DOI: 10.11930.2015.5.115

• 发电 • 上一篇    下一篇

火电机组吸收式热泵的余热回收加热凝补水经济性分析

霍鹏,李千军,郑李坤   

  1. 广东电网有限责任公司电力科学研究院,广东 广州 510080
  • 收稿日期:2015-03-02 出版日期:2015-05-25 发布日期:2015-11-27
  • 作者简介:霍鹏(1973—),山东阳谷人,男,高级工程师,从事汽轮机热力性能试验、运行优化等方面的研究工作。E-mail: 13926034399@139.com

Economic Analysis on Waste Heat Recovery Technique Applied for Make-up Water Heating in the Absorption Heat Pumps of Thermal Power Units

HUO Peng, LI Qianjun, ZHENG Likun   

  1. Electric Power Research Institute of Guangdong Power Grid Corp. Ltd., Guangzhou 510080, China
  • Received:2015-03-02 Online:2015-05-25 Published:2015-11-27

摘要: 因具有从低品质热量中提取高品质热量的特性,吸收式热泵可应用于节能改造方面。但该装置应用于火电厂时,热力系统、驱动热源和余热回收利用引入系统位置等差异,会导致应用效果完全不同。通过分析2种类型机组的余热回收用于本机组凝补水加热的经济性,阐明冷端损失、驱动热源热量品质高低等因素,可能导致余热回收并不能达到节能目的。应用热泵从冷却水的废热中回收部分热量完全用于对外供热,能够提高机组经济性,若用于本机热力系统中,不一定能达到节能的效果。

关键词: 火电机组, 余热回收, 吸收式热泵, 凝补水

Abstract: Characterized by extracting high quality heat from low quality heat, the absorption-type heat pump can be used in retrofit project for energy-saving purposes. However, if the pump is applied in thermal power plants, the differences in thermal systems, driving heat sources and implementation locations of recovered waste heat will yield completely different results. In this paper, through the economic analysis on the waste heat recovery technique which is used to heat up the make-up water in two types of units, it is clarified that waste heat recovery may not achieve the goal of energy saving because of the cold end losses and the quality of the waste heat. When the waste heat recovered from the circulating water by heat pump is completely used to heat up the water of heat-supply network, the thermal efficiency of units can be improved, but when it is only used for the unit itself, it may not fulfill the objective of becoming more energy efficient.

Key words: thermal power unit, waste heat recovery, absorption-type heat pump, make-up water

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