背压式热电联产机组选型的热经济性指标探析
颜晓辉，陈世新，洪蕾
（中国能源建设集团陕西省电力设计院有限公司，陕西 西安 710054）
摘要： 总热效率和热电比是热电联产机组2 个最重要的热经济性指标。对于背压式热电联产机组，单纯依据这2 个
指标进行装机方案比选可能会产生偏差，进而导致背压机组装机方案选择不合理。提出以年平均电热比、热电联产年节
煤量作为背压式热电联产机组热经济性评价辅助指标，以更准确地进行背压机组的选型。
关键词： 背压式发电机组；热经济性指标；热电联产
中图分类号： TK267     文献标识码： A     文章编号： 2095-0802-(2021)06-0060-02
Analysis on Thermal Economy Index of Back-pressure Combined Heat and Power Generation
Unit Selection
YAN Xiaohui, CHEN Shixin, HONG Lei
(Shaanxi Electric Power Design Institute Co., Ltd., China Energy Engineering Group, Xi'an 710054, Shaanxi, China)
Abstract: Overall thermal efficiency and heat-to-electric ratio are the two most important thermal economic indexes of cogeneration
units. For the back-pressure generator set, the comparison and selection of installation plans may cause deviations based on
these two indexes may lead to deviation, which leads to the unreasonable selection of unit types of back-pressure unit. This paper
proposed that the annual average electric-to-heat ratio and coal saving of combined heat and power should be used as auxiliary
indexes for thermal economic evaluation of back-pressure cogeneration units, so as to select back-pressure units more correctly.

Key words: back-pressure generator unit; thermal economy index; combined heat and power generation