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冷热电联产系统的评价准则
引用本文:冯志兵,金红光.冷热电联产系统的评价准则[J].工程热物理学报,2005,26(5):725-728.
作者姓名:冯志兵  金红光
作者单位:1. 中国科学院工程热物理研究所,北京,100080;中国科学院研究生院,北京,100080
2. 中国科学院工程热物理研究所,北京,100080
摘    要:本文通过对以燃气轮机回热循环为动力系统的冷热电联产系统进行热力学分析,对几种常用的评价准则进行了比较。通过分析,认为能量利用系数将冷、热、电等各股能量等价看待,(火用)效率过分看重能量的作功能力,折合发电效率过分关注冷、热能的输出,均不适于冷热电联产系统的评价;节能率反映的是输入能量的使用情况,经济(火用)效率在某种程度上是经济性的表现,比较适于冷热电联产系统的评价。研究中发现,燃气轮机温比有利于系统性能的提高,但针对不同的目标有不同的最佳压比;在节能率的使用中需要明确参照系统的性能。

关 键 词:冷热电联产系统  燃气轮机  回热循环  评价准则
文章编号:0253-231X(2005)05-0725-04
修稿时间:2005年1月7日

PERFORMANCE ASSESSMENT OF COMBINED COOLING, HEATING AND POWER
FENG Zhi-Bing,JIN Hong-Guang.PERFORMANCE ASSESSMENT OF COMBINED COOLING, HEATING AND POWER[J].Journal of Engineering Thermophysics,2005,26(5):725-728.
Authors:FENG Zhi-Bing  JIN Hong-Guang
Abstract:Combined cooling, heating and power (CCHP) system using a recuperative gas turbine is investigated, and performance assessment criteria is discussed. Here, we find that fuel utilization efficiency treats equally different kinds of energies, and the second-law efficiency extremely attends potential for work availability, and efficiency of power generation fulsomely cares heating and cooling, hence they don't suit assessment of CCHP. Fuel energy saving ratio reflects fuel saving compared with traditional energy systems, and economic exergy efficiency could show market demand in some measure, and both could be used for CCHP evaluation. With the increase in temperature ratio of gas turbine, performance of CCHP will be improved, and there are different optimal pressure ratios according to different assessment criteria.
Keywords:combined cooling heating and power  gas turbine  recuperative cycle  performance as-
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