热力透平2026，Vol.55Issue(2)：91-96,122,7.DOI:10.13707/j.cnki.31-1922/th.2026.02.002
衡量背压式热电联产热经济性的改进式热量分析法
Improved Heat Balance Method for Thermal-Economy Evaluation of Back-Pressure Combined Heat and Power System
杨红霞 1张星1
作者信息
- 1. 上海汽轮机厂有限公司,上海 200240
- 折叠
摘要
Abstract
With the increase of requirements for energy conservation and consumption reduction,back-pressure combined heat and power(CHP)systems have developed rapidly.To clarify and unify the indicators characterizing the thermo-economy of back-pressure CHP,investigation was carried out for its thermodynamic performance based on heat balance method.The heat rate was selected as the evaluation indicator and was applied to various cases of pure condensing power generation,and the rationality of this indicator,along with its defects and irrationalities when evaluating the thermo-economy of back-pressure CHP,was analyzed comparatively.Subsequently,an improved heat balance method was employed to compare different CHP schemes.The results indicate that for pure condensing generation units,the heat rate decreases with the improvement of steam inlet parameters and the adoption of single or double reheat cycles,however,the heat rate fails to accurately reflect the performance improvement in back-pressure CHP systems resulting from enhanced steam inlet parameters and improved turbine cylinder efficiency.In contrast,for back-pressure CHP units,the heat rates calculated using equivalent power method and saturated enthalpy method can effectively demonstrate the improvement of energy utilization levels attributable to parameter enhancements and increased turbine efficiency.These findings can provide reference for thermo-economic evaluation,indicator selection and design optimization of back-pressure CHP units.关键词
背压式/热电联产/热耗率/等效功率法/饱和焓值法Key words
back-pressure/combined heat and power/heat rate equivalent power method/saturated enthalpy method分类
信息技术与安全科学引用本文复制引用
杨红霞,张星..衡量背压式热电联产热经济性的改进式热量分析法[J].热力透平,2026,55(2):91-96,122,7.
