基于[火用]分析的能量梯级利用供热变工况运行优化研究

Research on Operation Optimization of Energy Cascade Utilization Heating Based on Exergy Analysis

为了实现能量梯级利用,实现供热机组的变工况优化,建立了基于[火用]分析的供热经济性评价模型,研究了全厂[火用]效率、供热[火用]指数以及发电煤耗和供热煤耗的变化情况;基于热力系统集成优化软件搭建了仿真模型,研究了高背压供热机组的高低旁抽汽供热、高低旁抽汽-背压机供热、中排抽汽供热及中排抽汽-背压机供热变工况运行的经济性,结果表明:中排抽汽-背压机供热方式的最佳[火用]效率、[火用]指数、发电煤耗及供热煤耗指标均优于其他供热方式;基于[火用]分析方法得到的供热煤耗能够评价不同供热方式的经济性。研究结果可为能量梯级利用供热变工况运行优化提供支撑。

In order to realize the optimization of energy cascade heating unit,An analysis-based evaluation model of heating economy is established,Got the whole plant efficiency,the heating index,And power generation coal consumption and heating coal consumption based on analysis;The simulation model built based on the thermal system integration and optimization software,This paper studies the operation economy of high back pressure heating unit,high and low side steam extraction-back pressure heating,middle exhaust steam heating and middle exhaust steam extraction-back pressure heating,The results show that the best efficiency,index,power generation coal consumption and heating coal consumption index of middle exhaust steam-back compressor are better than other heating modes;Based on the analysis method,the heating coal consumption can be the economy of different energy heating modes.The research results provide support for the operation optimization of energy cascade using heating transformer condition.