基于效率的综合能源系统能效分析模型

摘要

基于热力学第一定律的"能量分析"与基于热力学第一以及第二定律的"火用分析"方法是两种主要的热效率评价方法.以能源互联网能源侧重要组成部分-综合能源系统为研究对象,构建了不同类型综合能源系统能量分析与火用分析数学模型,对北京市亦庄路南区能源互联网项目综合能源系统规划方案进行了能量效率和火用效率计算,得出不同规划方案能源系统与系统子模块的能量效率和火用效率.研究结果表明,不同规划方案的能源系统能量效率为71％～93％,火用效率为34％～40％.对于包含电、冷、热不同形态能源的区域综合能源系统,火用分析方法是评价系统热效率较为有效的方法.%Energy analyses that based on the first law of thermodynamicsand and exergy analyses based on the second one are two major methods to evaluate the thermal effiency. The important part of the energy side of energy internet-integrated energy system was taken as the research object,and the integrated energy system model was presented,which aimed on the energy internet project planning of Yizhuang area in Beijing.The model was devided to several parts that contained three different planning projects to calculate and evaluate the energy efficiency and exergy efficiency of the various energy systems. The results indicate that the overall energy efficiencies are seen to vary,for the three system considered,from 71 to 93 percent,and the exergy efficiencies from 34 to 40 percent,and the exergy analyses is an effective method to evaluate the thermal efficiency of the regional integrated energy system that comprises electricity, cold,heat,different forms of energy.