太阳能余热驱动的混合工质ORC系统性能研究  

Performance study of ORC system with zeotropic mixture drivenby solar waste heat

作　　者：张慧慧 冯军胜 王海涛 ZHANG Huihui;FENG Junsheng;WANG Haitao(School of Engineering,Hefei University of Economics,Hefei Anhui 230031,China;School of Environment and Energy Engineering,Anhui Jianzhu University,Hefei Anhui 230601,China)

机构地区：[1]合肥经济学院工学院,安徽合肥230031 [2]安徽建筑大学环境与能源工程学院,安徽合肥230601

出　　处：《阜阳师范大学学报（自然科学版）》2023年第2期33-39,共7页Journal of Fuyang Normal University:Natural Science

基　　金：安徽省自然科学基金资助项目(1908085QE203);安徽省高校自然科学研究基金资助项目(2022AH050262);安徽建筑大学科研基金项目(2020QDZ02)。

摘　　要：以太阳能集热的导热油为有机朗肯循环系统热源,构建系统热力循环过程的理论计算模型,并选取R245fa和R601a组成系统混合工质,研究不同混合工质组分质量分数条件下工质热力参数对系统循环性能指标的影响。结果表明,系统对外输出净功率随工质蒸发温度的增加先增加后减小,随工质冷凝温度的增加而减小,混合工质中R245fa质量分数为0.8对应的系统对外输出净功率最大。工质蒸发温度越高,冷凝温度越低,系统循环热效率和?效率均越大。相比于混合工质,采用纯工质R601a可获得更大的系统循环热效率,而采用纯工质R245fa可获得更大的系统循环?效率。With the conduction oil of solar heat collection as the heat source of organic Rankine cycle system,the theoretical calculation model of system thermodynamic cycle process was established,and R245fa and R601a were selected as the system zeotropic mixture,the influences of thermal parameters of working medium on the system cycle performance index under different mass fractions of zeotropic mixture were studied.The results show that the system net output power increases first and then decreases with the increase of evaporation temperature,and decreases with the increase of condensation temperature.In the mixed working medium,the system net output power reaches the maximum when the mass fraction of R245fa in zeotropic mixture is 0.8.The higher the evaporation temperature of the working medium and the lower the condensation temperature,the greater the thermal and exothermic efficiency of the system.Compared with the zeotropic mixture,the pure working medium R601a has a greater thermal efficiency,and the pure working medium R245fa has a greater exergic efficiency.

关 键 词：太阳能 余热利用 有机朗肯循环 混合工质 热力性能 

分 类 号：TK519[动力工程及工程热物理—热能工程]