烧结矿冷却废气余热驱动的ORC系统热力性能研究  

Thermodynamic performance study of ORC system driven by sinter cooling gas waste heat

作　　者：江文豪[1] 冯军胜 赵亮 董辉 方田[1] Jiang Wenhao;Feng Junsheng;Zhao Liang;Dong Hui;Fang Tian(Huatian Engineering and Technology Corporation of MCC;Anhui Jianzhu University;Northeastern University)

机构地区：[1]中冶华天工程技术有限公司 [2]安徽建筑大学环境与能源工程学院 [3]东北大学冶金学院

出　　处：《冶金能源》2023年第6期25-29,33,共6页Energy For Metallurgical Industry

基　　金：安徽省重点研究与开发计划项目(202104a05020015);安徽省高校自然科学研究基金资助项目(2022AH050262)。

摘　　要：将烧结环冷机低温段冷却废气余热引入有机朗肯循环(ORC),建立ORC热力循环过程计算模型,研究混合工质组分、工质蒸发温度和过热度对系统热力性能的影响。研究结果表明:随着工质蒸发温度升高,系统发电功率先增大后减小,而系统火用效率逐渐增大;工质冷凝温度越高,系统发电功率和火用效率均越小;在工质蒸发温度和过热度变化范围内,系统火用效率随混合工质中R245fa质量分数增大先减小后增大,纯工质R245fa的系统火用效率最大。当工质在蒸发器出口为饱和蒸汽时,系统可获得较大系统发电功率,并且混合工质中R245fa质量分数为0.8时的系统发电功率最大。The low-temperature cooling gas waste heat of sinter annular cooler was introduced into the organic Rankine cycle(ORC)for power generation.The calculation model of ORC thermal cycle process was established,and the effects of mixing working medium components,evaporation temperature and superheat degree of working medium on the system thermodynamic performance were studied.The results show that,as the evaporation temperature of working medium increases,the system generated power increases first and then decreases,while the system exergy efficiency gradually increases.The greater the condensation temperature of working medium is,the smaller the system generated power and exergy efficiency are.In the variation range of the evaporation temperature and superheat degree of working medium,the system exergy efficiency decreases first and then increases as the mass fraction of R245fa in mixed working medium increases,the exergy efficiency of pure working medium R245fa is the highest.When the working medium is saturated steam at the evaporator outlet,the ORC system can obtain the larger system generated power,and the R245fa mass fraction of 0.8 in mixed working medium has the largest system generated power.

关 键 词：烧结矿 余热回收 有机朗肯循环 混合工质 热力性能 

分 类 号：TF046.4[冶金工程—冶金物理化学] TK115[动力工程及工程热物理—热能工程]