回收熔渣余热的空气中冷布雷顿循环的热力学分析  

Thermodynamic analysis of intercooled air Brayton cycle for recovering waste heat of BF slag

作　　者：张泽龙[1,2,3] 陈林根[1,2,3] 王文华[1,2,3] 戈延林[1,2,3] 孙丰瑞[1,2,3] 

机构地区：[1]海军工程大学热科学与动力工程研究室,湖北武汉430033 [2]海军工程大学舰船动力工程军队重点实验室,湖北武汉430033 [3]海军工程大学动力工程学院,湖北武汉430033

出　　处：《钢铁研究》2015年第5期4-8,共5页Research on Iron and Steel

基　　金：国家重点基础研究发展计划973项目(2012CB720405);国家自然科学基金项目(10905693)

摘　　要：为回收利用高炉渣余热,提出了回收熔渣余热的空气中冷布雷顿循环装置,并利用有限时间热力学对该循环装置的余热回收性能进行了研究。通过数值计算,分析了中冷过程、压气机压比和工质质量流率对装置性能的影响,结果表明:中冷过程能增加循环的功率和热回收效率,且存在最佳的工质质量流率和压比,使循环达到最大功率和热回收效率。在装置尺寸约束条件下,优化了压气机进口和涡轮机出口的面积比以及换热器和中冷器的热导率分配比,使循环达到最大功率和热回收效率。To recover waste heat of BF slag,an intercooled air Brayton cycle device was proposed.The heat recovery performance of the cycle was analyzed based on finite time thermodynamics.By numerical calculation,the effects of the intercooled process,the compressor pressure ratio and the mass flow rate on the function of the device were analyzed.The results showed that the intercooled process could improve the cycle＇s power and heat recovery efficiency,and the maximum power and heat recovery efficiency could be obtained by optimizing the mass flow rate and the compressor pressure ratio.Furthermore,in the case of constrain for the total size of the device,the flow area distribution between the compressor inlet and the turbine outlet and the heat conductance distribution between the heat exchanger and the intercooler were optimized and the maximum power and heat recovery efficiency were obtained.

关 键 词：空气布雷顿循环 高炉渣 余热回收 功率 热回收效率 有限时间热力学 

分 类 号：TK12[动力工程及工程热物理—工程热物理]