工质非线性变比热比不可逆Dual-Miller循环生态学目标函数优化  

Ecological objective function optimization of an irreversible Dual-Miller cycle with nonlinear variable specific heat ratio of the working fluid

作　　者：吴志祥[1,2,3] 陈林根[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：《节能》2016年第6期20-27,71,共9页Energy Conservation

基　　金：国家自然科学基金(项目编号:51576207)

摘　　要：考虑工质非线性变比热比特性,存在气缸传热损失、活塞摩擦损失和其他内不可逆性损失,应用有限时间热力学理论分析和优化空气标准Dual-Miller循环性能,推导出了功率、效率和生态学目标函数等性能参数表达式,并由数值计算得到功率和效率与压缩比、功率与效率、生态学目标函数与功率和效率的特性关系,分析升压比和活塞冲程对各性能指标的影响,并分析比较各种不同优化目标下的性能特点。Performance of an air-standard irreversible Dual-Miller cycle with nonlinear variable specific heat ratio of working medium,and with heat transfer loss,piston friction loss and other internal irreversible loss is analyzed and optimized by applying finite time thermodynamic theory.The expressions of the power output,thermal efficiency and ecological objective function are derived.Relationships between the power output and compression ratio,between thermal efficiency and compression ratio,between the power output and thermal efficiency,between the ecological objective function and the power output,as well as between the ecological objective function and thermal efficiency are obtained by numerical examples.The influences of the pressure ratio and the piston stroke on each criterion are analyzed and the performance characteristics with different optimization objective are compared.

关 键 词：有限时间热力学 非线性变比热比 Dual—Miller循环 生态学目标函数 

分 类 号：TK12[动力工程及工程热物理—工程热物理]