具有非理想气体工质的内可逆Miller循环功率效率特性  

Power and efficiency characteristics of an endoreversible Miller cycle with non-ideal gas working fluid

作　　者：陈茂 戈延林 陈林根 谢志辉[3] 施双双 CHEN Mao;GE Yan-lin;CHEN Lin-gen;XIE Zhi-hui;SHI Shuang-shuang

机构地区：[1]武汉工程大学热科学与动力研究所,湖北武汉430205 [2]武汉工程大学机电工程学院,湖北武汉430205 [3]海军工程大学动力工程学院,湖北武汉430033

出　　处：《节能》2024年第4期48-52,共5页Energy Conservation

基　　金：国家自然科学基金(项目编号:52171317、51779262);武汉工程大学研究生教育创新基金项目(项目编号:CX2022083)。

摘　　要：应用有限时间热力学理论,研究非理想气体工质的内可逆Miller循环的最优性能,导出循环功率和效率与压缩比的一般关系。以循环功率和效率为目标函数,分析Miller循环比γM、传热损失系数B、循环最大温比τ和气体自由度d对循环特性的影响,比较非理想气体与理想气体不同比热模型条件下的性能差异。结果显示:随着γM增加,循环最大功率P_(max)和最大效率η_(_(max))增大,P_(max)对应的效率ηP_(max)先增大后减小,P_(max)对应的压缩比γP减小,η_(_(max))对应的压缩比γη先减小后增大;随着B增大,η_(_(max))、ηP_(max)和γη减小;随着τ和d增加,P_(max)、η_(_(max))、ηP_(max)、γP和γη均增大。比热模型对循环性能仅有定量影响,无定性影响;非理想气体比热模型条件下的循环功率和效率最小。Applying the finite-time thermodynamic theory,the optimal performance of an endoreversible Miller cycle with non-ideal gas working fluid is studied,and the general relationship between cycle power and efficiency and compression ratio is derived.Taking power and efficiency as objective functions,the effects of Miller's cycle ratioγM,heat transfer loss coefficient B,the _(max)imum temperature ratioτ,and freedom degree of monatomic gas d on the cycle characteristics are analyzed,and the cycle performance differences between non-ideal gas and ideal gas under different specific heat models are compared.The results show that,with the increase ofγM,the _(max)imum power P_(max) and the _(max)imum efficiencyη_(max) both increase,the corresponding efficiencyηP_(max) under the P_(max) condition first increases and then decreases,the corresponding compression ratiosγP under the P_(max) condition decreases,and the corresponding compression ratioγηunder theη_(max) condition first decreases and then increases.With the increase of B,η_(max),ηP_(max) andγηall decrease.With the increases ofτand d,P_(max),η_(max),ηP_(max),γP andγηall increase.The specific heat models have no qualitative influence but only quantitative influence on the cycle performances,and the values of P_(max) andη_(max) under the specific heat model of the non-ideal gas condition are the minimum.

关 键 词：内可逆Miller循环 有限时间热力学 非理想气体 功率 效率 

分 类 号：O414[理学—理论物理]