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
陈茂 1戈延林 1陈林根 1谢志辉 2施双双1
作者信息
- 1. 武汉工程大学 热科学与动力研究所,湖北 武汉 430205;武汉工程大学机电工程学院,湖北 武汉 430205
- 2. 海军工程大学动力工程学院,湖北 武汉 430033
- 折叠
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Pmax和最大效率ηmax增大,Pmax对应的效率ηPmax先增大后减小,Pmax对应的压缩比γP减小,ηmax对应的压缩比γη先减小后增大;随着B增大,ηmax、ηPmax和γη减小;随着τ和d增加,Pmax、ηmax、ηPmax、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.
Abstract
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 ratio γM,heat transfer loss coefficient B,the maximum temperature ratio τ,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 of γM,the maximum power Pmax and the maximum efficiency ηmax both increase,the corresponding efficiency ηPmax under the Pmax condition first increases and then decreases,the corresponding compression ratios γP under the Pmax condition decreases,and the corresponding compression ratio γη under the ηmax condition first decreases and then increases.With the increase of B,ηmax,ηPmax and γη all decrease.With the increases of τ and d,Pmax,ηmax,ηPmax,γP and γη all increase.The specific heat models have no qualitative influence but only quantitative influence on the cycle performances,and the values of Pmax and ηmax 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Key words
endoreversible Miller cycle/finite time thermodynamics/non-ideal gas/power/efficiency引用本文复制引用
基金项目
国家自然科学基金(52171317)
国家自然科学基金(51779262)
武汉工程大学研究生教育创新基金(CX2022083)
出版年
2024
国家科技期刊平台
NSTL
万方数据