摘要
计入工质与高、低温侧换热器的热阻损失及压气机和涡轮机中的不可逆压缩和膨胀损失，用有限时间热力学方法导出了恒温热源条件下实际不可逆布雷顿循环功率密度与压比间的解析式，借助于数值计算研究了高、低温侧换热器的最优热导率分配对最大功率密度的影响。
The analytical formulas about the relations between power density and pressure ratio of an irreversible Brayton cycle coupled to constant-temperature heat reservoirs are derived using finite-time thermodynamics in this paper. In the analysis, the irreversibilities involve the heat resistance losses in the hot- and cold-side heat exchangers, and the irreversible compression and expansion losses in the compressor and turbine. The influences of the thermal conductance distribution of hot- and cold-side heat exchangers on the optimal performance of the cycle are studied by detailed numerical examples.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2002年第2期86-89,共4页
Journal of Mechanical Engineering
基金
国家重点基础研究发展规划项目资助(G2000026301)。
