变温热源布雷顿循环的功率密度优化

工程热物理学报 , 2001, 22(2): 151-153.

变温热源布雷顿循环的功率密度优化

陈林根 ^1, , 过增元 ^2, , 郑军林 ^3, , 孙丰瑞 ^4,

1.海军工程大学动力工程学院,清华大学工程力学系,

2.清华大学工程力学系,

3.海军工程大学动力工程学院,

4.海军工程大学动力工程学院,

基金项目: 国家重点基础研究发展计划(973计划)(G2000026301)

关键词：有限时间热力学 , 布雷顿循环 , 功率密度 , 优化

POWER DENSITY OPTIMIZATION OF A BRAYTON CYCLE WITH VARIABLE-TEMPERATURE HEAT RESERVOIRS

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、低温侧换热器的热导率分配和工质与热源间的热容率匹配对最大功率密度的影响。

The analytical formulas about the relations betweenpower density and pressure ratio of an irreversible Brayton cyclecoupled to variable-temperature heat reservoirs are derivedusing finite-time thermodynamics. In the analysis, the irreversibilitiesinvolve the heat resistance losses in the hot- and cold-side heatexchangers, and the irreversible compression and expansion losses in the compressor and turbine. The influences of the thermalconductance distribution of the hot- and cold-side heat exchangersand the thermal capacity rate match between the workingfluid and the heat reservoirs on the maximum power density arestudied by numerical examples.

参考文献

[1]	Sahin B.;Yavuz H.;Kodal A. .EFFICIENCY OF A JOULE-BRAYTON ENGINE AT MAXIMUM POWER DENSITY[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,1995(7):1309-1313.
[2]	Sahin B.;Yilmaz T.;Yavuz H.;Kodal A. .MAXIMUM POWER DENSITY ANALYSIS OF AN IRREVERSIBLE JOULE-BRAYTON ENGINE[J].Journal of Physics, D. Applied Physics: A Europhysics Journal,1996(5):1162-1167.
[3]	Chen Lingen;Wu Chih;Sun Fengrui .Finite Time ThermodynamicOptimization or Entropy Generation Minimization of Energy Systems[J].Journal of Non-Equilibrium Thermodynamics,1999,24(04):327-359.

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