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应用科学学报 ›› 2001, Vol. 19 ›› Issue (3): 268-272.

• 论文 • 上一篇    下一篇

变温热源条件下实际回热式布雷顿循环的功率密度优化

陈林根, 郑军林, 孙丰瑞   

  1. 海军工程大学三系, 湖北武汉 430033
  • 收稿日期:2000-06-01 修回日期:2000-11-01 出版日期:2001-09-30 发布日期:2001-09-30
  • 作者简介:陈林根(1964-),男,浙江海盐人,博士,教授,博导.
  • 基金资助:
    国家重点基础研究发展规划973资助项目(G2000026301)

Power Density Optimization of a Real Regenerated Brayton Cycle Coupled to Variable-temperature Heat Reservoirs

CHEN Lin-gen, ZHENG Jun-lin, SUN Feng-rui   

  1. Faculty 306, Naval University of Engineering, Wuhan 430033, China
  • Received:2000-06-01 Revised:2000-11-01 Online:2001-09-30 Published:2001-09-30

PDF

66

被引次数

3

摘要： 计入工质与高、低温侧换热器和回热器的热阻损失,压气机和涡轮机中的不可逆压缩和膨胀损失及管路系统中的压力损失,用有限时间热力学方法,导出了变温热源条件下实际回热式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、低温侧换热器和回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.

关键词: 布雷顿循环, 功率密度, 回热, 有限时间热力学

Abstract: The analytical formulas for the relations between power density and pressure ratio of a real regenerated Brayton cycle coupled to variable-temperature heat reservoirs are derived by using finite-time thermodynamics. In the analysis, the irreversibilities involve the heat resistance losses in the hot-and cold-side heat exchangers and regenerator, the irreversible compression and expansion losses in the compressor and turbine, and the pressure losses in the piping. The effects of the thermal conductance distribution of hot-and cold-side heat exchangers and of the thermal capacity rate matching between the working fluid and the heat reservoirs on the power density are studied by detail numerical examples.

Key words: regenerated, finite-time thermodynamics, Brayton cycle, power density

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