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| 变温热源布雷顿循环的功率密度优化 | |
| 引用本文： | 陈林根,过增元,郑军林,孙丰瑞. 变温热源布雷顿循环的功率密度优化[J]. 工程热物理学报, 2001, 22(2): 151-153 |
| 作者姓名： | 陈林根 过增元 郑军林 孙丰瑞 |
| 作者单位： | 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, |
| 基金项目： | 国家重点基础研究发展规划项目!（No．G2000026301） |
| 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。 |
| 关 键 词： | 有限时间热力学 布雷顿循环 功率密度 优化 |
| 文章编号： | 0253-231X(2001)02-0151-03 |
| 修稿时间： | 2000-12-15 |
POWER DENSITY OPTIMIZATION OF A BRAYTON CYCLE WITH VARIABLE-TEMPERATURE HEAT RESERVOIRS |
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| CHEN Lin-Gen,ZHENG Jun-Lin,SUN Feng-Rui,GUO Zeng-Yuan. POWER DENSITY OPTIMIZATION OF A BRAYTON CYCLE WITH VARIABLE-TEMPERATURE HEAT RESERVOIRS[J]. Journal of Engineering Thermophysics, 2001, 22(2): 151-153 | |
| Authors: | CHEN Lin-Gen ZHENG Jun-Lin SUN Feng-Rui GUO Zeng-Yuan |
| Abstract: | The analytical formulas about the relations between power density and pressure ratio of an irreversible Brayton cycle coupled to variable-temperature heat reservoirs are derived using finite-time thermodynamics. 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 the hot- and cold-side heat exchangers and the thermal capacity rate match between the working fluid and the heat reservoirs on the maximum power density are studied by numerical examples. |
| Keywords: | finite-time thermodynamics Brayton cycle power density optimization |
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