Optimization criteria of a Bose Brayton heat engine

An irreversible cycle model of the quantum Bose Brayton engine is established, in which finite-time processes and irreversibilities in two adiabatic processes are taken into account. Based on the model, expressions for the power output and the efficiency are derived. By using a numerical computation...

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Bibliographic Details
Published in:Chinese physics B 2012, Vol.21 (1), p.140-146
Main Author: 汪浩 吴国兴
Format: Article
Language:English
Subjects:
Adiabatic flow
Criteria
Engines
Heat engines
Mathematical models
Numerical analysis
Optimization
Performance enhancement
不可逆性
优化准则
布雷顿
循环模型
热机
玻色
绝热过程
输出功率
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Summary:An irreversible cycle model of the quantum Bose Brayton engine is established, in which finite-time processes and irreversibilities in two adiabatic processes are taken into account. Based on the model, expressions for the power output and the efficiency are derived. By using a numerical computation, the optimal relationship between the power output and the efficiency of an irreversible Bose Brayton engine is obtained. The optimal regions of the power output and the efficiency are determined. It is found that the influences of the irreversibility and the quantum degeneracy on the main performance parameters of the Bose Brayton engine are remarkable. The results obtained in the present paper can provide some new theoretical information for the optimal design and the performance improvement of a real Brayton engine.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/1/010505