Optimization criteria of a Bose Brayton heat engine

doi:10.1088/1674-1056/21/1/010505

Abstract 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.

Keywords: irreversibility finite time thermodynamic Bose Brayton engine optimum criterion

Received: 24 April 2011
Revised: 22 July 2011
Accepted manuscript online:

PACS:	05.70.-a	(Thermodynamics)
	07.20.Mc	(Cryogenics; refrigerators, low-temperature detectors, and other low-temperature equipment)
	44.90.+c	(Other topics in heat transfer)

Fund: Project supported by the Program for Excellent Young Teachers Foundation of Shanghai, China (Grant No. thc-20100036).

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Wang Hao (汪浩) and Wu Guo-Xing(吴国兴) Optimization criteria of a Bose Brayton heat engine 2012 Chin. Phys. B 21 010505

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