Thermodynamic analysis of a Brayton cycle system for a space power reactor

doi:10.16511/j.cnki.qhdxxb.2017.22.034

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Abstract The land-use closed Brayton cycle system has high energy conversion efficiencies in a compact configuration. The Brayton cycle can be used in space nuclear plants with some modifications. This paper uses a mathematical model developed using Fortran computer language for a space Brayton cycle system to optimize the working fluid for power conversion units in a space power reactor to improve the design of space power reactors. The results show that xenon reduces the cycle's efficiency and specific power as the xenon mole fraction increases. However, a proper amount of xenon will reduce the enthalpy changes in the turbomachine, which is good for the system's aerodynamics. Helium and xenon have complementary advantages for the system's thermodynamic and aerodynamic performance. By mixing helium working fluid with appropriate amount of xenon, the Brayton cycle system gives better space reactor designs by decreasing the number of compressors and heat exchangers.

Keywords space power reactor Brayton cycle mixture of helium and xenon thermodynamic analysis

ZTFLH:

TL411+.7

Issue Date: 15 May 2017

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	LI Zhi
	YANG Xiaoyong
	WANG Jie
	ZHANG Zuoyi

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LI Zhi,YANG Xiaoyong,WANG Jie, et al. Thermodynamic analysis of a Brayton cycle system for a space power reactor[J]. Journal of Tsinghua University(Science and Technology), 2017, 57(5): 537-543,549.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2017.22.034 OR http://jst.tsinghuajournals.com/EN/Y2017/V57/I5/537

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