THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Hao-Chun Zhang

,

Xiu-Ting Liu

,

Jin Liu

,

Zeng-En Li

CHARACTERISTICS AND OPTIMIZATION OF SCO2 BRAYTON CYCLE SYSTEM FOR HIGH POWER SODIUM-COOLED FAST REACTOR ON MARS

ABSTRACT
Mars is the target of deep space exploration. The first problem of landing on Mars and building a satellite base is the energy source. For more than 50 kW high power demand, space nuclear energy system has the advantages of high output power, large energy density, small area, short working time and so on. Super-critical CO2 Brayton cycle with sodium cooled fast reactor is the most promising power solution because of the high energy conversion efficiency. The thermodynamic model of super-critical CO2 Brayton cycle system with sodium cooled fast reactor as the heat source has been established. After the analysis of circulation process, the relationship between temperature, pressure and enthalpy at working point has been discussed, and the relationship of circulation efficiency has been deduced. The real gas model is used to correct the thermophysical properties of super-critical CO2. The thermal efficiency of the system is analyzed under the typical working condition of Mars surface. What's more, the effects of pressure ratio, compressor inlet temperature, turbine inlet temperature, and the temperature ratio on the cycle efficiency are discussed to get the optimal cycle characteristic and condition parameters.
KEYWORDS
Mars surface, Nuclear power, super-critical CO2 Brayton system, cycle characteristics, optimization
PAPER SUBMITTED: 2021-04-19
PAPER REVISED: 2021-06-18
PAPER ACCEPTED: 2021-07-10
PUBLISHED ONLINE: 2021-12-24
DOI REFERENCE: https://doi.org/10.2298/TSCI2106659Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2021, VOLUME 25, ISSUE Issue 6, PAGES [4659 - 4666]
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Characteristics and optimization of SCO2 Brayton cycle system for high power sodium-cooled fast reactor on Mars

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence