首页|Multi-objective optimization and evaluation of supercritical CO2 Brayton cycle for nuclear power generation

Multi-objective optimization and evaluation of supercritical CO2 Brayton cycle for nuclear power generation

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The supercritical CO2 Brayton cycle is considered a promising energy conversion system for Generation IV reactors for its simple layout,compact structure,and high cycle efficiency.Mathematical models of four Brayton cycle layouts are devel-oped in this study for different reactors to reduce the cost and increase the thermohydraulic performance of nuclear power generation to promote the commercialization of nuclear energy.Parametric analysis,multi-objective optimizations,and four decision-making methods are applied to obtain each Brayton scheme's optimal thermohydraulic and economic indexes.Results show that for the same design thermal power scale of reactors,the higher the core's exit temperature,the better the Brayton cycle's thermo-economic performance.Among the four-cycle layouts,the recompression cycle(RC)has the best overall performance,followed by the simple recuperation cycle(SR)and the intercooling cycle(IC),and the worst is the reheating cycle(RH).However,RH has the lowest total cost of investment(Ctot)of $1619.85 million,and IC has the low-est levelized cost of energy(LCOE)of 0.012 $/(kWh).The nuclear Brayton cycle system's overall performance has been improved due to optimization.The performance of the molten salt reactor combined with the intercooling cycle(MSR-IC)scheme has the greatest improvement,with the net output power(Wnet),thermal efficiency ηt,and exergy efficiency(ηe)improved by 8.58％,8.58％,and 11.21％,respectively.The performance of the lead-cooled fast reactor combined with the simple recuperation cycle scheme was optimized to increase Ctot by 27.78％.In comparison,the internal rate of return(IRR)increased by only 7.8％,which is not friendly to investors with limited funds.For the nuclear Brayton cycle,the molten salt reactor combined with the recompression cycle scheme should receive priority,and the gas-cooled fast reactor combined with the reheating cycle scheme should be considered carefully.

Supercritical CO2 Brayton cycleNuclear power generationThermo-economic analysisMulti-objective optimizationDecision-making methods

Guo-Peng Yu、Yong-Feng Cheng、Na Zhang、Ping-Jian Ming

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Sino-French Institute of Nuclear Engineering and Technology,Sun Yat-Sen University,Zhuhai 519082,China

School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China

National Natural Science Foundation of China FundState Key Laboratory of Engines FundJiangxi Provincial Postgraduate Innovation Special Fund

52306033SKLE-K2022-07YC2022-s513

2024

10.1007/s41365-024-01363-y

核技术(英文版)
中国科学院上海应用物理研究所,中国核学会

核技术(英文版)

CSTPCDEI
影响因子：0.667
ISSN：1001-8042
年,卷(期)：2024.35(2)
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