Optimization and thermodynamic analysis of supercritical CO2 Brayton recompression cycle for various small modular reactors

被引：99

作者：

Park, Joo Hyun ^{[1
]}

Park, Hyun Sun ^{[1
]}

Kwon, Jin Gyu ^{[1
]}

Kim, Tae Ho ^{[2
]}

Kim, Moo Hwan ^{[1
]}

机构：

[1] POSTECH, Div Adv Nucl Engn, Pohang 790784, South Korea

[2] POSTECH, Dept Mech Engn, Pohang 790784, South Korea

来源：

ENERGY | 2018年 / 160卷

关键词：

Supercritical carbon dioxide (S-CO2); Brayton cycle; Cycle optimization; Small modular reactor (SMR); Printed circuit heat exchanger (PCHE); Turbomachinery; COOLED FAST-REACTOR; CIRCUIT HEAT-EXCHANGER; S-SHAPED FINS; POWER CYCLE; GAS-TURBINE; SOLAR POWER; COGENERATION SYSTEM; CONVERSION SYSTEM; RANKINE-CYCLE; ENERGY;

D O I：

10.1016/j.energy.2018.06.155

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper presents optimization of a supercritical carbon dioxide Brayton cycle for three types of 300-MWth small modular reactors (SMRs); a pressurized water reactor (PWR), a sodium-cooled fast reactor (SFR) and a high-temperature gas-cooled reactor (HTGR). The parameters of the pressure ratio and the flow split fraction were examined for sensitivity analysis and optimization of cycle. The optimized cycle efficiencies of PWR, SFR, and HTGR were 30.6%, 46.38%, and 50.04%, respectively. Key components, i.e. turbomachinery and heat exchangers for the SMRs were designed to develop the optimized cycles. The cycle thermal efficiency was improved by using investigating the effects of the channel shape (zigzag, s-shape, airfoil fin) of the printed circuit heat exchangers (PCHEs) on the pressure drop. The study indicated that using airfoil fin type PCHE may increase the cycle thermal efficiency by about 1.0% in comparison with zigzag type PCHE. The effect of turbomachinery efficiencies on the cycle thermal efficiency were investigated. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：520 / 535

页数：16

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