Optimization and thermodynamic analysis of supercritical CO2 Brayton recompression cycle for various small modular reactors
Optimization and thermodynamic analysis of supercritical CO2 Brayton recompression cycle for various small modular reactors
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DOI：
10.1016/j.energy.2018.06.155
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发表时间：
2018-10
期刊：
影响因子：
9
通讯作者：
J. Park;H. Park;J. Kwon;Tae Ho Kim;M. Kim
中科院分区：
文献类型：
--
作者：
J. Park;H. Park;J. Kwon;Tae Ho Kim;M. Kim
本文介绍了超临界二氧化碳布雷顿循环的三种类型的300兆瓦的小型模块化反应堆（SMR）的优化：压水反应堆（PWR），钠冷快堆（SFR）和高温气冷堆（HTGR）。对压比、分流比等参数进行了灵敏度分析和循环优化。PWR、SFR和HTGR的优化循环效率分别为30.6%、46.38%和50.04%。设计了SMR的关键部件，即换热器和热交换器，以开发优化的循环。为了提高循环热效率，研究了印刷电路板换热器（PCHEs）通道形状（锯齿形、S形、翼型翅片）对压降的影响。研究表明，采用翼型翅片PCHE比锯齿形PCHE循环热效率提高1.0%左右。研究了不同的循环效率对循环热效率的影响。
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.