Design and optimization analysis of a new double-layer tube type heat exchanger for lead-bismuth reactors

被引:1
作者
Qi, JingWen [1 ,2 ]
Ai, QingSong [1 ,2 ]
Zhao, PengCheng [1 ,2 ]
Yang, Junkang [1 ]
Wang, GuiMei [3 ]
机构
[1] Univ South China, Sch Nucl Sci & Technol, Hengyang, Hunan, Peoples R China
[2] Minist Educ, Key Lab Adv Nucl Energy Design & Safety, Hengyang, Hunan, Peoples R China
[3] China Nucl Ind Huawei Engn Design & Res Co Ltd, Nanjing, Jiangsu, Peoples R China
关键词
gallium-based graphene nanofluids; thermal interface material; double-layer heat exchanger tube; lead-bismuth reactor; optimized design; CONDUCTIVITY; FLOW;
D O I
10.3389/fenrg.2024.1379747
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Double-layer heat tubes have been designed to effectively reduce the occurrence of heat pipe rupture accidents. However, inter-tube thermal contact resistance can decrease heat transfer efficiency, thus hampering the heat dissipation in the primary loop system of lead-bismuth reactors. Therefore, optimizing the design of double-layer heat tubes is necessary. This work focuses on the double-layer heat exchanger of a lead-bismuth reactor and utilizes gallium-based graphene nanofluids as a thermal interface material to fill the gap between the heat tubes. Furthermore, the impact of the length, wall thickness, outer diameter, and spacing of heat tubes on the heat transfer performance of the double-layer heat exchanger with and without the nanofluids has been analyzed. The study aims to optimize the JF factor and cost-effectiveness ratio (CER). Genetic algorithms are employed to optimize and evaluate the heat transfer performance of the main heat exchanger based on the four aforementioned parameters. Consequently, a new design scheme is obtained for the double-layer heat exchanger, which increases the optimized overall heat transfer coefficient of the main heat exchanger by 5.79%, pressure drop in the primary loop by 2.32%, JF factor by 5%, and CER by 24.62%. These results demonstrate that the gallium-based graphene nanofluids can effectively enhance the heat transfer performance of the double-layer heat exchanger while reducing the likelihood of steam generator tube rupture accidents.
引用
收藏
页数:13
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