Optimization study on PCHE channels for lead-bismuth eutectic and supercritical carbon dioxide coupled flow and heat transfer

被引：0
作者：
Fu, Xiangyu [1 ,2 ]
Cai, Siwei [1 ,2 ]
Qiu, Guodong [1 ,2 ]
Sun, Jianchuang [1 ,2 ]
Zhao, Bin [3 ]
Li, Qian [1 ,2 ]
Cai, Weihua [1 ,2 ]
机构：
[1] Northeast Elect Power Univ, Lab Thermofluid Sci & Nucl Engn, Jilin, Peoples R China
[2] Northeast Elect Power Univ, Sch Energy & Power Engn, Jilin, Peoples R China
[3] Changsha Univ Sci & Technol, Coll Energy & Power Engn, Changsha, Peoples R China
来源：
NUCLEAR ENGINEERING AND DESIGN | 2025年 / 435卷
基金：
中国国家自然科学基金;
关键词：
Printed circuit heat exchanger; Intermediate heat exchanger; Lead-bismuth eutectic; Supercritical carbon dioxide; Pressure drop and heat transfer correlation; COOLED FAST-REACTOR; THERMAL-HYDRAULIC PERFORMANCE; CO2; EXCHANGERS; MODELS; ZIGZAG; PIPE;
D O I：
10.1016/j.nucengdes.2025.113942
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
The intermediate heat exchanger (IHX) is a key component in lead-cooled fast reactors (LFRs) between the lead-bismuth eutectic (LBE) loop and supercritical carbon dioxide (sCO2) Brayton cycle. In this paper, the LBEsCO2 flow and heat transfer in printed circuit heat exchanger channels is studied. Firstly, for a typical identical semicircular channel on the hot and cold side, the best hot and cold flow rate ratio in the constraint of design temperature and pressure drop requirements was explored. On this basis, the flow and heat transfer characteristics of different channel patterns were comparatively analyzed. The "rectangle-to-two" channel pattern has the largest heat transfer in per unit volume, which is 176 % greater than the typical identical semicircular channels. Finally, the correlation equations of Nusselt number and Fanning friction factor were established. It provides a basis for the flow and heat transfer calculations and structural optimization design of the LFRs.
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页数：18
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