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

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Nuclear Engineering and Design Pub Date : 2025-02-26 DOI:10.1016/j.nucengdes.2025.113942

Xiangyu Fu , Siwei Cai , Guodong Qiu , Jianchuang Sun , Bin Zhao , Qian Li , Weihua Cai

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Abstract

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 LBE- sCO₂ 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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来源期刊

Nuclear Engineering and Design 工程技术-核科学技术

CiteScore

3.40

自引率

11.80%

发文量

377

审稿时长

5 months

期刊介绍： Nuclear Engineering and Design covers the wide range of disciplines involved in the engineering, design, safety and construction of nuclear fission reactors. The Editors welcome papers both on applied and innovative aspects and developments in nuclear science and technology. Fundamentals of Reactor Design include: • Thermal-Hydraulics and Core Physics • Safety Analysis, Risk Assessment (PSA) • Structural and Mechanical Engineering • Materials Science • Fuel Behavior and Design • Structural Plant Design • Engineering of Reactor Components • Experiments Aspects beyond fundamentals of Reactor Design covered: • Accident Mitigation Measures • Reactor Control Systems • Licensing Issues • Safeguard Engineering • Economy of Plants • Reprocessing / Waste Disposal • Applications of Nuclear Energy • Maintenance • Decommissioning Papers on new reactor ideas and developments (Generation IV reactors) such as inherently safe modular HTRs, High Performance LWRs/HWRs and LMFBs/GFR will be considered; Actinide Burners, Accelerator Driven Systems, Energy Amplifiers and other special designs of power and research reactors and their applications are also encouraged.