Numerical analysis on the flow and heat transfer characteristics of heat exchanger with cruciform tube

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Annals of Nuclear Energy Pub Date : 2024-08-24 DOI:10.1016/j.anucene.2024.110875

引用次数: 0

Abstract

The heat exchanger (HE) is widely used in energy and power industries, which has a vital impact on the stability and efficient operation of relevant industrial systems. Different shaped heat exchange tubes are often designed specially to improve the thermal–hydraulic efficiency of HEs. In the study, two new geometries named the cruciform twisted tube and cruciform straight tube are introduced, and the heat & mass transfer properties of liquid lead (Pb) and supercritical carbon dioxide (s-CO₂) in the HEs are numerically studied to assess the thermal–hydraulic efficiency and application prospect of two kinds of cruciform tube HEs. The results demonstrate that the unique cross-section geometry of the cruciform tube improves the uniformity of the flow field, and the spiral structure of the cruciform twisted tube effectively improves the blending and turbulence of working fluid. The cruciform tube can improve the comprehensive performance of the HE by more than 12%.

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十字形管热交换器的流动和传热特性数值分析

热交换器（HE）广泛应用于能源和电力行业，对相关工业系统的稳定和高效运行有着至关重要的影响。为了提高热交换器的热液压效率，通常会专门设计不同形状的热交换管。本研究引入了十字形扭曲管和十字形直管这两种新的几何形状，并通过数值研究液态铅（Pb）和超临界二氧化碳（s-CO2）在热交换器中的传热传质特性，以评估两种十字形管式热交换器的热液效率和应用前景。结果表明，十字形管独特的截面几何形状改善了流场的均匀性，十字形扭曲管的螺旋结构有效改善了工作流体的混合和湍流。十字形管可使 HE 的综合性能提高 12% 以上。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.