带有仿生物蜂窝通道蒸发器的环形热流器的启动调查和传热增强分析

IF 3.5 2区 工程技术 Q1 ENGINEERING, MECHANICAL International Journal of Refrigeration-revue Internationale Du Froid Pub Date : 2024-11-12 DOI:10.1016/j.ijrefrig.2024.11.016
Hainan Zhang , Jing Ding , Haichao Liu , Tao Ding , Yanhui Feng
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引用次数: 0

摘要

环形热流道具有无需外部能量输入的传热能力,在许多领域具有良好的应用潜力。仿生流道是增强传热和优化阻力的一种有效方法,因此是一种很有前途的改善环形热流器性能的方法。但目前该领域的研究还很少。本文通过实验研究了带有仿生蜂窝通道蒸发器的循环热力虹吸器的启动阶段、流动模式和传热性能,并与带有平行流蒸发器的循环热力虹吸器进行了比较。结果表明,启动可分为三个阶段:以热传导为主的阶段、以沸腾为主的阶段和过渡到稳定运行的阶段;在稳态性能方面,随着填充率从 50% 增加到 70%,热阻最小的最佳点的加热功率从 90 W 增加到 150 W;与平行流蒸发器环形热流器相比,仿生蜂窝蒸发器环形热流器的热阻更低。热阻的下降幅度为 4.1 %-21.6 %,在加热功率较小的情况下下降幅度更大。本文提供了一种简单、经济的方法来改善环形热蒸发器的传热性能。
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Start-up investigation and heat transfer enhancement analysis of a loop thermosyphon with biomimetic honeycomb-channel evaporator
Loop thermosyphon has the ability of heat transfer without external energy input, which has good application potential in many areas. Biomimetic flow channel is an effective way for heat transfer enhancement and resistance optimization, therefore it is a promising method to improve the performance of loop thermosyphon. While currently few studies have been conducted in this field. In this paper, the start-up stages, flow patterns and heat transfer performance of a loop thermosyphon with biomimetic honeycomb-channel evaporator are experimentally investigated, and compared with a loop thermosyphon with parallel-flow evaporator. The results show that the start-up of can be divided into three stages: stage dominated by heat conduction, stage dominated by boiling and stage transited to stable operation; For the steady-state performance, the heating power of the optimal point with the lowest thermal resistance increases from 90 W to 150 W with the increase of the filling ratio from 50 % to 70 %; Compared to loop thermosyphon with parallel-flow evaporator, loop thermosyphon with biomimetic honeycomb evaporator has lower thermal resistance. The decline of thermal resistance is 4.1 %–21.6 %, and is more significant under small heating power. This paper provides a simple and affordable method for heat transfer improvement of loop thermosyphon.
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来源期刊
CiteScore
7.30
自引率
12.80%
发文量
363
审稿时长
3.7 months
期刊介绍: The International Journal of Refrigeration is published for the International Institute of Refrigeration (IIR) by Elsevier. It is essential reading for all those wishing to keep abreast of research and industrial news in refrigeration, air conditioning and associated fields. This is particularly important in these times of rapid introduction of alternative refrigerants and the emergence of new technology. The journal has published special issues on alternative refrigerants and novel topics in the field of boiling, condensation, heat pumps, food refrigeration, carbon dioxide, ammonia, hydrocarbons, magnetic refrigeration at room temperature, sorptive cooling, phase change materials and slurries, ejector technology, compressors, and solar cooling. As well as original research papers the International Journal of Refrigeration also includes review articles, papers presented at IIR conferences, short reports and letters describing preliminary results and experimental details, and letters to the Editor on recent areas of discussion and controversy. Other features include forthcoming events, conference reports and book reviews. Papers are published in either English or French with the IIR news section in both languages.
期刊最新文献
Editorial Board Data-enhanced convolutional network based on air conditioning system start/stop time prediction Start-up investigation and heat transfer enhancement analysis of a loop thermosyphon with biomimetic honeycomb-channel evaporator Optimal Intermediate Pressure Investigation in a CO₂ Transcritical Distributed Compression Refrigeration Cycle Thermodynamic and technoeconomic limitations of Brayton refrigeration for air conditioning
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