Heat transfer enhancement of latent functional thermal fluid in microchannel with pin fins

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Heat and Mass Transfer Pub Date : 2025-03-10 DOI:10.1016/j.ijheatmasstransfer.2025.126921

Chenzhen Liu , Peng Zhao , Siwen Wang , Peizhao Lyu , Xinjian Liu , Zhonghao Rao

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引用次数: 0

Abstract

In this paper, an experimental investigation was conducted to study the heat transfer and flow characteristics of latent functional thermal fluid (LFTF) in a microchannel liquid-cooling plate with different pin fins (triangular, cylindrical, and cubic). A water-based microencapsulated phase change materials suspension (MPCS) was prepared and used as the LFTF. The effects of mass concentration, Reynolds number, and pin fin structure of microencapsulated phase change material (MicroEPCM) on heat transfer and flow performance of MPCS were investigated. The results indicated that the thermal resistance and heat transfer coefficient of MPCS were significantly better than those of water. Among the three types of pin fin liquid-cooling plates, the cubic pin fin plate has the highest friction factor, while the cylindrical pin fin plate has the lowest friction factor. When the Reynolds number is 400, the comprehensive evaluation coefficients for 2.5 wt% MPCS and 5 wt% MPCS in the cylindrical pin fin liquid-cooling plate were 1.83 and 2.56, respectively. These findings demonstrated that MPCS exhibits higher convective heat transfer performance compared to water. The pin fin structures enhance the comprehensive heat transfer performance of the fluid, with the cylindrical pin fin structure offering the best overall performance. The results presented in this paper would help understanding heat transfer and flow performance of LFTF in microchannel and for designing microchannel liquid-cooling plates.

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本文通过实验研究了潜热功能导热液体（LFTF）在带有不同针状鳍片（三角形、圆柱形和立方体）的微通道液体冷却板中的传热和流动特性。制备了一种水基微胶囊相变材料悬浮液（MPCS），并将其用作潜热功能热流体。研究了微胶囊相变材料（MicroEPCM）的质量浓度、雷诺数和针翅结构对 MPCS 传热和流动性能的影响。结果表明，MPCS 的热阻和传热系数明显优于水。在三种针翅式液冷板中，立方针翅式液冷板的摩擦因数最大，而圆柱针翅式液冷板的摩擦因数最小。当雷诺数为 400 时，2.5 wt% MPCS 和 5 wt% MPCS 在圆柱形针翅式液冷板中的综合评价系数分别为 1.83 和 2.56。这些结果表明，与水相比，MPCS 具有更高的对流传热性能。针翅结构提高了流体的综合传热性能，其中圆柱形针翅结构的综合性能最佳。本文介绍的结果有助于理解微通道中 LFTF 的传热和流动性能，并有助于设计微通道液体冷却板。

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

International Journal of Heat and Mass Transfer 工程技术-工程：机械

CiteScore

10.30

自引率

13.50%

发文量

1319

审稿时长

41 days

期刊介绍： International Journal of Heat and Mass Transfer is the vehicle for the exchange of basic ideas in heat and mass transfer between research workers and engineers throughout the world. It focuses on both analytical and experimental research, with an emphasis on contributions which increase the basic understanding of transfer processes and their application to engineering problems. Topics include: -New methods of measuring and/or correlating transport-property data -Energy engineering -Environmental applications of heat and/or mass transfer