Research on heat transfer and flow characteristics of latent functionally thermal fluid in circular tubes with embedded fins

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL

International Journal of Heat and Fluid Flow Pub Date : 2025-07-21 DOI:10.1016/j.ijheatfluidflow.2025.109992

Chenzhen Liu , Peng Zhao , Peng Yang , Peizhao Lyu , Xinjian Liu , Zhonghao Rao

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引用次数: 0

Abstract

In this paper, an experimental investigation was arranged to study the heat transfer and flow characteristics of latent functionally thermal fluid (LFTF) in circular tubes with different fins (smooth tube, straight finned tube, and cross finned tube). The water-based microencapsulated phase change materials suspension (MPCS) as LFTF was prepared. The effects of microencapsulated phase change materials (MicroEPCM) mass concentration, inlet temperature, heat flux, and circular tube structure on heat transfer and flow performance of MPCS were investigated. The results indicated that the convective heat transfer capacity of MPCS was significantly better than that of water under the same experimental conditions. The optimal inlet temperature and heat flux were 29 °C and 4301.48 W/m², respectively. Among the three types of circular tube structures, the cross-fin tube exhibited the best enhanced heat transfer capability but also resulted in the highest pressure drop loss. When the heat exchange section was a smooth circular tube, the comprehensive evaluation coefficients of 5 wt% MPCS and 10 wt% MPCS were approximately 1.3 and 1.5 times higher than that of water, respectively. This demonstrated that MicroEPCM can enhance the overall heat transfer capability. This study investigated the heat transfer and flow characteristics of LFTF in circular tubes, contributing to the expansion of its practical applications electronic device heat dissipation and battery thermal management.

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埋片圆管内潜热功能流体的传热与流动特性研究

本文通过实验研究了不同翅片圆形管（光滑管、直翅片管和交叉翅片管）中潜在功能热流体（LFTF）的传热和流动特性。制备了水基微胶囊化相变材料悬浮液（MPCS）作为LFTF。研究了微胶囊化相变材料（MicroEPCM）的质量浓度、进口温度、热流密度和圆管结构对微胶囊化相变材料传热和流动性能的影响。结果表明，在相同的实验条件下，MPCS的对流换热能力明显优于水。最优入口温度为29℃，热流密度为4301.48 W/m2。在三种圆形管结构中，交叉翅片管的强化传热性能最好，但压降损失也最大。换热截面为光滑圆管时，5 wt% MPCS和10 wt% MPCS的综合评价系数分别约为水的1.3倍和1.5倍。这表明MicroEPCM可以提高整体传热能力。本文研究了圆管内LFTF的传热和流动特性，有助于拓展其在电子器件散热和电池热管理方面的实际应用。

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 Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.