不同肋骨结构微通道中微胶囊相变浆料传热增强和流动性能的实验研究

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Heat and Mass Transfer Pub Date : 2024-11-14 DOI:10.1016/j.ijheatmasstransfer.2024.126437

Chenzhen Liu , Yibin Bao , Baohuan Li , Peizhao Lyu , Xinjian Liu , Zhonghao Rao

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引用次数: 0

摘要

微胶囊相变浆料（MPCS）具有更高的相变潜热，有望成为微通道冷板的一种有效的新型工作流体。本研究建立了一个实验平台，以研究不同肋片结构的微通道冷板中 MPCS 的传热和流动特性。研究了水和不同质量浓度的 MPCS 在不同入口温度和流速下在直肋微通道结构中的壁温、对流传热和压降特性。在入口温度为 29 °C 时，直肋微通道中 5 wt% 的 MPCS 显著降低了壁面和入口之间的整体温差，与水相比，对流传热性能提高了 8%。MPCS 的压降特性随温度的变化呈现出一定的规律。此外，还研究了 MPCS 和水在三种不同微通道结构（直肋、交错针翅和无交错针翅）中的传热和流动特性。与直肋微通道相比，交错针翅微通道中 5 wt% MPCS 的综合性能提高了 26%。这项研究为微通道中 MPCS 的传热和流动特性提供了理论依据，为微通道热交换器的设计提供了宝贵的支持。

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Experimental study on heat transfer enhancement and flow performance of microencapsulated phase change slurry in microchannel with different rib structures

Microencapsulated phase change slurry (MPCS), with higher phase change latent heat, promises to be an effective new working fluid for microchannel cold plates. In this study, an experimental platform was established to investigate the heat transfer and flow characteristics of MPCS in microchannel cold plates with different rib structures. The wall temperature, convective heat transfer, and pressure drop characteristics of water and MPCS with different mass concentrations at various inlet temperatures and flow rates in straight rib microchannel structures were investigated and at an inlet temperature of 29 °C, 5 wt% MPCS in straight rib microchannels significantly reduced the overall temperature difference between the wall and the inlet, with the convective heat transfer performance improving by up to 8 % compared to water. And the pressure drop characteristics of MPCS exhibited a regular pattern with temperature variation. Additionally, the heat transfer and flow characteristics of MPCS and water were studied in three different microchannel structures: straight ribs, staggered pin fins, and non-staggered pin fins. The comprehensive performance of 5 wt% MPCS in the staggered pin-fin microchannel improved by up to 26 % compared to the straight rib microchannel. This study provides theoretical insights into the heat transfer and flow characteristics of MPCS in microchannels, offering valuable support for the design of microchannel heat exchangers.

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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