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首页> 外文期刊>International journal of numerical methods for heat & fluid flow >Investigation into thermal performance of nanosized phase change material (PCM) in microchannel flow
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Investigation into thermal performance of nanosized phase change material (PCM) in microchannel flow

机译：纳米相变材料（PCM）在微通道流动中的热性能研究

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Purpose - Heat capacity enhancement is important for variety of applications, including microchannel cooling and solar thermal energy conversion. A promising method to enhance heat capacity of a fluid is by introducing phase change particles in a flow system. The purpose of this paper is to investigate heat capacity enhancement in a microchannel flow with the presence of phase change material (PCM) particles. Design/methodology/approach - Discrete phase model (DPM) and homogeneous model have been compared in this study. Water is used as the carrier fluid and lauric acid as the PCM particles with different volume concentrations, ranging from 0 to 10%. Both the models neglect the particle-particle interaction effects of PCM particles. Findings - The DPM indicates that presence of 10% volume concentration of PCM particles does not cause an increase in the pressure drop along the channel length. However, prediction from the homogeneous model shows an increase in the pressure drop due to the addition of nanoparticles in such a way that 10% volume concentration of particles causes 34.4% increase in pressure drop. Research limitations/implications - The study covers only 10% volume concentration of PCM particles;however, the model may be modified to include higher volume concentrations. The laminar flow is considered;it may be extended to study the turbulence effects. Practical implications - This work provides a starting framework for the practical use of different PCM particles, carrier fluid properties, and different particle volume concentrations in electronic cooling applications. Originality/value - The work presented is original and the findings will be very useful for researchers and engineers working in microchannel flow in cooling and thermal storage applications.
机译：目的-提高热容量对于包括微通道冷却和太阳能热转换在内的各种应用都很重要。增强流体的热容量的一种有前途的方法是通过在流动系统中引入相变颗粒。本文的目的是研究存在相变材料（PCM）颗粒的微通道流动中的热容增强。设计/方法/方法-在此研究中比较了离散相模型（DPM）和均质模型。水用作载液，而月桂酸用作PCM颗粒，其体积浓度范围为0％至10％。两种模型都忽略了PCM颗粒的颗粒间相互作用。研究结果-DPM表示PCM颗粒体积浓度为10％不会导致沿通道长度的压降增加。但是，根据均质模型的预测显示，由于添加了纳米颗粒，因此压降增加，使得10％的颗粒体积浓度导致压降增加34.4％。研究的局限性/意义-研究仅涵盖了PCM颗粒体积浓度的10％；但是，可以修改模型以包含更高的体积浓度。考虑了层流；它可以扩展为研究湍流效应。实际意义-这项工作为在电子冷却应用中实际使用不同的PCM颗粒，载液性质和不同的颗粒体积浓度提供了一个起始框架。原创性/价值-所呈现的工作是原创性的，对于研究制冷和储热应用中微通道流动的研究人员和工程师，发现将是非常有用的。

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