Simulation studies on heat transfer characteristics of PCM micro-encapsulated fluids based on discrete phase model

被引：0
|
作者：
Wu X. [1 ]
Yang Z. [1 ]
Chen Y. [2 ]
Duan Y. [1 ]
机构：
[1] Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Beijing Key Laboratory for CO2 Utilization and Reduction Technology, Tsinghua University, Beijing
[2] Guangdong Province Key Laboratory of Functional Soft Condensate Matter, Guangdong University of Technology, Guangzhou, 510006, Guangdong
来源：
Duan, Yuanyuan (yyduan@tsinghua.edu.cn) | 1600年 / Materials China卷 / 71期
关键词：
CFD; Convective; Heat transfer; Microcapsule; Particle size distribution; Phase change;
D O I：
10.11949/0438-1157.20190964
中图分类号：
学科分类号：
摘要：
Micro-encapsulated phase change material slurry is a new type of heat transfer media which consists of microencapsulated phase change particles and a single-phase heat fluid. Due to the advantages of high coefficient of heat transfer, integration of heat transfer and energy storage, the new media has great development potential. In this paper, we used discrete phase model to numerically analyze the heat transfer characteristics of micro-encapsulated slurry in horizontal circular tube under constant heat flux. The model is verified by comparing with the experimental results. The effects of particle size, mass fraction, phase change latent heat, especially particle distribution on heat transfer were quantitatively analyzed. The results show that as the mass fraction of microcapsules increases, particle size decreases, latent heat of phase change increases, the heat transfer at wall is better. Moreover, the effect of latent heat on wall temperature control and heat transfer is greater than that of particle mass fraction and particle size. The calculation results of the discrete phase model and the commonly used single-phase flow model are compared. It is found that the higher the mass fraction, the higher the degree of particle aggregation, and the greater the deviation of the single-phase flow model. © All Right Reserved.
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页码：1491 / 1501
页数：10
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