NUMERICAL SIMULATIONS ON THERMAL PERFORMANCES OF PASSIVE SOLAR VENTILATED WALLS WITH LATENT HEAT STORAGE IN WINTER

被引：0
|
作者：
Chen J. [1 ]
Kang X. [1 ,2 ]
机构：
[1] School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan
[2] Hubei Green and Intelligent Building Engineering Technology Research Center, Wuhan
来源：
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 04期
关键词：
enthalpy porosity method; numerical simulation; passive solar buildings; phase change materials; ventilated wall;
D O I：
10.19912/j.0254-0096.tynxb.2021-1545
中图分类号：
学科分类号：
摘要：
Adding phase change materials (PCMs) to building ventilation wall is considered to be an effective means to improve its thermal performance in winter. PCMs can be packaged macroscopically in the wall by the method of block. At this time, the phenomenon of natural convection generated in the melting process of materials is very significant and cannot be ignored. In this paper，thermal performances of passive solar ventilation walls with latent heat storage are studied，by using the numerical solver developed based on the open- source CFD framework OpenFOAM. Physical processes of heat transfer，flow dynamics, and phase change of materials are accurately predicted. The results show that the thermal storage wall of PCMs can effectively reduce the fluctuation of indoor temperature. In addition，natural convection in the PCMs greatly affects the melting and solidification rate of materials. Therefore, the length-to-width ratios of PCMs and its blocking-arrangements should be carefully selected. © 2023 Science Press. All rights reserved.
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页码：522 / 530
页数：8
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