使用相变材料提高建筑墙体的热惯性

IF 0.5 4区 工程技术 Q4 ENGINEERING, AEROSPACE Thermophysics and Aeromechanics Pub Date : 2024-10-17 DOI:10.1134/S0869864324020070
M. I. Nizovtsev, A. N. Sterlyagov
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引用次数: 0

摘要

我们用数值方法研究了薄层相变材料 (PCM) 对轻质隔热材料建筑外墙热特性的影响。分析了墙内不同位置的 PCM 层的温度和热流密度变化。结果表明,在 100 毫米厚的发泡聚氨酯墙体中使用 4 毫米厚的薄石蜡层,可将夏季墙体内表面的热通量波动幅度降低 2 至 13 倍,具体取决于 PCM 的位置。将 PCM 安装在墙壁中央区域时,可实现最大的减幅。计算显示,在轻质隔热材料建筑的墙壁中使用 PCM 时,会产生积极的效果,即相对于室外空气温度的日最高值,进入室内的最大热通量会延迟 6-8 小时。
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Increasing the thermal inertia of building walls when using phase change materials

The influence of a thin layer of phase change material (PCM) on the thermal characteristics of the outer wall of a building made of lightweight thermal insulation material was studied numerically. Changes in temperature and heat flux density were analyzed for various locations of a PCM layer in the wall. It is shown that the use of a thin paraffin layer 4 mm thick in a wall made of foamed polyurethane 100 mm thick can reduce the amplitude of heat flux fluctuations on the inner surface of the wall in the summer from 2 to 13 times, depending on the PCM location. The greatest reduction is achieved when installing the PCM in the central area of the wall. Calculations show that when using a PCM in the walls of buildings made of light thermal insulation materials, a positive effect, associated with a 6–8 hour delay in the maximum heat flux entering the room relative to the maximum daily value of the outside air temperature, is observed in the summer.

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来源期刊
Thermophysics and Aeromechanics
Thermophysics and Aeromechanics THERMODYNAMICS-MECHANICS
CiteScore
0.90
自引率
40.00%
发文量
29
审稿时长
>12 weeks
期刊介绍: The journal Thermophysics and Aeromechanics publishes original reports, reviews, and discussions on the following topics: hydrogasdynamics, heat and mass transfer, turbulence, means and methods of aero- and thermophysical experiment, physics of low-temperature plasma, and physical and technical problems of energetics. These topics are the prior fields of investigation at the Institute of Thermophysics and the Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences (SB RAS), which are the founders of the journal along with SB RAS. This publication promotes an exchange of information between the researchers of Russia and the international scientific community.
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