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Author:

Bai, Lu (Bai, Lu.) | Xie, Jingchao (Xie, Jingchao.) (Scholars:谢静超) | Farid, Mohammed M. (Farid, Mohammed M..) | Wang, Wei (Wang, Wei.) (Scholars:王伟) | Liu, Jiaping (Liu, Jiaping.) (Scholars:刘加平)

Indexed by:

EI Scopus SCIE

Abstract:

Integrating phase change materials (PCMs) into building envelopes can improve the heat storage ability of buildings and prevent overheating when the outdoor air temperature and solar radiation are high. However, simply adding a PCM to a building does not ensure that the temperature of a room can be controlled; hence, a suitable design method is necessary. Nevertheless, the heat storage mechanism of PCM envelopes is very complicated because it is affected by several factors, including the climate, building parameters, and the properties of the PCM employed. This study develops a mathematical model for passive buildings, and the factors affecting the heat storage process of PCM envelopes in summer are analyzed to determine an efficient method to control the temperature of the room with PCMs. A theoretical analysis demonstrates that PCMs reduce the indoor temperature, but not the average room temperature. The effectiveness of PCMs in buildings is influenced by both climate and building parameters. If the average outdoor air temperature is higher than the boundary of the humans' comfort level, overheating will occur even when using PCMs. Before using PCMs, the average room temperature should be calculated and previewed using the proposed theoretical model. If the effectiveness of PCM is limited, the average room temperature is reduced via ventilation.

Keyword:

Mathematical model Phase change material Passive building Room temperature

Author Community:

  • [ 1 ] [Bai, Lu]Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China
  • [ 2 ] [Xie, Jingchao]Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China
  • [ 3 ] [Wang, Wei]Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China
  • [ 4 ] [Liu, Jiaping]Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China
  • [ 5 ] [Farid, Mohammed M.]Univ Auckland, Dept Chem & Mat Engn, Auckland 92019, New Zealand

Reprint Author's Address:

  • 谢静超

    [Xie, Jingchao]Beijing Univ Technol, Key Lab Green Built Environm & Energy Efficient T, Beijing 100124, Peoples R China

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Source :

BUILDING AND ENVIRONMENT

ISSN: 0360-1323

Year: 2020

Volume: 169

7 . 4 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:115

Cited Count:

WoS CC Cited Count: 23

SCOPUS Cited Count: 28

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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