TY - JOUR
TI - Thermal performance experiment and numerical simulation of micro-PCM cement mortar composite wall
AU - Liang Mei
JN - Thermal Science
PY - 2023
VL - 27
IS - 4
SP - 3013
EP - 3028
PT - Article
AB - In order to reduce the heat transfer between indoor and outdoor environments  and reduce the influence of outdoor ambient temperature fluctuation on the  indoor environment, adding micro-PCM to the building envelope is one of the  effective means. Micro-PCM can "intelligently" control temperature by  absorbing or releasing heat during phase change to maintain temperature  stability. In this paper, the phase change temperature-adjustable mortar was  prepared by using micro-PCM with a phase change temperature of 25°C, and  was painted on the surface of cement wallboard (300 × 100 mm) to form a  phase change thermostatic mortar layer with a cross-section size of 300 × 20  mm. The solar radiation on the outer surface of the building envelope was  simulated by an incandescent lamp. The influence of micro-PCM on the  temperature control performance of cement wallboard was tested. The thermal  performance of the PCM wallboard was simulated by COMSOL software. Results  show that compared with ordinary cement wallboard, when the micro-PCM  content is 40%, the maximum temperature of the inner wall can be reduced by  5.17°C, and the time to reach the maximum temperature is delayed by 145  minutes. The temperature fluctuation amplitude of the inner wall is reduced  by 1.90°C, and the maximum instantaneous heat transfer is reduced by 22.202  W/m2.