Thermal storage performance of double layer composite phase change wall in northwest Sichuan
MA Li
LI Ling
Abstract：The double-layer composite phase change wall has a good temperature regulation and energy storage effect in win-ter and summer,so that the temperature fluctuation of the wall is small,and it has better indoor thermal comfort and building en-ergy saving.The effects of thermal conductivity,water supply temperature and water supply duration on the heat storage perfor-mance of the double-layer composite phase change wall were analyzed by numerical simulation.The results show that the compos-ite phase change wall panel has the effect of delaying indoor temperature fluctuations,and the thermal storage performance of the active double-layer composite phase change wall panel is much higher than that of the passive phase change wall panel.When the maximum outdoor temperature of the experimental room is 29 ℃,the active double-layer composite phase change wallboard low-ers the inner wall surface by about 8 ℃,and the internal wall surface and indoor temperature of the passive phase change wall decrease by about 2 ℃.In summer,the greater the thermal conductivity of the phase change material,the lower the water supply temperature and the longer the duration,the shorter the energy storage time,the greater the heat flux density of the wall,and the lower the temperature.
Keywords：double layered composite phase change wallthermal conductivitywater supply temperaturewater supply dura-tionnumerical simulation
Publication Date：2024-12-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 25-31 )