摘要
双层复合相变墙体对冬夏两季都有较好的调温储能作用,使墙体温度波动小,有较好的室内热舒适性和建筑节能性。通过数值模拟分析了相变材料导热系数、供水温度、供水时长对双层复合相变墙体蓄热性能的影响。结果表明:复合相变墙板具有延后室内温度波动的效果,主动式双层复合相变墙体蓄热性能远高于被动式相变墙板,当试验房室外最高温度为29℃时,主动式双层复合相变墙板使墙体内壁面温度降低8℃左右,被动式相变墙体内壁面和室内温度降低2℃左右。夏季工况条件下,当相变材料的导热系数增大、供水温度降低、供水时长延长时,蓄能时间越短,墙面热流密度越大,温度也越低。
The double-layer composite phase change wall has a good temperature regulation and energy storage effect in winter and summer,so that the temperature fluctuation of the wall is small,and it has better indoor thermal comfort and building energy saving.The effects of thermal conductivity,water supply temperature and water supply duration on the heat storage performance of the double-layer composite phase change wall were analyzed by numerical simulation.The results show that the composite 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 lowers 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.
作者
马立
李玲
MA Li;LI Ling(School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)
出处
《新型建筑材料》
2024年第12期25-31,共7页
New Building Materials
关键词
双层复合相变墙体
导热系数
供水温度
供水时长
数值模拟
double layered composite phase change wall
thermal conductivity
water supply temperature
water supply duration
numerical simulation
作者简介
马立,男,1969年生,博士,教授,研究方向:建筑材料与建筑节能,E-mail:909992489@qq.com;通讯作者:李玲,硕士研究生,E-mail:1636815265@qq.com。
