摘要
以南京地区为例,研究与分析了相变通风蓄能砌体南外墙不同构造时,夜间通风风速变化对热响应的影响。结果表明,相变材料置于空心砌块内侧时优于外置,内置时墙体内表面温度波最大振幅仅为外置时的58.3%;构造A与构造B的最佳流速均为2m/s,且墙体内表面温度波最小振幅以及最大延迟系数分别为1.74℃、8h和3.72℃、7h,较之不通风,流入室内热量分别减少了38.2%和29.3%,当量热阻分别增大了115.8%和88.6%。
Taking Nanjing area for example, the effects of variation of night ventilation velocity on thermal response of the south wall of storage block of phase-change-materials （PCMs） with type-A and type-B structures are investigated and analyzed. The results show that PCMs placing in hollow block perform better than that outside. Meanwhile, the maximum amplitude of surface temperature wave in the wall of the former is mere 58.3% Of that outside. The optimal flow velocities of the two structures are all 2m/s, and the minimum amplitudes of surface temperature wave in the wall are respectively 1.74℃ and 3.72℃ ,as well as the retardation coefficients are 8h and 7h. Compared to badly ventilated, influx heats indoor reduce 38.2% and 29.3% while equivalent heat resistances increase 115.8% and 88.6%.
出处
《混凝土与水泥制品》
2015年第5期54-57,共4页
China Concrete and Cement Products
基金
"十二五"国家科技支撑计划资助项目(2011BAE14B06)
关键词
相变蓄热
夜间通风
热响应
Phase change thermal storage
Night yentilation
Thermal response
