贵州省居住建筑复合墙体动态蓄放热特性分析
Dynamic properties of heat storage and release of composite walls in residential buildings of Guizhou Province
摘要：
根据典型气象年数据分析了适宜贵州3个地区的夜间通风时段，应用EnergyPlus软件模拟了外保温外墙的内外壁面温度，通过Matlab编程计算了墙体的节点温度，分析了室外气温周期性变化边界条件下墙体逐时热流密度和逐时蓄热量的变化规律。结果显示：毕节、贵阳、遵义地区的凉爽通风时段分别为17:00至次日10:00，20:00至次日09:00，22:00至次日08:00；在22:00至次日01:00期间，由于外保温层的隔热作用及墙体对温度波的延迟作用，外墙内侧水泥砂浆仍会向室内散热，增大房间的冷负荷。
Abstract：
Investigates the suitable periods for night ventilation on the basis of the typical meteorological year data statistics, simulates the internal and external surface temperatures of an external wall with external thermal insulation by the EnergyPlus software, and calculates the node temperatures of the wall using Matlab. Analyses the change rules of hourly heat flux density and hourly heat storage under boundary conditions of periodic outdoor air temperature. The results show that the suitable periods for night ventilation cooling in Bijie, Guiyang, Zunyi are 17:00 to next 10:00, 20:00 to next 09:00 and 22:00 to next 08:00, respectively. However, in the period of 22:00 to next 01:00, inner cement of the exterior wall still releases heat into the indoor environment which would increase cooling load of the room consequently, due to the effect of insulation and the time lag of external walls.
Keywords:composite wall, residential building, heat storage and release property, ventilation cooling, Guizhou Province, ventilation period, heat flux density, heat storage