有挑檐的现浇混凝土内置保温系统热工性能分析

Thermal Performance Analysis of Cast-in-place Concrete with Eaves Built-in Insulation System

利用Airpak计算流体力学软件,当室外温度分别为-20℃、-15℃、-10℃,75节能建筑和超低能耗建筑保温结构一体化墙体均采用80 mm厚石墨聚苯板作为保温材料,挑檐处均采用10 mm~25 mm厚的胶粉聚苯颗粒砂浆和真空绝热板作为保温层时,分析两种建筑外墙的温度分布情况并判断其挑檐处是否存在热工缺陷。结果表明:三种室外温度工况下,在实际工程中不建议采用胶粉聚苯颗粒砂浆作为挑檐端部保温材料,对于75节能建筑和超低能耗建筑,建议挑檐端部采用15 mm的真空绝热板作为保温材料。

Using Airpak computational fluid dynamics software,when the outdoor temperature is-20 ℃,-15 ℃,-10 ℃,75 energy saving building and ultra-low energy consumption building insulation structure integration wall are made of 80 mm thick graphite polystyrene board as insulation material. When 10 mm ~ 25 mm thick adhesive polystyrene particle mortar and vacuum insulation board are used as insulation layer in the eaves,the temperature distribution of the two kinds of building external walls is analyzed and whether there are thermal defects in the eaves is determined. The results show that: under the three outdoor temperature conditions, it is not recommended to use rubber powder polystyrene particle mortar as insulation material for eave end in practical engineering. For 75 energysaving buildings and ultra-low energy consumption buildings,it is recommended to use 15 mm vacuum insulation board at the end of eaves as thermal insulation material.