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对采用几种典型墙体材料时,建筑房间导热、辐射与自然对流耦合换热问题进行数值研究。计算采用SIMPLE算法、QUICK差分格式。计算结果表明,当室外环境相同时,分别采用灰砂砖砌体、空心砖砌体、聚苯板作为墙体材料,对室内温度及墙体内表面温度影响不同。选择聚苯板作为建筑围护结构的保温材料相对较好。昼夜温差较大的地区,可利用相变材料的蓄热性能,减小房间内的温度波动,提高热舒适度。对于建筑来说,利用墙体蓄热,将白天太阳辐射的一部分热量储存起来,到了夜间再释放出来,可降低白天的空调冷量,达到节能和环保的目的。
When several kinds of typical wall materials are used, the heat transfer, radiation and natural convection heat transfer in building rooms are numerically studied. Calculated using SIMPLE algorithm, QUICK differential format. The calculation results show that when the outdoor environment is the same, they are respectively made of sand-lime brick masonry, hollow brick masonry and polystyrene board as wall materials, which have different influences on the indoor temperature and the inner surface temperature of the wall. Select polystyrene board as the building envelope insulation material is relatively good. Greater temperature difference between day and night areas, the use of phase change material thermal storage performance, reduce the temperature fluctuations in the room, improve thermal comfort. For buildings, the use of wall heat storage, the daytime solar radiation part of the heat stored up, and then released at night, can reduce the air conditioning during the day cold, energy saving and environmental protection purposes.