建筑外墙热惰性对空调冷负荷的影响

IMPACT OF BUILDING OUTSIDE WALL THERMAL INERTIA ON AIR CONDITIONING COOLING LOAD

以重庆地区居住建筑为研究对象,通过改变外墙的外保温材料,在维持外墙传热系数基本不变的条件下,构造9种具有不同蓄热性能的外墙形式。利用eQUEST软件计算了建筑空调冷负荷,分析了在不同空调运行模式下热惰性指标对累计负荷的影响。结果表明:当热惰性指标小于3时,其变化对空调冷负荷影响不明显。热惰性指标和衰减倍数的增大虽然有益于累计冷负荷的减小,但是两参数的影响程度会发生变化。此外,热惰性指标对累计冷负荷的影响还需要考虑不同功能房间在不同时段的热工性能要求。

This article selected the residential building in Chongqing as the research object.By changing the external wall insulation materials,nine kinds of exterior walls had been constructed,which had different heat storage performance but same transfer coefficient.It was calculated the building air conditioning cooling load by the eQUEST software and analyzed the influence of the thermal inertia on the cumulative load under different air conditioning running mode.The results showed that the effect of the thermal inertia index on the air conditioning cooling load was not significant when the thermal inertia index is less than 3.The increase of the thermal inertia index and attenuation multiple was beneficial to the decreasing of the accumulated cooling loads,but the extent of influence of the two parameters was changed.In addition,the effect of the thermal inertia index on the cumulative cooling load also need to consider the thermal performance requirements of different rooms in different times.