An important factor affecting the thermal insulation of aerated concrete equipment
December 04, 2021
As for the thermal insulation performance of aerated concrete equipment, if air conditioning is installed indoors in summer, the wall faces unstable heat transfer, indoor thermal insulation and thermal insulation need to be considered separately. At this time, the main indexes affecting thermal insulation are temperature conductivity and surface heat storage coefficient.
An important factor affecting the thermal insulation of aerated concrete equipment is the surface heat storage coefficient. The surface heat storage coefficient of aerated concrete block is 1.65-2.37, while that of clay masonry is 8.3 and that of ordinary concrete is 12.85, which is much higher than that of aerated concrete block. The small surface heat storage coefficient of aerated concrete block indicates that the layer has poor resistance to temperature fluctuation, that is, the external surface temperature of aerated concrete equipment products is relatively high under the same outdoor conditions; Similarly, the inner surface temperature is also vulnerable to indoor temperature fluctuations, and the thermal stability of the surface layer is poor. The thermal conductivity of aerated concrete equipment products is very small. It has a strong ability to prevent the transmission of heat flow and temperature wave. The heat flow through the aerated concrete maintenance structure is small, the attenuation multiple is large, and the delay time is long.
Compared with traditional materials, the average temperature and fluctuation temperature of the inner surface of aerated concrete are small under the condition of the same thickness. Another index affecting the wall insulation performance of aerated concrete equipment products is that for the thermal insulation requirements in summer, the benign influence of thermal conductivity is the main, and the negative influence of surface heat storage coefficient is the secondary.
Therefore, as a result of comprehensive action, for buildings that do not use air conditioning and rely on natural cooling, the thermal insulation performance of aerated concrete is still slightly better than that of traditional building materials such as traditional clay brick and ordinary concrete.