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研究新型自然对流循环蓄热中空墙体的蓄放热效果,采用自计式传感器连续测试墙体内的温度分布及室内表面的热流量,对该墙体的蓄放热特性进行研究。结果表明:新型墙体内部的温度分布规律与传统的实心墙体构造不同,从内表面至外表面,并不是持续下降的趋势;在晴天白天,内部中空层两侧墙体表面的温度高于相邻实心构造部分,但比中空层空气温度的19.2℃分别低2.2和3.7℃,表明墙体深处处于蓄热状态;清晨温度较低时刻,中空层两侧表面温度分别比其中空气温度的11.7℃高出1.3和0.8℃,表明墙体内部直至清晨仍处于放热阶段。墙体内各点的温度波动幅度显示,晴天中空层两侧表面和空气温度的波动幅度分别可达4.9、4.0和8.2℃,表明墙体内部表面蓄热放热作用显著;阴雪天气下也表现出一定的蓄热放热效果。研究表明,该新型自然对流循环蓄热中空墙体构造可以有效调动墙体深处材料参与蓄热放热过程,显著增加墙体的总蓄热放热面积。
The heat storage and storage effect of a new type of natural convection heat storage hollow wall is studied. The temperature distribution in the wall and the heat flux in the indoor surface are continuously measured by a self-registering sensor, and the heat storage and storage characteristics of the wall are studied. The results show that the temperature distribution inside the new wall is different from that of the traditional solid wall. From the inner surface to the outer surface, the temperature does not decrease continuously. On sunny daytime, the temperature of the wall surface on both sides of the inner hollow layer is higher than Adjacent to the solid structure, but lower than the air layer temperature of 19.2 ℃, respectively, 2.2 and 3.7 ℃, indicating that the wall deep in the heat storage state; early morning temperature is low, the surface temperature of both sides of the hollow layer than the air temperature 11.7 ℃ higher than the 1.3 and 0.8 ℃, indicating that the wall until the early morning is still in the exothermic stage. The temperature fluctuations at various points in the wall show that the fluctuations of the surface and air temperature on both sides of the clear air layer reach 4.9, 4.0 and 8.2 ℃ respectively, indicating that the heat storage and exothermic effect on the internal surface of the wall body is remarkable. Show some heat storage radiating effect. The research shows that the construction of the new natural convection heat storage hollow wall can effectively mobilize the material in the deep wall to participate in the process of heat storage and heat release and significantly increase the total heat storage and discharge area of the wall.