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通过对不同厚度(10 mm,15 mm,20 mm)的Na_2CO_3·10H_2O蓄热材料的太阳能混合墙体在830W辐射能量照射下的烟囱效应进行试验,讨论并分析在Na_2CO_3·10H_2O蓄热效应作用下,蓄热材料厚度对蓄热材料两侧温度、烟囱通道出口温度和速度的影响及其对烟囱所诱导的自然通风量的影响。试验结果表明,通道出口空气温度、平均风速以及质量流量均在加热开始后短时间内(大约1 h)升高到某一值继而趋于稳定;蓄热材料厚度越大,空气温度、质量流量以及平均风速均越大;加热停止后,通道内能维持一定空气温度、质量流量以及平均风速,这表明蓄热材料可以有效延长自然通风的时间。
The chimney effect of solar hybrid wall with different thickness (10 mm, 15 mm, 20 mm) of Na_2CO_3 · 10H_2O heat storage material irradiated by 830W radiation energy was tested. The effect of heat storage of Na_2CO_3 · 10H_2O was analyzed and analyzed. Effect of heat storage material thickness on both sides of heat storage materials, outlet temperature and velocity of chimney passage and its influence on natural ventilation induced by chimney. The experimental results show that the outlet air temperature, average wind speed and mass flow rate increase to a certain value and stabilize in a short time (about 1 h) after the start of heating. The greater the thickness of the thermal storage material, the air temperature, the mass flow rate As well as the average wind speed is greater; after the heating is stopped, the channel can maintain a certain air temperature, mass flow rate and average wind speed, indicating that the heat storage material can effectively extend the natural ventilation time.