空气层厚度及送风量对相变特朗勃墙性能的影响

Effect ofair layer thickness and air supply on performance of phase change Trump wall

关注华东地区的冬季寒冷气候条件下,相变特朗勃墙体的传热蓄热特性。以济南地区为例,建立相变特朗勃墙体流动及传热数学模型,并利用有限元方法进行求解。通过分析空气层厚度以及空气层入口处送风量的变化探究其对特朗勃相变墙体传热及蓄热性能的影响。数值结果表明,与传统特朗勃墙体相比,改变墙体内部的空气层厚度可使送风速度及温度的均匀度发生变化,空气通道的厚度为100 mm时室内送风温度最高。送风量的变化影响空气的分布均匀性及空气与周围墙体的对流换热,送风量为35 m^(3)/(m^(2)h)时温度分布均匀且室内获得热量最大。

Focuses on the heat transfer and heat storage characteristics of phase change Trump wall under cold winter climate conditions in East China.Takes Jinan area as an example,the mathematical model of phase change Trump wall flow and heat transfer is established and solved by finite element method.By analyzing the change of air layer thickness and air supply at the inlet of the air layer,the influence of heat transfer and heat storage performance of the Trump phase change wall is explored.The numerical results show that compared with the traditional Trump wall,the uniformity of air supply velocity and temperature can be changed by changing the air thickness inside the wall,and the indoor air supply temperature is the highest when the air channel thickness is 100mm.The change of air supply affects the uniformity of air distribution and convective heat transfer between air and surrounding walls.When the air supply is 35 m^(3)/(m^(2)h),the temperature distribution is uniform and the indoor heat is the largest.