多层多孔介质层间界面处的热质耦合传递  

COUPLED TRANSFER OF HEAT AND MASSS AT INTERFACE OF MULTILAYER POROUS MEDIA

作　　者：孔凡红[1] 

机构地区：[1]中南大学能源科学与工程学院,长沙410075

出　　处：《太阳能学报》2010年第10期1281-1286,共6页Acta Energiae Solaris Sinica

摘　　要：为解决多层多孔介质层间界面处含湿量不连续而使含湿量梯度不能直接作为质传递驱动势的问题,该文在仍然以含湿量梯度为质驱动势的条件下,对界面处的质量和能量守恒方程进行适当改进,使对多层多孔介质热质耦合传递的模拟结果更符合实际,通过对已发表文献的实验结果进行验证,利用验证改进后的模拟方法对新建建筑多层多孔介质围护结构进行模拟,并与以界面处的平均体积含湿量梯度作为质驱动势对模拟结果进行对比。对比结果发现:利用改进后的模拟方法模拟的围护结构干燥速度小于后者的模拟结果,模拟结果也更接近实际情况。The moisture content gradient can not be taken as mass transfer driving force of heat and mass transfr in multilayer porous media due to its discontinuity at interface. To sotve the problem the coupled transfer equations of heat and mass at in- terface were built on the condition of taking moisture content gradient as mass transfer driving force. The equations were veri- fied by experimental results of published reference. Moreover, the simulated result of four layers envelope by the verified model was congared with that of taking average moisture content gradient at interface as mass transfer driving force. The result show that the envelope drying rate of simulated result is smaller than that of the latter, whereas its simulated result is simulated close to truth.

关 键 词：热质耦合传递 层间界面处 含湿量梯度 质驱动势 

分 类 号：TU111.24[建筑科学—建筑理论]