【摘要】 可呼吸墙体中不仅有热传递,还伴随着湿传递及空气渗透,并且3个过程互相影响,协同作用。在分析国内外相关资料的基础上,采用热力学方法,并根据多孔介质中多相流体流动描述的体积平均方程,建立了热、湿和空气耦合作用下的可呼吸墙体热质传递模型。推导出热、湿和空气耦合传递等效扩散方程;找到可呼吸墙体热、湿及空气耦合作用下热质传递过程的主要影响因素湿容量Lθ、气压pG和温度T;根据等效扩散方程,通过TDM A算法,可以求得可呼吸墙体内的湿容量分布、气压分布和温度分布,并进行了数值模拟。更多还原

【Abstract】 To aim at studying the laws of heat and mass transfer in the respirable walls,developed a coupledunstableequationsystem of the heat,air and moisture transfer in the respirable walls with the third boundary condition.Because equal equation systems are a series of nonlinearity equations,which including differential items,finite difference is adopted to solve the equation systems.The temperature and moisture distribution is given.Our study provides the science theoretic foundation for computation of coupled heat and mass transfer in respirable walls.更多还原