Calculation Model of Comprehensive Heat Transfer Coefficient of Glazing Doubleskin Faade in Summer Working Condition

Abstract:

A trunk glazing doubleskin faade applicable to the summer hot and winter cold is selected as the research object.An analysis is made of the mechanism of heat transfer and energy balance equations are obtained.At the same time,formulas for calculating total absorption rate of each faade and equivalent radiative coefficient in each energy balance equation.Air average flow velocity in ventilation cavity is obtained by computational fluid dynamics(CFD) simulation method.Finally in combination with the mechanism of heat transfer,formulas for calculating comprehensive coefficient K of heat transfer are put forward on the basis of an anlysis of the total heat resistance of DSF

Key words:glazing doubleskin faade; comprehensive coefficient of heat transfer; ventilation cavity; energy balance equation