Research on Calculation Method of Comprehensive Heat Transfer Coefficient of Glazing Double-skin Façade

Abstract:

This article firstly introduces various kind of glazing double-skin façade and models a trunk façade which is applicable to be used in summer hot and winter cold district as research object.Then analyzes the mechanism of heat transfer and establishes energy balance equations.At the same time,presents formular for calculating total absorption rate of each façade and equivalent radiative coefficient in each energy balance equation. Air average flow velocity in ventilation cavity is obtained by CFD simulation method. Sequentially, puts forward formular for calculating comprehensive coefficient K of heat transfer after analyzing the total heat resistance of DSF combined the mechanism of heat transfer.What have done in this paper will provide reference basis for air-conditioning system design of DSF building.