Comprehensive Room Transfer Functions for Efficient Calculation of the Transient Heat Transfer Processes in Buildings

This paper describes a method in which the transfer functions describingheat flow in building elements can be combined into a single tranfer functionfor an enclosure, referred to as a comprehensive room transfer function (CRTF).The method accurately models long-wave radiation exchange and convection in anenclosure through an approximate network, referred to as the ''star'' network.Resistances in the star network are determined from a network that uses viewfactors to model long-wave radiation exchange. The Pade approximation andbilinear transformation are used to reduce the number of coefficients in a CRTF.