Heat transfer processes in multilayer building structures

The thermal behaviour of rooms and buildings is essentially characterized by the instationary heat transfer behaviour of room enclosing, intransparent building structure (i.e. walls). The paper gives a summarized description of heat transfer processes in single and multilayer building components within the frequency area. Furthermore, the application of a procedure for the approximation of frequency pattern by broken rational functions on the results of the analysis. This approximation guides to mathematical models for the instationary heat transfer behaviour of the nontransparent building components, to be solved easily and directly with the wellknown simulation processes of a digital computer. The process is investigated as to his degree of accuracy and compared with a method using differences. (orig.)