Modellierung von kurzwelliger solarer Strahlung bei der hygrothermischen Bauteilsimulation – numerische Lösung und analytischer Ansatz

Modelling of shortwave solar radiation within the hygrothermal simulation of building envelope parts – numerical solution and analytical approach. This article presents a model for the determination of shortwave solar radiation on building envelope parts, which is – based on measured weather data of direct and diffuse solar radiation on a horizontal surface – suitable to be integrated in computercodes for hygrothermal building part simulation. Therewith, firstly a well‐rounded concept has been worked out, which allows to calculate the radiation flux on any orientated and sloped wall or roof construction at any location taking into account the self‐shading. Furthermore, there is presented an analytical approach for the same problem that is suitable to perform sensitivity analyses with in an easy way. At the end of the article, an example calculation of a wall construction orientated into different directions is presented.