Abstract

By means of a practicable model the hourly values of indoor air temperature and humidity in relation to the external climate, the building parameters (geometry, thermohygric material parameters), the ventilation and the use of the internal space (heat and moisture sources and interior heating system). Three hourly energy- and moisture balances are the key part of the model. The first two equations contain the storage of energy and moisture on the outside surface of the building by climatic loading. Secondly the energy and moisture transport by conduction, radiation and ventilation through the structure and windows has been quantified. In the third place the storage of energy and moisture on the inner surface and furnishing are to formulate.