Description of and experience with the SPsim/ber building simulation programme

A building simulation program has been developed and a model of a standard Swedish single family house has been built up. The model uses an explicit finite-difference method to calculate the temperatures of the next time step. The main output from the programme is energy consumption values and temperatures. The simulation program can either be run as a real time simulation tool (SPsim) or as a pure simulation tool (SPber). The paper is describing the general concept of the models used. It also gives examples of results obtained by using the program.