Simulation of solar-systems using a general purpose minicomputer

As a new program-package for the simulation of solar- and heat pump-installations, preferably with liquid heat carrier, REALSUN 6.2 is presented, whereby the precise simulation makes not only possible to investigate the influence of size and properties of components as i.e. collectors and storage tanks, but also the effects of control-parameters. The simulation is operating extremely fast, it takes 15 minutes for the simulation of a 1 year period on a conventional minicomputer with REALSUN 6.2 compared to 900 minutes on an IBM 360 simulating with TRNSYS for a comparable solar installation. The simulation with REALSUN 6.2 can be interactively, synchronically and asynchronically controlled by man and can be observed on a standard CRT in a graphic form.