The article presents the model for the rehabilitation of existing
conventional thermal power plants in order to lower the consumption of
fossil fuels. Instead of them, the model uses an alternative energy source -
sun irradiation. The proposed rehabilitation model is theoretically
calculated and designed. The model in the software environment Matlab
Simulink was developed, based on previous calculations and determined
parameters. In this article, it is presented the combination of Clausius -
Rankine process and solar central receiver system. The model enables
simultaneous calculations of exit model parameters for the complete model,
based on predetermined entering parameters of the model.