Abstract: Through an analysis on concentrator, receiver and Stirling engine, the functional relationships among each modules were obtained, the energy tranfer model of dish solar thermal power system was built. The simulation and analysis on the performances of dish Stirling system were carried out under different climates conditions by using energy transfer model. The results showed that the engine pressure exhibited linear relationship with the solar direct normal insolation; when the hot-head temperature kept in setting range, the net output power of the system increased with the engine pressure increasing; while the ambient temperature decreased, the Stirling engine efficiency increased and the net output power increased slightly; while the wind speed increased, the receiver efficiency and the net output power increased.

Key words: solar thermal power, net output power, direct normal insolation, simulation, Stirling engine