SOLAR DISH/STIRLING POWER SYSTEMS
Cummins Power Generation of Columbus, Indiana.
5 kW free-piston engine dish/Stirling system. The concentrator incorporates 24 stretched-membrane facets (5 feet in diameter). A slight vacuum is drawn between the membranes to obtain an approximately spherical shape.
German/Saudi 50 kW dish/Stirling system
These machines are located at the Solar Village of the Saudi Arabian National center for Science and Technology, near Riyadh. The solar concentrator is a single facet stretched membrane dish 17 mtrs in diameter. The engine used is a 50kW United Stirling 4-275. The max operating temperature is 620 deg C and max gas pressure 2175 psi. Eficiency of 23% solar to electric have been achieved at an insolation of 1000 W/m2.