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Low-Temperature
Stirling
Medium-Temperature
Stirling
Heat Storage
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Solar Pumping Systems
Hot-Water Collector
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Low-Temperature Stirling Technology

BSRsolar's low-temperature Stirling engine is powered by unconcentrated solar radiation. The first application is the solar-thermal pumping system SUNPULSE^TM water.

The absorber surface of about 3 square meters converts the solar radiation into heat of about 100°C inside the engine at the hot end whereas the temperature at the cold side is kept at about 30°C. Thus, according to the Law of Carnot, the engine can ideally achieve the efficiency of 19% of which it realizes about 70%, thus achieving an efficiency of 13%.

The displacer moves with a frequency of 0.5 to 1.0 Hz; the pressure inside the engine fluctuates between ± 100 mbar exerting a force of 1,000 kg on the 1 square meter power piston.

For a detailed description of BSRsolar's Stirling technology, please click here.