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Free-Piston Stirling Engines - A Progress Report
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1973 by SAE International in United States
Annotation ability available
Event: Fleet Week
The concentric piston-displacer type of free-piston Stirling engine is being developed at Ohio University for use as a gas-fired air conditioner, a long-life isotope powered electric generator, a solar-electric energy converter, a solar water pump, and a simple classroom demonstrator.
A linear alternator-engine combination has demonstrated 8% overall efficiency at a power output of 17 W with 600 K (620°F) heater wall temperature.
A free-cylinder water pump intended for solar energy operation has achieved 6% overall system efficiency using electric heat at 790 K (960°F).
An engine intended for gas-fired air conditioning has reached 1 kW power output and has demonstrated an ability to self-start on application of heat at 370 K (200°F).
Some experiments have been made with condensing working fluids capable of producing power at low heater temperature.
Several design innovations have been made, including a very simple and effective method of preventing piston position creep, and several means of displacer driving.
CitationBeale, W., Holmes, W., Lewis, S., and Cheng, E., "Free-Piston Stirling Engines - A Progress Report," SAE Technical Paper 730647, 1973, https://doi.org/10.4271/730647.
- Beale William T., “Free-Piston Stirling Engines-Some Model Tests and Simulations.” Paper 690230, presented at SAE Automotive Engineering Congress, Detroit, January 1969.
- Beale W., Rauch J., Lewis R., and Mulej D., “Free Cylinder Stirling Engines for Solar Powered Water Pumps.” ASME Paper 71-WA/Sol. 11, 1971.
- Beale W., “A Free-Piston Stirling Engine Driven Inertia Compressor for Gas-Fired Air Conditioning.” Paper presented at AGA-IGT Second Conference on Natural Gas Research and Technology, Atlanta, June 1972.
- Laithwaite and Mamak, “An Oscillating Synchronous Linear Machine.” Proceedings I.E.E., Vol. 109 A (August 1962), p. 415.