PROJECT TITLE : 36-Watt Stirling Converter with Reduced Alternator Mass and Innovative Vibration Reduction System
TECHNICAL ABSTRACT (LIMIT 200 WORDS)
Radioisotope Power Systems (RPS) used for deep space exploration and other missions are currently based on thermoelectric conversion technology with typical efficiencies of 6.5 to 9%. The projected increase in efficiency to 23 to 26% for the Stirling system will reduce isotope inventory and potentially lower the mass of the RPS. Stirling Technology Company(STC) projects that an innovative free-piston, linear alternator Stirling converter with the moving components supported by flexural bearings will achieve the projected efficiency and meet other RPS requirements including life and reliability. The heat source for the RPS module will be two General Purpose Heat Source (GPHS) modules with surface temperatures maintained below 1100øC through radiative and/or conductive heat transfer. The converter pressure vessel will protect it from harsh environments, and the flexural bearings will resist damage from shock loading. Innovations include: 1) a proprietary vibration reduction system tailored for use with opposed free-piston Stirling converters, 2) a rugged alternator with minimized mass and advanced cooling techniques, and 3) reduced-mass flexural bearings. Endurance demonstration of a pair of 36-watt Stirling converters, including the regenerator matrix, is key to establishing the viability of this technology both for space and terrestrial applications.POTENTIAL COMMERCIAL APPLICATIONS
The proposed Stirling power system is initially intended for NASA missions. Commercial terrestrial applications identified by Teledyne Brown Engineering include weather stations, acoustic beacons, oceanographic and seismic data collection, navigational aids, pipeline control and communication, pipeline cathodic protection, communication translator/repeaters, and wellhead control systems.NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR
Brad A. Ross, Senior EngineerNAME AND ADDRESS OF OFFEROR
STIRLING TECHNOLOGY COMPANY
4208 West Clearwater Avenue, Kennewick WA 99336-2626
STIRLING TECHNOLOGY COMPANY
4208 West Clearwater Avenue, Kennewick WA 99336-2626