NTRS - NASA Technical Reports Server

Back to Results
Final design of a free-piston hydraulic advanced Stirling conversion systemUnder the US Department of Energy's (DOEs) Solar Thermal Technology Program, Sandia National Laboratories is evaluating heat engines for solar distributed receiver systems. The final design is described of an engineering prototype advanced Stirling conversion system (ASCS) with a free-piston hydraulic engine output capable of delivering about 25 kW of electric power to a utility grid. The free-piston Stirling engine has the potential for a highly reliable engine with long life because it has only a few moving parts, has noncontacting bearings, and can be hermetically sealed. The ASCS is designed to deliver maximum power per year over a range of solar input with a design life of 30 years (60,000 h). The system includes a liquid Nak pool boiler heat transport system and a free-piston Stirling engine with high-pressure hydraulic output, coupled with a bent axis variable displacement hydraulic motor and a rotary induction generator.
Document ID
Document Type
Conference Paper
Wallace, D. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Noble, J. E.
(NASA Lewis Research Center Cleveland, OH, United States)
Emigh, S. G.
(NASA Lewis Research Center Cleveland, OH, United States)
Ross, B. A.
(NASA Lewis Research Center Cleveland, OH, United States)
Lehmann, G. A.
(Stirling Technology Co. Richland, WA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Mechanical Engineering
Meeting Information
IECEC ''91: Intersociety Energy Conversion Engineering Conference(Boston, MA)
Accession Number
Funding Number(s)
Distribution Limits

Available Downloads

There are no available downloads for this record.
No Preview Available