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Overview of free-piston Stirling engine technology for space power applicationAn overview is presented of free-piston Stirling engine activities, directed toward space power applications. One of the major elements of the program is the development of advanced power conversion. Under this program the status of the 25 kWe opposed-piston Space Power Demonstrator Engine (SPDE) is presented. Initial differences between predicted and experimental power outputs and power output influenced by variations in regenerators are discussed. Technology work was conducted on heat-exchanger concepts to minimize the number of joints as well as to enhance the heat transfer in the heater. Design parameters and conceptual design features are also presented for a 25 kWe, single-cylinder free-piston Stirling space power converter. Projections are made for future space power requirements over the next few decades along with a recommendation to consider the use of dynamic power conversion systems, either solar or nuclear. A cursory comparison is presented showing the mass benefits of a Stirling system over a Brayton system for the same peak temperature and output power. A description of a study to investigate the feasibility of scaling a single-cylinder free-piston Stirling space power module to the 150 kWe power range is presented.
Document ID
19880003045
Document Type
Conference Paper
Authors
Slaby, Jack G. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1987
Subject Category
URBAN TECHNOLOGY AND TRANSPORTATION
Report/Patent Number
NASA-TM-88886
E-3295
NAS 1.15:88886
DOE/NASA/1005-12
Funding Number(s)
PROJECT: RTOP 506-41-3A
CONTRACT_GRANT: DE-AI05-82OR-1005
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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