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Stirling System Modeling for Space Nuclear Power SystemsA dynamic model of a high-power Stirling convertor has been developed for space nuclear power systems modeling. The model is based on the Component Test Power Convertor (CTPC), a 12.5-kWe free-piston Stirling convertor. The model includes the fluid heat source, the Stirling convertor, output power, and heat rejection. The Stirling convertor model includes the Stirling cycle thermodynamics, heat flow, mechanical mass-spring damper systems, and the linear alternator. The model was validated against test data. Both nonlinear and linear versions of the model were developed. The linear version algebraically couples two separate linear dynamic models; one model of the Stirling cycle and one model of the thermal system, through the pressure factors. Future possible uses of the Stirling system dynamic model are discussed. A pair of commercially available 1-kWe Stirling convertors is being purchased by NASA Glenn Research Center. The specifications of those convertors may eventually be incorporated into the dynamic model and analysis compared to the convertor test data. Subsequent potential testing could include integrating the convertors into a pumped liquid metal hot-end interface. This test would provide more data for comparison to the dynamic model analysis.
Document ID
Document Type
Conference Paper
Lewandowski, Edward J.
(Sest, Inc. Middleburgh Heights, OH, United States)
Johnson, Paul K.
(Analex Corp. Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
June 1, 2008
Subject Category
Mechanical Engineering
Report/Patent Number
SNC-Paper- 2056
Meeting Information
Space Nuclear Conference 2007 (SNC ''07)(Boston, MA)
Funding Number(s)
WBS: WBS 138494.04.01.01
Distribution Limits
Work of the US Gov. Public Use Permitted.
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