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Development of a Stirling System Dynamic Model With Enhanced ThermodynamicsThe Stirling Convertor System Dynamic Model developed at NASA Glenn Research Center is a software model developed from first principles that includes the mechanical and mounting dynamics, the thermodynamics, the linear alternator, and the controller of a free-piston Stirling power convertor, along with the end user load. As such it represents the first detailed modeling tool for fully integrated Stirling convertor-based power systems. The thermodynamics of the model were originally a form of the isothermal Stirling cycle. In some situations it may be desirable to improve the accuracy of the Stirling cycle portion of the model. An option under consideration is to enhance the SDM thermodynamics by coupling the model with Gedeon Associates Sage simulation code. The result will be a model that gives a more accurate prediction of the performance and dynamics of the free-piston Stirling convertor. A method of integrating the Sage simulation code with the System Dynamic Model is described. Results of SDM and Sage simulation are compared to test data. Model parameter estimation and model validation are discussed.
Document ID
Document Type
Contractor Report (CR)
Regan, Timothy F.
(Sest, Inc. Middleburgh Heights, OH, United States)
Lewandowski, Edward J.
(Sest, Inc. Middleburgh Heights, OH, United States)
Date Acquired
September 7, 2013
Publication Date
November 1, 2005
Subject Category
Energy Production And Conversion
Report/Patent Number
Meeting Information
Space Technology and Applications International Forum (STAIF-2006)(Albuquerque, NM)
Funding Number(s)
WBS: WBS 22-972-20-01
Distribution Limits
Work of the US Gov. Public Use Permitted.
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