Dynamic Modeling of a Regenerator for the Control-Based Design of Free-Piston Stirling Engines
نویسندگان
چکیده
This paper describes a new approach to modeling and designing free-piston Stirling engines with the goal of building a working prototype. The Stirling cycle is recast as a dynamic system where control design tools and techniques can be applied to determine optimal manufacturable parameters for the engine. A simplified state-space analysis exhibits the merits of this perspective by revealing a link between pole locations and power production. The results of this analysis suggest the potential of a new, compact free-piston Stirling engine configuration using elastomeric pistons. An engine of this type is described analytically with a physics-based, high-order, lumpedparameter, dynamic model. To support one component of the model, a regenerative heat exchanger is described using a lumped parameter, nth-order model generalizable to an arbitrary number of sections within the regenerator dependent on its physical aspect ratio. Finally, the heat exchanger model is experimentally verified.
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