Charge Pressure Effects In Kinematic Stirling Engines

ABSTRACT:
Recent work has shown in a general way how the mechanical efficiency of reciprocating kinematic heat engines depends upon the relation between the engine workspace pressure and the external or bufferspace pressure. These results go beyond the intuitive and empirical level of understanding

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of the past and permit a precise evaluation of various schemes to improve engine performance by controlling charge pressure levels in the workspace or bufferspace. This paper applies these results to determine the effects on the performance of Stirling engines when charging the workspace with the buffer pressure fixed. A new general theorem is introduced, proven, and then used to show that the description of charge pressure effects given inthe paper is complete. With this we now have a more thorough understanding of pressurization effects in Stirling engines.

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