A Thermodynamic Design Simulation for Stirling Cycle Machines Using a Lagrangian Formulation
- 1 March 1988
- journal article
- research article
- Published by SAGE Publications in Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
- Vol. 202 (2) , 85-93
- https://doi.org/10.1243/pime_proc_1988_202_093_02
Abstract
This paper describes a one-dimensional simulation of the Stirling cycle machine. A Lagrangian coordinate system is used in conjunction with an implicit solution scheme. The detailed formulation of the conservation equations is set out, including the heat transfer and fluid friction correlations used. The regenerator model includes the use of a spline function to represent the axial temperature distribution. The means of increasing the rate at which the solution attains its final steady state value is outlined. The choice of working fluid subdivision size and number is investigated along with the equation integration time increment. It is shown that optimum values exist for both. Finally, a favourable comparison is made of predicted and experimental results for the pressure-time variations and heat transfers to and from the compression and expansion spaces of a heat pump. The problems of using air as the working fluid are discussed.Keywords
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