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Optimization of rhombic drive mechanism used in beta-type Stirling engine based on dimensionless analysis

Chin-Hsiang Cheng and Hang-Suin Yang

Energy, 2014, vol. 64, issue C, 970-978

Abstract: In the present study, optimization of rhombic drive mechanism used in a beta-type Stirling engine is performed based on a dimensionless theoretical model toward maximization of shaft work output. Displacements of the piston and the displacer with the rhombic drive mechanism and variations of volumes and pressure in the chambers of the engine are firstly expressed in dimensionless form. Secondly, Schmidt analysis is incorporated with Senft's shaft work theory to build a dimensionless thermodynamic model, which is employed to yield the dimensionless shaft work. The dimensionless model is verified with experimental data. It is found that the relative error between the experimental and the theoretical data in dimensionless shaft work is lower than 5.2%. This model is also employed to investigate the effects of the influential geometric parameters on the shaft work, and the optimization of these parameters is attempted. Eventually, design charts that help design the optimal geometry of the rhombic drive mechanism are presented in this report.

Keywords: Stirling engine; Rhombic drive; Optimization; Design charts (search for similar items in EconPapers)
Date: 2014
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