The factors that influence the performance of a Wankel compressor mainly include the compression ratio and dimensions (shape factor, eccentric distance, and cylinder height). In this study, theoretical equations are derived to analyze the effect of these factors and carry out a transient simulation of the non-steady-state behavior of a meso-Wankel compressor using a dynamic mesh to support the theoretical equations. The simulation and theoretical results agree well with each other. Cylinder displacement gradually increases with an increasing shape factor, whereas cylinder displacement per unit cross-sectional area gradually decreases. Both the cylinder displacement and cylinder displacement per unit cross-sectional area increase with different eccentric distances, and this growth follows a converse trend. The optimum shape factor is approximately 6 for the Wankel compressor design. On the basis of the design parameters in this article, optimum cooling capacities of 418 and 352 W are obtained from the theoretical and simulation results, respectively. The relative deviation is about 16%.
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