Abstract
The evaluation of a newly designed oil-free rotary compressor is presented based on transient 3D Computational Fluid Dynamics (CFD) simulations. The simulations are performed at low compression ratios and low pressure ratios and low rotational speeds. To place the results into context, the data presented in related literature was processed and summarized. The methods related to the CFD model of the newly designed compressor were developed, summarized and evaluated. The accessed CFD data are in good agreement with the results of the former rolling piston compressor related investigations. The oil free operation prevents the contamination of the working fluid from lubricant. Since the compressor is planned to work in open cycle within the sensitive environment of thermal heat sources contamination free operation has to be accomplished. However, oil-free operation also results in significantly lower performance based on the modelling results.
Highlights
Rolling piston compressors (RPC) or often referred more generally as stationary vane compressors are mainly applied in low capacity (< 2 kW) household refrigerator, air-conditioning (AC) and heat pump units [1, 2]
The evaluation of a newly designed oil-free rotary compressor is presented based on transient 3D Computational Fluid Dynamics (CFD) simulations
The accessed CFD data are in good agreement with the results of the former rolling piston compressor related investigations
Summary
Rolling piston compressors (RPC) or often referred more generally as stationary vane compressors are mainly applied in low capacity (< 2 kW) household refrigerator, air-conditioning (AC) and heat pump units [1, 2]. Abstract The evaluation of a newly designed oil-free rotary compressor is presented based on transient 3D Computational Fluid Dynamics (CFD) simulations. Essential drawback of the Jaworowski design is that the positioning of the swinging vane is not supported by discharge pressure as in the Yule engine and in most of the common RPCs. The stationary vane compressor went through significant development since its introduction, which results in various modifications of the base design to achieve better efficiency and improve the applicability of the unit.
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