Modeling and analysis of an open-drive Z-compressor

10th International Conference on Compressors and their Systems

Ziviani, Davide^1 ; Groll, Eckhard A.^1

Purdue University, School of Mechanical Engineering, Ray W. Herrick Laboratories, West Lafayette

IN, United States^1

关键词: Compressed air applications;    Compression chambers;    Governing equations;    Mechanical analysis;    Mechanistic modeling;    Performance improvements;    Preliminary experimental data;    Two stage rolling piston compressors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/232/1/012062/pdf
DOI  :  10.1088/1757-899X/232/1/012062

来源: IOP

【 摘 要 】

A rotary Z-compressor prototype for compressed air applications has been developed and tested. The Z-compressor working process resembles the one of a two-stage rolling piston compressor where the stages are phased by half rotation. In contrary to the traditional rolling piston design, the vane in a Z-compressor is positioned parallel to the main shaft and not perpendicular. In order to understand the impact of leakage and frictional losses and improve the design of such machine, a mechanistic model has been developed to include governing equations within the working chambers (i.e., two suction chambers and two compression chambers), leakage flow models, detailed mechanical analysis, one-degree of freedom valve model, in-chamber heat transfer and an overall energy balance of the compressor shell. The model has been validated with preliminary experimental data and then exercised to identify the potential performance improvements over a range of clearances and working conditions.