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Design and development of an oil-free double-scroll air compressor used in a PEM fuel cell system

2022; Elsevier BV; Volume: 199; Linguagem: Inglês

10.1016/j.renene.2022.08.154

1879-0682

Jun Wang, Yi Han, Shiyang Pan, Zengli Wang, Dong Cui, Maofei Geng,

Thermodynamic and Exergetic Analyses of Power and Cooling Systems

The purpose of this study is to arrive at an optimum design of a scroll compressor with requirements of a relative high volume flow rate and a compact structure, which is suitable for the use of hydrogen proton exchange membrane fuel cell (PEMFC) in the automotive application. An analytical model of multi-scroll compressors with arbitrary number of involute scrolls was established, and their working characteristics including the volume flow rate, built-in volume ratio, relative friction speed between the orbiting and fixed scrolls, and dimensions of scrolls were analyzed. An optimized double-scroll compressor, which can simultaneously meet the design requirements of the volume flow rate, structure size and oil-free lubrication, was designed, and a compressor prototype was developed and tested. Furthermore, numerical simulations of the working process of the double-scroll compressor were carried out and verified, and then p - V indicated diagram and the compressor performance were studied. Results show that the developed double-scroll compressor remarkably increases the volume flow rate, and reduces the relative friction speed between two scrolls simultaneously, compared with the conventional single-scroll structure; and therefore it shows very superior performance as an oil-free scroll air compressor used in the PEMFC of the automotive application. • A novel oil-free double-scroll air compressor used in a PEMFC was designed and developed. • An analytical model of multi-scroll compressors was established. • p - V indicated diagram of the new double-scroll compressor was obtained. • Numerical simulations of working process of the new compressor were conducted and verified. .