A compression process model with integral equations for the scroll mechanism in a scroll compressor

• Scroll mechanism and its coefficient of scroll compression chamber pairs are defined.
• Compression process model with integral equations for the scroll mechanism is developed.
• Case study of the scroll mechanism in an air scroll compressor is presented.
• The developed model can describe compression process of the scroll mechanism.
• The developed model can predicate the efficiency of the scroll mechanism well.

The work of a scroll compressor is performed by its scroll mechanism. In this paper, the coefficient of compression chambers of the scroll mechanism is defined. Based on energy counting system of the scroll compressor, the working process of a scroll compression chamber is analyzed and the compression process of the scroll mechanism in its working period is expressed by that of one scroll compression chamber. Thereafter, a compression process model with integral equations for the scroll mechanism is developed. The developed model uses the real working conditions (such as the suction and discharge temperatures, suction and discharge pressures, and flow rate) as the initial and supplementary conditions. The compression process model for the scroll mechanism in an air scroll compressor, as a case study, shows that the developed model can describe the compression process and predicate the volumetric efficiency and compression efficiency of the scroll mechanism well.