A New Consideration of the Explicit Calculation Model of Variable-Speed EVI Scroll Compressor

Abstract

The development of explicit calculation models for accurate and rapid prediction of the performance of a variable speed EVI scroll compressor is vital for the design of scroll compressors of this kind and their utilizing systems. This study analyzes the compression process, including the injection process of refrigerant in a variable speed EVI scroll compressor, and a new modelling technique was applied to develop explicit equations that improve the results of previous work. As a result of parameter prediction of the compressor by using proposed model, the injection mass flow rate can describe 82.5% of the experimental data with a deviation of ±10%, the total input power can describe 90.5% of the experimental data with a deviation of ±5%, and the discharge temperature can describe 93.7% of the experimental data with a deviation of ±4K, which proves to have a clearer physical meaning, high accuracy and to be relevant to applications.