Pressure Calculation Methodology for Compressors in Mechanical Systems

Abstract

Compressors are integral components of mechanical and thermal systems, widely used in refrigeration, air-conditioning, gas pipelines, and industrial processes. The accurate calculation of compressor pressure is essential for ensuring optimum performance, energy efficiency, and system reliability. This research focuses on methodologies for calculating suction pressure, discharge pressure, and pressure ratio in reciprocating and centrifugal compressors. Analytical models are developed based on thermodynamic relations, including the isentropic process equation, polytropic efficiency, and volumetric efficiency. A comparative study between theoretical and experimental results highlights deviations caused by real-gas effects, mechanical losses, and leakage. The study further integrates case-based data from vapor compression cycle applications, providing practical validation of the pressure calculation methodology. The findings emphasize the role of pressure ratio in determining compressor work input, energy consumption, and overall cycle performance. This work contributes to developing accurate predictive tools for engineers and researchers, enabling better compressor design and efficient system integration in industrial and HVAC applications.

Cite as:

A. Gujar, & Anant A. (2025). Pressure Calculation Methodology for Compressors in Mechanical Systems. Research and Reviews: Journal of Mechanical Engineering, 1(3), 1–8. 

https://doi.org/10.5281/zenodo.17501451