Performance analysis for a rotary compressor at high speed: experimental study and mathematical modeling

TL;DR

This study investigates the performance of a rotary compressor at high speeds through experiments and modeling, revealing efficiency losses due to leakage, discharge power, and supercharging effects, and providing insights for improved design.

Contribution

It offers a comprehensive experimental and mathematical analysis of high-speed rotary compressor performance, identifying key loss factors and mechanisms affecting efficiency.

Findings

Efficiency decreases at high speeds due to leakage and discharge losses.

Supercharging effects become prominent above 160Hz, reducing efficiency.

The study provides mechanisms for loss factors to guide better compressor design.

Abstract

This paper conducted a comprehensive study on the performance of a rotary compressor over a rotational speed range of 80Hz to 200Hz through experimental tests and mathematical modeling. A compressor performance test rig was designed to conduct the performance tests, with fast-response pressure sensors and displacement sensors capturing the P-V diagram and dynamic motion of the moving components. Results show that the compressor efficiency degrades at high speeds due to the dominant loss factors of leakage and discharge power loss. Supercharging effects become significant at speeds above 160Hz, and its net effects reduce the compressor efficiency, especially at high speeds. This study identifies and analyzes the loss factors on the mass flow rate and power consumption based on experimental data, and hypothesizes possible mechanisms for each loss factor, which can aid in the design of a high-speed rotary compressor with higher efficiency.