Share

A proposal of graphing methods for improved compressor test data evaluation.

Number: 1391

Author(s) : SJOHOLM L., MA Y. C., WYNN B.

Summary

This paper provides alternative improved graphing methods for better test data evaluation of refrigeration compressors. The compressor could be of many different types of positive displacement compressors such as scroll, screw, rolling piston, and reciprocating compressors. They include both shaft driven and hermetic compressors as well as with and without vapor injection.
The conventional method is to graph volumetric and isentropic efficiencies based on test data. However, it has limitations such as defining an appropriate geometric displacement, graphing the isentropic efficiency, and evaluating the energy balance. These issues are even more complicated when considering built-in volume ratio, vapor injection, large speed range, and refrigerants with large glide.
The proposed method consists of test data that are directly or indirectly graphed: Suction mass flow, vapor injection mass flow, compressor power, discharge temperature and compressor energy balance. This proposed method is used as filtering of the test points prior to applying those test points in any type of compressor model. Examples of the proposed graphs are presented using actual test data. This approach minimizes the risk of overfitting certain parameters and drives a more harmonized approach of all parameters.

Available documents

Format PDF

Pages: 10 p.

Available

Free

Download

Details

  • Original title: A proposal of graphing methods for improved compressor test data evaluation.
  • Record ID : 30030315
  • Languages: English
  • Subject: Technology
  • Source: 2022 Purdue Conferences. 26th International Compressor Engineering Conference at Purdue.
  • Publication date: 2022/07/15

Links


See other articles from the proceedings (83)
See the conference proceedings

Indexing