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Performance evaluation and development of an empirical model for a hermetically sealed reciprocating compressor.

Author(s) : AGARWAL R. S., PARAMANE S.

Summary

This work is aimed at performance evaluation of a HFC-134a small hermetic reciprocating compressor under design and off-design conditions and to develop a simple empirical model based on experimental results to represent the performance of the compressor. For this purpose, detailed experiments were carried out on a compressor calorimeter under 15 different operating conditions (evaporator temperature ranging from -23.3 to -12.2 °C and condensing temperature ranging from 45.2 to 54.4 °C). These test results were analysed to calculate the compressor capacity, mass flow rate and EER of the compressor. A computer programme was prepared for that purpose. The properties of the refrigerant were calculated by using NIST's REFPROP (Version 6) software. Then for these 15 data points an equation in a multivariable form was fitted by using MATLAB (Release 12) software. Thus, a simple model was developed to represent the performance of compressor as a function of evaporating and condensing temperature only. Then, another test has been carried out by choosing any arbitrary temperature for verifying the validity of model. It has been found that model developed predicted compressor capacity and mass flow rate within plus or minus 1.1 and 2.8% accuracy, respectively; using these equations, compressor performance maps were developed.

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Details

  • Original title: Performance evaluation and development of an empirical model for a hermetically sealed reciprocating compressor.
  • Record ID : 2005-0136
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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