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Numerical assessment of influence of refrigerator charge in a light commercial freezer.

Number: pap. n. 12

Author(s) : PISANO A., MARTÍNEZ-BALLESTER S., CORBERÁN J. M., et al.

Summary

This work analyzes in a light commercial freezer the influence on the performance of varying the operating conditions, refrigerant charge and the system configuration. This analysis was conducted employing a simulation software (IMST-ART), based on a semi-empirical approach that assumes steady-state conditions, for the simulation of refrigerant vapor compression systems. The simulated vapor compression system uses propane as working fluid. The system consists of a single speed hermetic compressor, finned tube heat exchangers and a non-adiabatic capillary tube. The paper briefly describes the model used for the simulations. In particular, there is a description of the sub-models of the compressor, heat exchangers and the expansion device. The validation of the model was performed with experimental data obtained by testing the freezer. The purpose of the simulations is to identify the amount of refrigerant which minimizes energy consumption under varying operating conditions. It was also assessed the benefits of a system with variable charge against a fixed charge one. Results show that a system with a fixed charge, which uses the optimum charge for an specific ambient condition, can get a similar performance to a variable charge system when ambient conditions change.

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Pages: 10 p.

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Details

  • Original title: Numerical assessment of influence of refrigerator charge in a light commercial freezer.
  • Record ID : 30006405
  • Languages: English
  • Source: RCR 2012. 3rd IIR Workshop on Refrigerant Charge Reduction in Refrigerating Systems: Valencia, Spain, October 25-26, 2012.
  • Publication date: 2012/10/25

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