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A first-principles simulation model for the start-up and cycling transients of household refrigerators.

Author(s) : HERMES C. J. L., MELO C.

Type of article: Article, IJR article

Summary

A first-principles model for simulating the transient behaviour of household refrigerators is presented in this study. The model was employed to simulate a typical frost-free 440-l top-mount refrigerator, in which the compressor is on-off controlled by the freezer temperature, while a thermo-mechanical damper is used to set the fresh-food compartment temperature. Innovative modelling approaches were introduced for each of the refrigerator components: heat exchangers (condenser and evaporator), non-adiabatic capillary tube, reciprocating compressor, and refrigerated compartments. Numerical predictions were compared to experimental data showing a reasonable level of agreement for the whole range of operating conditions, including the start-up and cycling regimes. The system energy consumption was found to be within plus or minus 10% agreement with the experimental data, while the air temperatures of the compartments were predicted with a maximum deviation of plus or minus 1°C.

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Pages: 1341-1357

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Details

  • Original title: A first-principles simulation model for the start-up and cycling transients of household refrigerators.
  • Record ID : 2009-0213
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 31 - n. 8
  • Publication date: 2008/12

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