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A transient refrigerator model validation including system perturbation.

Number: pap. n. 212

Author(s) : RHOADS A., BORTOLETTO A., MARTIN C., et al.

Summary

Experimental testing of HVAC&R systems can be costly and time-consuming. Transient simulation models of these systems allow for rapid testing and design modification and can help reduce the amount of experimental testing needed. This paper presents a Simulink-based transient analysis tool for modeling household refrigerator systems. The tool is capable of capturing the transient periods of the refrigeration system, including pull-down and system on/off. The tool allows for better design of control algorithms by capturing the system response to perturbation, such as door openings and product loadings. The model includes two segmented tube-fin heat exchanger models, a map-based compressor model, a non-adiabatic capillary tube model, and a single component cabinet model. A finite control volume approach is used to model the heat exchangers. The non-adiabatic capillary tube model is correlation-based and allows for tuning of the suction line heat exchanger performance. The model allows for sudden increases in cabinet heat load (door openings) to be applied at set intervals and captures the resulting system response. Several transient simulations are conducted for a single compartment R600a refrigerator model. A series of door openings are tested on a real system and replicated in the model. The simulation results, including system response to perturbation, are compared with experimental data and show agreement within +/- 15%.

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Pages: 9 p.

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Details

  • Original title: A transient refrigerator model validation including system perturbation.
  • Record ID : 30015826
  • Languages: English
  • Source: Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015.
  • Publication date: 2015/08/16
  • DOI: http://dx.doi.org/10.18462/iir.icr.2015.0212

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