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Refrigerant charge reduction in R600a domestic refrigerator-freezer by optimizing hot-wall condenser geometry.

Author(s) : CHO W., JANG D. S., LEE S. H., YUN S., KIM Y.

Type of article: IJR article

Summary

The objective of this study is to investigate the effects of hot-wall condenser geometry on domestic refrigerator-freezers (RFs) in terms of refrigerant charge reduction. A transient simulation model for an R600a domestic RF is developed and validated to capture the dynamic performance at various operating conditions. The hot-wall condenser in the domestic RF is determined to store excess refrigerant charge. The effects of the hot-wall condenser geometry on the performance of the RF are analyzed according to the total refrigerant charge. The coefficient of performance (COP) decreases with decreasing hot-wall condenser length and diameter; however, the decrease in the COP of the RF is compensated by the decreased energy consumption. Based on the global minimum energy consumption, the optimum hot-wall condenser design is achieved when the tube length is reduced to 70% of its original size and the tube outer diameter is decreased to 3.75 mm. Furthermore, the total refrigerant charge in the RF corresponding to the optimized hot-wall condenser geometry is shown to be 14% lower compared to the rated charge amount.

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Pages: 295-306

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Details

  • Original title: Refrigerant charge reduction in R600a domestic refrigerator-freezer by optimizing hot-wall condenser geometry.
  • Record ID : 30027530
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 117
  • Publication date: 2020/09
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.05.012
  • Document available for consultation in the library of the IIR headquarters only.

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