Réduction de la charge en frigorigène dans un réfrigérateur-congélateur domestique au R600a en optimisant la géométrie du condenseur à paroi chaude

Translated title of the contribution: Refrigerant charge reduction in R600a domestic refrigerator-freezer by optimizing hot-wall condenser geometry

Wonhee Cho, Dong Soo Jang, Sang Hun Lee, Sungho Yun, Yongchan Kim

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Translated title of the contributionRefrigerant charge reduction in R600a domestic refrigerator-freezer by optimizing hot-wall condenser geometry
Original languageFrench
Pages (from-to)295-306
Number of pages12
JournalInternational Journal of Refrigeration
Volume117
DOIs
Publication statusPublished - 2020 Sep

Keywords

  • Hot-wall condenser
  • Refrigerant charge
  • Refrigerator-freezer
  • Transient simulation

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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