Investigation of Household Refrigerator System with Varied Capillary Tube Length

D. M. Madyira, G. T. Marangwanda, F. M. Ekundayo, T. O. Babarinde, S. A. Akinlabi

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)


In this paper, the performance of R600a was investigated in a household refrigerator originally designed to work with R134a using varied capillary tube length (1.0, 1.15, 1.30 and 1.45 m). The refrigerator was instrumented with four thermocouples at the inlet and outlet of the major components. Also, two pressure gauges were connected to the compressor to measure the suction and discharge of the compressor. The experimental results were used to evaluate the performance of the system. The results showed that at optimal capillary tube length the COP and cooling capacity of R600a in the system increased with 45% and 4.2% respectively and the power consumption reduced with 25% using 1.30 m varied capillary tube length compared to R134a. Conclusively, R600a can serve as a retrofit in the household refrigerator systems originally designed to work with R134a refrigerant.

Original languageEnglish
Article number042056
JournalJournal of Physics: Conference Series
Issue number4
Publication statusPublished - 18 Dec 2019
Event3rd International Conference on Engineering for Sustainable World, ICESW 2019 - Ota, Nigeria
Duration: 3 Jul 20198 Jul 2019


  • COP
  • R00a
  • R134a
  • capillary tube
  • power consumption

ASJC Scopus subject areas

  • General Physics and Astronomy


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