Correlation of refrigerant mass flow rate through adiabatic capillary tubes using mixture refrigerant carbondioxide and ethane for low temperature applications

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Various binary mixtures of carbon dioxide and hydrocarbons, especially propane or ethane, as alternative natural refrigerants to Chlorofluorocarbons (CFCs) or Hydro fluorocarbons (HFCs) are presented in this paper. Their environmental performance is friendly, with an ozone depletion potential (ODP) of zero and Global-warming potential (GWP) smaller than 20. The capillary tube performance for the alternative refrigerant HFC HCand mixed refrigerants have been widely studied. However, studies that discuss the performance of the capillary tube to a mixture of natural refrigerants, in particular a mixture of azeotrope carbon dioxide and ethane is still undeveloped. A method of empirical correlation to determine the mass flow rate and pipe length has an important role in the design of the capillary tube for industrial refrigeration. Based on the variables that effect the rate of mass flow of refrigerant in the capillary tube, the Buckingham Pi theorem formulated eight non-dimensional parameters to be developed into an empirical equations correlation. Furthermore, non-linear regression analysis used to determine the co-efficiency and exponent of this empirical correlation based on experimental verification of the results database.

Original languageEnglish
Title of host publication4th International Meeting of Advances in Thermofluids, IMAT 2011
Pages1235-1245
Number of pages11
DOIs
Publication statusPublished - 1 Dec 2012
Event4th International Meeting of Advances in Thermofluids, IMAT 2011 - Melaka, Malaysia
Duration: 3 Oct 20114 Oct 2011

Publication series

NameAIP Conference Proceedings
Volume1440
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Meeting of Advances in Thermofluids, IMAT 2011
CountryMalaysia
CityMelaka
Period3/10/114/10/11

Keywords

  • Binary mixture
  • Capillary tube
  • Carbon dioxide
  • Cascade
  • Ethane

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