Boiling heat transfer and pressure drop of R-410A and R-134A in horizontal minichannels

Agus Sunjarianto Pamitran, Kwang Il Choi, Jong Taek Oh, Hoo Kyu Oh, Pega Hrnjak

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

Abstract

Experimental study on two-phase flow boiling heat transfer of R-410A and R-134a in horizontal small tubes was reported. The pressure drop and local heat transfer coefficients were obtained over heat flux range of 5 to 40 kW m -2, mass flux range of 70 to 600 kg m-2 s-1, saturation temperature range of 2 to 12°C, and quality up to 1.0. The test section was made of stainless steel tube with inner tube diameters of 0.5 and 3.0 mm, and lengths of 0.33, 2.0 and 3.0 m. The section was heated uniformly by applying an electric current to the tube directly. The effects on pressure drop and heat transfer coefficient of mass flux, heat flux, tube diameter, and saturation temperature were shown. The experimental results were compared against several existing correlations. A new boiling heat transfer coefficient correlation based on the superposition model for refrigerants in small tubes was developed.

Original languageEnglish
Title of host publication4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009
PublisherNational Taipei University of Technology
Pages202-207
Number of pages6
ISBN (Print)9868509610, 9789868509610
Publication statusPublished - 1 Jan 2009
Event4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009 - Taipei, Taiwan, Province of China
Duration: 20 May 200922 May 2009

Publication series

Name4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009

Conference

Conference4th Asian Conference on Refrigeration and Air-Conditioning, ACRA 2009
Country/TerritoryTaiwan, Province of China
CityTaipei
Period20/05/0922/05/09

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