Characteristics of two-phase flow boiling heat transfer and pressure drop of NH3, C3H8 and CO2 in horizontal circular small tubes

Kwang Il Choi, Maulana Rifaldi, Agus Sunjarianto Pamitran, Jong Taek Oh

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

Abstract

An experimental investigation on the characteristics of two-phase boiling heat transfer of NH3, C3H8 and CO2 in horizontal small stainless steel tubes of 1.5 and 3.0 mm inner diameters are presented in this paper. Experimental data were obtained over a heat flux range of 5 to 70 kW/m2, mass flux range of 50 to 600 kg/m2s, saturation temperature range of 0 to 12°C, and quality up to 1.0. The test section was heated uniformly by applying an electric current to the tubes directly. Nucleate boiling heat transfer was the main contribution, particularly at the low quality region. Laminar flow was observed in the small tubes. The heat transfer coefficient of the present working refrigerants was compared with other 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 publication2010 14th International Heat Transfer Conference, IHTC 14
Pages407-413
Number of pages7
DOIs
Publication statusPublished - 1 Dec 2010
Event2010 14th International Heat Transfer Conference, IHTC 14 - Washington, DC, United States
Duration: 8 Aug 201013 Aug 2010

Publication series

Name2010 14th International Heat Transfer Conference, IHTC 14
Volume1

Conference

Conference2010 14th International Heat Transfer Conference, IHTC 14
Country/TerritoryUnited States
CityWashington, DC
Period8/08/1013/08/10

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