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

dc.contributor.authorChoi, K.I.
dc.contributor.authorPamitran, A.S.
dc.contributor.authorOh, J.T.
dc.date.accessioned2015-06-04T11:48:49Z
dc.date.available2015-06-04T11:48:49Z
dc.date.issued2010
dc.description.abstractPaper presented at the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July, 2010.en_ZA
dc.description.abstractAn 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 120C, 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. The heat transfer coefficient of the present working refrigerants was compared Laminar flow was observed in the small tubes. A new boiling heat transfer coefficient correlation based on the superposition model for refrigerants in small tubes was developed.
dc.description.librarianksb2015en_ZA
dc.format.extent6 pagesen_ZA
dc.format.mediumPDFen_ZA
dc.identifier.citationChoi, KI, Pamitran, AS & Oh, JT 2010, 'Characteristics of two-phase flow boiling heat transfer of NH3, C3H8 and CO2 in horizontal circular small tubes', Paper presented to the 7th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Turkey, 19-21 July 2010.en_ZA
dc.identifier.urihttp://hdl.handle.net/2263/45411
dc.language.isoenen_ZA
dc.publisherInternational Conference on Heat Transfer, Fluid Mechanics and Thermodynamicsen_ZA
dc.relation.ispartofHEFAT 2010en_US
dc.rightsUniversity of Pretoriaen_ZA
dc.subjectTwo-phase boiling heat transferen_ZA
dc.subjectCircular small tubesen_ZA
dc.subjectNucleate boiling heat transferen_ZA
dc.subjectLaminar flowen_ZA
dc.subjectRefrigerantsen_ZA
dc.titleCharacteristics of two-phase flow boiling heat transfer of NH3, C3H8 and CO2 in horizontal circular small tubesen_ZA
dc.typePresentationen_ZA

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