Experimental investigation on two-phase flow boiling heat transfer of five refrigerants in horizontal small tubes of 0.5, 1.5 and 3.0 mm inner diameters

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

Research output: Contribution to journalArticlepeer-review

73 Citations (Scopus)

Abstract

An experimental investigation on two-phase flow boiling heat transfer with refrigerants of R-22, R-134a, R-410A, C3H8 and CO 2 in horizontal circular small tubes is presented. The experimental data were obtained over a heat flux range of 5-40 kW m-2, mass flux range of 50-600 kg m-2 s-1, saturation temperature range of 0-15 °C, and quality up to 1.0. The test section was made of stainless steel tubes with inner diameters of 0.5, 1.5 and 3.0 mm, and lengths of 330, 1000, 1500, 2000 and 3000 mm. The experimental data were mapped on Wang et al. (1997) [5] and Wojtan et al. (2005) [6] flow pattern maps. The effects of mass flux, heat flux, saturation temperature and inner tube diameter on the heat transfer coefficient are reported. The experimental heat transfer coefficients were compared with some existing correlations. A new boiling heat transfer coefficient correlation that is based on a superposition model for refrigerants in small tubes is presented with 15.28% mean deviation and -0.48% average deviation.

Original languageEnglish
Pages (from-to)2080-2088
Number of pages9
JournalInternational Journal of Heat and Mass Transfer
Volume54
Issue number9-10
DOIs
Publication statusPublished - 1 Apr 2011

Keywords

  • Correlation
  • Flow boiling
  • Flow pattern
  • Heat transfer coefficient
  • Horizontal small tubes
  • Refrigerant

Fingerprint Dive into the research topics of 'Experimental investigation on two-phase flow boiling heat transfer of five refrigerants in horizontal small tubes of 0.5, 1.5 and 3.0 mm inner diameters'. Together they form a unique fingerprint.

Cite this