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.
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2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4936-1
PROCEEDINGS PAPER
Characteristics of Two-Phase Flow Boiling Heat Transfer and Pressure Drop of NH3, C3H8 and CO2 in Horizontal Circular Small Tubes
Kwang-Il Choi,
Kwang-Il Choi
Chonnam National University, Yeosu, Chonnam, South Korea
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Maulana Rifaldi,
Maulana Rifaldi
Chonnam National University, Yeosu, Chonnam, South Korea
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Agus S. Pamitran,
Agus S. Pamitran
Chonnam National University, Yeosu, Chonnam, South Korea
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Jong-Taek Oh
Jong-Taek Oh
Chonnam National University, Yeosu, Chonnam, South Korea
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Kwang-Il Choi
Chonnam National University, Yeosu, Chonnam, South Korea
Maulana Rifaldi
Chonnam National University, Yeosu, Chonnam, South Korea
Agus S. Pamitran
Chonnam National University, Yeosu, Chonnam, South Korea
Jong-Taek Oh
Chonnam National University, Yeosu, Chonnam, South Korea
Paper No:
IHTC14-22660, pp. 407-413; 7 pages
Published Online:
March 1, 2011
Citation
Choi, K, Rifaldi, M, Pamitran, AS, & Oh, J. "Characteristics of Two-Phase Flow Boiling Heat Transfer and Pressure Drop of NH3, C3H8 and CO2 in Horizontal Circular Small Tubes." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 1. Washington, DC, USA. August 8–13, 2010. pp. 407-413. ASME. https://doi.org/10.1115/IHTC14-22660
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