IIR document
Comparison of heat transfer coefficient during evaporation of natural refrigerants and R1234yf in horizontal small tubes.
Number: pap. n. 236
Author(s) : OH J. T., CHOI K. I., SAITO K., et al.
Summary
An experimental data comparison of evaporation heat transfer coefficient of R744(CO2), R717(NH3), R290(C3H8) and R1234yf in in horizontal small tubes was conducted under varying flow conditions. The experimental data were obtained over a heat flux range of 5 to 70 kW/m2, mass fluxes from 50 to 600 kg/m2.s, saturation temperatures from 0 to 15°C, and quality up to 1.0. The test section made of stainless steel tubes with inner diameters of 1.5 and 3.0 mm, the length of 1000 mm and 2000 mm each, was heated uniformly by applying an electric power to the tubes directly. Effects of mass flux, heat flux, saturation temperature and inner tube diameter on heat transfer coefficient are reported. Among the present working refrigerants, R744 has a highest heat transfer coefficient. Laminar flow was observed in the evaporative small tubes and considered in the modification of evaporation heat transfer coefficient correlations.
Available documents
Format PDF
Pages: 10 p.
Available
Public price
20 €
Member price*
Free
* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).
Details
- Original title: Comparison of heat transfer coefficient during evaporation of natural refrigerants and R1234yf in horizontal small tubes.
- Record ID : 30004541
- Languages: English
- Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
- Publication date: 2012/06/25
Links
See other articles from the proceedings (142)
See the conference proceedings
Indexing
-
Comparison of heat transfer coefficient during ...
- Author(s) : CHOI K. I., OH J. T., SAITO K., et al.
- Date : 2014/05
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 41
- Formats : PDF
View record
-
Two-phase flow boiling heat transfer correlatio...
- Author(s) : CHIEN N. B., VU P. Q., OH J. T.
- Date : 2020/12/07
- Languages : English
- Source: 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
- Formats : PDF
View record
-
Heat transfer coefficient during evaporation of...
- Author(s) : CHOI K. I., KIM K. W., OH J. T., et al.
- Date : 2011/08/21
- Languages : English
- Source: Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
- Formats : PDF
View record
-
Experimental Study on the flow condensation hea...
- Author(s) : XIAO H., LI J.
- Date : 2015/10
- Languages : Chinese
- Source: Journal of Refrigeration - vol. 36 - n. 165
- Formats : PDF
View record
-
Experimental investigations of propane minichan...
- Author(s) : GAGAN J., BUTRYMOWICZ D., DUDAR A., et al.
- Date : 2017/09/06
- Languages : English
- Source: Compressors 2017: 9th International Conference on Compressors and Coolants.
- Formats : PDF
View record