Abstract
In this study, experimental investigations were carried out to evaluate the film condensation heat transfer characteristics of R1234ze(E) and R1233zd(E) over horizontal plain tubes. Experiments were conducted at saturation temperatures of 36, 38 and 40 °C with different surface sub-cooling temperatures in the range of 3∼18 °C. Experimental results showed that the film condensation heat transfer coefficient decreased with increase in the surface sub-cooling temperature. The effect of tube diameter on film condensation heat transfer coefficient was also examined, and it was found that the smaller the tube diameter, the higher the film condensation heat transfer coefficient. In the present study, experimental correlations of the Nusselt number for R1234ze(E) and R1233zd(E) were also proposed respectively, with ±20 % of error band.
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Ji-Woon Ko received his B.S. and M.S. degrees in Mechanical Engineering from Jeju National University in 2011 and 2013, respectively. Currently, he works for Korea Institute of Industrial Technology as a Researcher. His research interests are refrigeration and air conditioning, heat pumps, heat exchangers.
Dong-Soon Jeon received his B.S., M.S. and Ph.D. degrees in Mechanical Design from Seoul National University of Science and Technology in 2002, and in Mechanical Engineering from Hanyang University in 2005, and in Mechanical Engineering from Korea University Technology & Education in 2015, respectively. Currently, he works for Korea Institute of Industrial Technology as a Senior Researcher. His research interests are liquid desiccant systems, heat pumps, heat exchangers and heat source equipment cycle design and performance evaluation.
Young-Lyoul Kim received his B.S., M.S. and Ph.D. degrees in Mechanical Engineering from Seoul National University in 1981 and 1983, and Korea Institute of Science and Technology in 1997, respectively. Currently, he works for Korea Institute of Industrial Technology as a Principal Researcher. His research interests are liquid desiccant systems and 2-phase flow.
Seon-Chang Kim received his B.S., M.S. and Ph.D. degrees in Mechanical Engineering from Inha University in 1989 and 1991, and Hanyang University in 1997, respectively. Currently, he works for Korea Institute of Industrial Technology as a Principal Researcher. His research interests are liquid desiccant systems, absorption systems, heat pumps and heat exchangers.
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Ko, JW., Jeon, DS., Kim, YL. et al. Experimental study on film condensation heat transfer characteristics of R1234ze(E) and R1233zd(E) over horizontal plain tubes. J Mech Sci Technol 32, 527–534 (2018). https://doi.org/10.1007/s12206-017-1254-2
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DOI: https://doi.org/10.1007/s12206-017-1254-2