To improve condensation heat transfer performance in a variety of systems, reduced channel sizes are used. However, few studies have been performed on complete heat exchangers. Hence, condensation heat transfer coefficients were studied experimentally in two ultracompact heat exchangers with a hydraulic diameter of 133 μm using steam as the working fluid. Effects of mass flux, average vapor quality, saturation pressure, and heat exchanger size were examined. The condensation heat transfer coefficients showed strong influence of mass flux and quality. However, the effects of saturation pressure and heat exchange size were not significant. Three conventional and three mini/microscale correlations were compared with the experimental data. The conventional and mini/microscale correlations developed for annular flow overpredict the data significantly. The Soliman correlation developed for mist flow showed the best agreement with the data.
Condensation Heat Transfer in Ultracompact Minichannel Heat Exchangers
and Nuclear Engineering,
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received October 23, 2012; final manuscript received June 19, 2013; published online October 21, 2013. Assoc. Editor: Arun Muley.
- Views Icon Views
- Share Icon Share
- Search Site
Zhang, Z., Peles, Y., and Jensen, M. K. (October 21, 2013). "Condensation Heat Transfer in Ultracompact Minichannel Heat Exchangers." ASME. J. Thermal Sci. Eng. Appl. March 2014; 6(1): 011003. https://doi.org/10.1115/1.4024902
Download citation file: