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http://dx.doi.org/10.6110/KJACR.2016.28.12.495

Condensation Heat Transfer and Pressure Drop of R245fa in a Plate-shell Heat Exchanger  

Kim, Sung Woo (Department of Mechanical Engineering, Graduate School Korea University)
Baek, Changhyun (Department of Mechanical and Control Engineering, The Cyber University of Korea)
Song, Kang Sub (Department of Mechanical Engineering, Graduate School Korea University)
Kim, Yongchan (Department of Mechanical Engineering, Korea University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.28, no.12, 2016 , pp. 495-501 More about this Journal
Abstract
Condensation heat transfer and pressure drop of R245fa were investigated experimentally in a plate-shell heat exchanger which consisted of thirty seven counter flow channels formed by thirty-eight plates with a chevron angle of $50^{\circ}$. The upflow of the water in one channel receives heat from the downflow of R245fa in the other. The effects of refrigerant mass flux, imposed heat flux, refrigerant saturation pressure, and mean vapor quality on the heat transfer characteristics were explored in detail. Experimental correlations were proposed to predict the condensation heat transfer coefficient and friction factor in terms of the Boiling number, Reynolds number, and Prandtl number. In the experiments, the mean vapor quality in the refrigerant channel was varied from .22 to .82, mass flux from 3 to $5kg/m^2$, imposed heat flux from 1 to $3kW/m^2$, and system pressure from .61 to .81 MPa.
Keywords
Plate-shell heat exchanger(Plate-shell); Heat transfer; Pressure drop; Condensation;
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