Characteristic Analysis of Condensate Carry-Over According to the Surface Tensions in the Wet and the Dry Conditions on the Fin Surfaces of Heat Exchangers

Byeunggi Kim; Su-Won Lee; Samchul Ha; Young-chull Ahn; Jae Keun Lee

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자료유형: 학술저널

저자정보: Byeunggi Kim Su-Won Lee Samchul Ha Young-chull Ahn Jae Keun Lee

저널정보: 대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.20 No.11

발행연도: 2006.11

수록면: 1,942 - 1,949 (8page)

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Typically, condensate forms as droplets on the fin surfaces and may bridge the space between the fin surfaces. This is due to the dry characteristics inherent to the fin surface. The droplets increase the air-side pressure drop. In the case of high air velocities, these droplets may be blown off the fins and entrained in the air stream. To minimize the formation of condensate droplet, the wet ability of the fins must be improved. The carry-over velocity is affected by fin surface characteristics. To avoid carry-over in the air conditioner having the highest air velocity of 1.5 m/sec, the dynamic contact angle (DCA) should be at least lowly under 60°.

#Carry-Over #Evaporator #Hydrophilicity #Condensation #Plate Fin-Tube Heat Exchanger

참고문헌 (7)

참고문헌 신청

Brown, J. S., Terry, J. L. and Hutter, R. J., 1994, "An Analytical Prediction of Water Droplet Travel when Discharged from the Face of an Evaporator Core," 1994 SAE International Congress and Exposition, Detroit, Michigan, Paper 940501.

Good, R. J., 1993, "Contact Angle, Wettability and Adhesion: A Critical Review," in Contact Angle Wettability and Adhesion, Mittal, K.L. (ed.), VSP BV, The Netherlands, 3-36.

Ha, S. C., Kim, C. H., Ahn, S. P. and Dreitser, G. A., 1998, "Condensate Drainage Characteristics of Plate Fin-and-Tube Heat Exchanger," Proceedings of the International Conference on Heat Exchangers for Sustainable Development, pp.423~430, Lisbon, Portug

Ha, S. C., Kim, C. H., Ahn, S. P. and Dreitser, G. A., 1999, "Hydraulic Performance of Wet Fin-and-Tube Heat Exchanger for Various Wettability Surfaces," Proceedings of Compact Heat Exchangers and Enhancement of Technology for the Process Industries, pp.4

Hong, K., 1996, "Fundamental Characteristics of Dehumidifying Heat Exchangers with and without Wetting Coating," Ph. D thesis, The Pennsylvania State University

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