A comparative study of the airside performance of winglet vortex generator and wavy fin-and-tube heat exchangers

Chi-Chuan Wang*, Y. J. Chang, C. S. Wel, B. C. Yang

*Corresponding author for this work

Research output: Contribution to conferencePaper

Abstract

This study presents airside performance of the delta winglet vortex generator (VG) vs. a wavy fin surface in both dry and wet conditions. The fin pitch of the test samples is 1.7 mm and the number of tube rows is 2 and 4, respectively. For the airside performance tested in dry condition, the heat transfer coefficient for the wavy fin surface is only 6% higher than that of the winglet VG at N = 2, but the pressure drop is about 15% higher. Conversely, the heat transfer coefficients for the winglet surface are higher than those of the wavy fin surface by approximately 5% with comparable pressure drop at N = 4. For the airside performance tested in wet conditionne heat transfer performance of the winglet VG is superior to that of the wavy fin surface for both N = 2 and N = 4. Furthermore, the pressure drop for winglet VG is considerably lower (15-40%). It is likely that this phenomenon is due to better condensate drainage caused by the swirled motion of the VG surface.

Original languageEnglish
Pages51-55
Number of pages5
StatePublished - 22 Nov 2004
Event2004 Winter Meeting - Technical and Symposium Papers, American Society of Heating, Refrigerating and Air-Conditioning Engineers - Anaheim, CA, United States
Duration: 24 Jan 200428 Jan 2004

Conference

Conference2004 Winter Meeting - Technical and Symposium Papers, American Society of Heating, Refrigerating and Air-Conditioning Engineers
CountryUnited States
CityAnaheim, CA
Period24/01/0428/01/04

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    Wang, C-C., Chang, Y. J., Wel, C. S., & Yang, B. C. (2004). A comparative study of the airside performance of winglet vortex generator and wavy fin-and-tube heat exchangers. 51-55. Paper presented at 2004 Winter Meeting - Technical and Symposium Papers, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Anaheim, CA, United States.