| Dry and wet air-side performance of a louver-finned heat exchanger having flat tubes Nae-Hyun Kim, Soo-Hwan Kim
The Journal of Mechanical Science and Technology, vol. 24, no. 7, pp.1553-1561, 2010
Abstract : A louver-finned flat tube heat exchanger was tested, and the data are compared with those of the state-of-the-art round tube heat exchanger.
Both heat exchangers have the same tube perimeter and fin pitch. Tests were conducted under dry and wet condition. Results
show that, under dry condition, both j and f factors of the round tube heat exchanger are larger than those of the flat tube heat exchanger.
As the Reynolds number decreases, however, the j and f factors of the flat tube heat exchanger increase at steeper slopes than those of the
round tube heat exchanger. Under wet condition, contrary to the dry surface, both j and f factors of the flat tube heat exchanger are larger
than those of the round tube heat exchanger. Explanation is provided considering the condensate drainage between louvers and fins. Performance
evaluation was also performed.
Keyword :
Finned tube; Heat exchanger; Dehumidification; Heat transfer coefficient; Pressure drop
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