Heat transfer from humid air to a two-row direct expansion plate finned tube coils (DX) under condensing conditions

Shokouhmand, Hossein | Ale Ebrahim, Nader

The 1996 3rd Biennial Joint Conference on Engineering Systems Design and Analysis, ESDA. Part 6 (of 9), Montpellier, Fr, 07/01-04/96; pp. 221-228. 1996

Abstract:

Direct Expansion plate finned tube coils (DX) are extensively used in air conditioning systems. If the air flowing over the coil is humid and the coil's temperature is below the dew point, condensation will occur on the fins. In this paper a two-row Direct Expansion plate finned tube coils (DX) in which the tubes are arranged triangular, has been selected for analysis of sensible and latent heats. By applying a two-dimensional analysis on an individual cell of the coil, the governing equations have been derived. These equations have been solved numerically using a finite difference method. The temperature distributions and fin efficiency variation for both wet and dry surface conditions, versus fin pitch, fin material, temperature and humidity of the inlet air flow and Reynolds number, have been determined.


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