A Correlation for the Air Side Heat Transfer Coefficient Assessment in Continuous Flat Plate Finned Heat Exchangers

Abstract

A simplified correlation for the airside heat transfer coefficient exhibited from plate finned heat exchangers was accomplished. The development of the present formula was based on the implementation of the Buckinghampi theorem. The physical dimensions of the plate fin parameters and tube geometry of the heat exchanger were incorporated in the correlation to reveal their effect on airside heat transfer coefficient. It is intended to be used for air dry bulb and wet bulb temperatures in the range 16–40 آ°C and 13–20 آ°C through the tube banks, respectively. It is valid for transverse to longitudinal tube pitches ratio of XT/XL = 0.75 and 0.83. The airside Reynolds number based on maximum flow velocity and equivalent tube diameter to be in the range of 2.2 أ— 103 ≤ Re ≤ 8.75 أ— 103. The total mean absolute errors of the predicted overall heat transfer coefficient and heat duty were 10% and 13%, respectively.