AIR-SIDE PERFORMANCE OF FLAT-TUBE LOUVER-FIN HEAT EXCHANGERS UNDER WET CONDITIONS: WET-SURFACE MULTIPLIERS FOR COLBURN j- AND f-FACTORS

摘要

Empirical correlations for the air-side thermal-hydraulic performance of flat-tube, louver-fin heat exchangers under wet conditions are developed in terms of wet-surface multipliers. Experimental database of dry and wet air-side performance has been compiled from related works in the literature. Important design parameters are identified and used in the correlations. The benefits of wet-surface multipliers in comparison to independent wet j- and f-factor correlations are discussed. An alternative data modeling approach is briefly introduced and compared with the conventional correlations.