Efficiency Parameters for Heat Transfer in Tube Banks

Correlations for heat transfer and pressure drop for in-line and staggered banks of tubes dre suggested. They apply to Re from 1 to 2 × 106 and Pr from 0.7 to 104, and a wide range of relative transverse and longitudinal pitches. A technique of optimization of bank geometries is suggested on the basis of the authors’ experiments and the other published data. The suggested efficiency factor Eu Re3 may be useful for the interpretation of the available vast experimental data and for the evaluation of efficiency of heat transfer surfaces in further improvements of heat exchanger construction.