TheBasicsof AIR-COOLEDHEATEXCHANGERS - Chart …
LMTD = log mean temperature difference °F M=mass flow rate lb/hr mw = minimum wall thickness in n=tubes per row, per foot of exchanger width l/ft N=rows of tubes in direction of air flow Dimensionless NRe = Reynolds Number Dimensionless Ntu = number of heat transfer units Dimensionless OD = outside diameter of tube ft
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