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TWO-PHASE FORCED CONVECTION HEAT-TRANSFER DURING CONDENSATION ON HORIZONTAL TUBE BUNDLES

J. M. McNaught
Rankine Building National Engineering Laboratory, East Kilbride, Glasgow G75 OQU United Kingdom

Abstract

Existing published methods for the calculation of heat-transfer coefficients in design for condensation on tube bundles do not represent the interactive effects of interfacial shear and condensate inundation. With significant shear the heat-transfer process is two-phase forced convection and an appropriate correlation is derived in this paper using published data from small-scale experiments on both triangular and square pattern tube bundles. The predictions of methods based on (a) the two-phase correlative approach and (b) a published theoretical model for vapour shear on a single tube together with an inundation term are compared with the data and the relative performance of the methods is discussed.

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