TUBESIDE EXIT CONDITION WITH COMPLETE CONDENSATION IN MULTITUBE CROSS-FLOW HEAT EXCHANGERS
Titel:
TUBESIDE EXIT CONDITION WITH COMPLETE CONDENSATION IN MULTITUBE CROSS-FLOW HEAT EXCHANGERS
Auteur:
Rabas, T. J.
Verschenen in:
Chemical engineering communications
Paginering:
Jaargang 10 (1981) nr. 1-3 pagina's 13-24
Jaar:
1981
Inhoud:
A transition condensate Froude number characterizes the tubeside exit condition or whether condensate fills the tube or is in a stratified flow regime with vapor flowing into the tube exit. The transition Froude number, which defines the boundary between high and low condensate loading conditions, was determined with single-phase water tests and was verified with two-phase tests of large multitube cross-flow heat exchangers. For both cases, the water or condensate is discharged from a tube or tubes into a gas or vapor-filled plenum. With complete condensation and high liquid loading, the flow regimes are progressively annular, slug, and plug followed by the tube running full with subcooled condensate. With complete condensation and low liquid loading, the flow regimes are annular, wavy, and stratified followed by stratified flow with vapor flowing back from the tube exit.
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