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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Wadekar, V Wagner equation, for vapour pressure, Wake, Coles law of the, Wall layer transmissivity, Wall temperature: Wallis correlations: Wallis criterion, for transition from stratified to annular flow, applications in condensation, Walz' method, for laminar boundary layers, Waste heat boilers, Waste water, fouling by, Water: Watertube boiler, Wavelengths, of blackbody radiation, Waves, interfacial, effect on film condensation on vertical surface, Wavy fins, in plate fin exchangers, Webb, D R
Condensation of Vapour Mixtures Condensation of Vapour Mixtures Forming Immicible Liquids
Webb, R L Weber, M, Weber number, Weil, C J Welded channel head, in shell-and tube heat exchanger, Welded fins: Welded plate exchangers: Welding: Welds: Wentz and Thodos equation, for fixed-bed pressure drop, Wet-bulb temperature, Wettability, of surface, effect on pool boiling, Whalley and Hewitt correlations: White-Metzner model, for non-Newtonian fluid, Wicks, for heat pipes: Wilday, A J Wildsmith, G, Wills-Johnson flow stream analysis method for segmentally baffled shell-and-tube heat exchangers, Wilson, D I Window zone, in shell-and-tube heat exchangers: Winter, H H, Wire matrix inserts, in heat exchangers, Wirth, K E, Wispy annular flow, regions of occurrence of, Work (in exergy analysis) Working fluid, selection of for heat pipe,

Index

HEDH
A B C D E F G H I J K L M N O P Q R S T U V W
Wadekar, V Wagner equation, for vapour pressure, Wake, Coles law of the, Wall layer transmissivity, Wall temperature: Wallis correlations: Wallis criterion, for transition from stratified to annular flow, applications in condensation, Walz' method, for laminar boundary layers, Waste heat boilers, Waste water, fouling by, Water: Watertube boiler, Wavelengths, of blackbody radiation, Waves, interfacial, effect on film condensation on vertical surface, Wavy fins, in plate fin exchangers, Webb, D R
Condensation of Vapour Mixtures Condensation of Vapour Mixtures Forming Immicible Liquids
Webb, R L Weber, M, Weber number, Weil, C J Welded channel head, in shell-and tube heat exchanger, Welded fins: Welded plate exchangers: Welding: Welds: Wentz and Thodos equation, for fixed-bed pressure drop, Wet-bulb temperature, Wettability, of surface, effect on pool boiling, Whalley and Hewitt correlations: White-Metzner model, for non-Newtonian fluid, Wicks, for heat pipes: Wilday, A J Wildsmith, G, Wills-Johnson flow stream analysis method for segmentally baffled shell-and-tube heat exchangers, Wilson, D I Window zone, in shell-and-tube heat exchangers: Winter, H H, Wire matrix inserts, in heat exchangers, Wirth, K E, Wispy annular flow, regions of occurrence of, Work (in exergy analysis) Working fluid, selection of for heat pipe,
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W Webb, D R
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Condensation of Vapour Mixtures

DOI 10.1615/hedhme.a.000186

2.6 CONDENSATION
2.6.3 Condensation of Vapour Mixtures

David R. Webb

A. Introduction

The author would like to acknowledge the frequent use he has made of the previous article by D. Butterworth in HEDH in 1983. His material has been expanded to include many important developments in the understanding of mixed vapour condensation.

Over this period ever increasing reliance has been placed on proprietary, computerised design and rating programs. This being so, it is more necessary than ever for the design engineer to have a good understanding of the condensation process and the limitations of the design methods available to him.

Mixture condensation differs from pure vapour condensation in two ways. Firstly the temperature of the condensing process changes through the condenser, and secondly, mass transfer effects are introduced in addition to those of heat transfer.

Figure 1 shows a typical condensation, or cooling curve, for a mixture of vapours. It is a plot of saturation, or dew temperature, Tg*, against specific enthalpy, h, and gives an approximation to the path followed by a condensation process through a condenser, (Section B).

, coolant temperature and pressure, , described in Section C(d). The formulation of the latter equation is outside the scope of this section but pressure drop is considered in for tubes and for shellside flow in tubular exchangers.

at = .

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