ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
AN ANALYTICAL MODEL FOR CONDENSING AND EVAPORATING TWO-COMPONENT TWO-PHASE ANNULAR FLOW
Abstrakt
This paper describes an analytical model for determining heat transfer in horizontal two-phase condensing and evaporating two-component annular flow. Computations are presented for the case of volatile component (refrigerant) and small amounts of a nonvolatile component (oil) in the liquid layer. The analysis is based on the momentum and energy equations with the heat transfer in the liquid film determined using the Reynolds analogy between turbulent heat and momentum transfer. Two
separate methods are developed for extending this
model to include the effects of the two-component
nature of the flow. In the first procedure, average
(lumped) property values are computed assuming
ideal mixing occurs in the liquid phase. In the
second approach, the species diffusion equation is
also considered, and a variable (local) property
solution is obtained. Solutions are compared to a
similar analysis of single component two-phase flow
and to experimental data of another investigator.