Direct Contact Evaporation Between Two Immiscible Liquids in a Spray Column
01 Aug 1989-Journal of Heat Transfer-transactions of The Asme (American Society of Mechanical Engineers)-Vol. 111, Iss: 3, pp 780-785
TL;DR: In this article, the direct contact evaporation of refrigerant 113 and n-pentane in a stagnant column of distilled water is investigated, and the effects of these parameters on volumetric heat transfer coefficient, holdup, and agglomeration are investigated.
Abstract: The present investigation deals with the direct contact evaporation of refrigerant 113 and n-pentane in a stagnant column of distilled water. The operational parameters investigated in the experimental study are the operating column height, the temperature difference, the dispersed phase flow rate, and the diameter and number of orifices in the distributor. The effects of these parameters on volumetric heat transfer coefficient, holdup, and agglomeration are investigated. A modified relation, based on the theoretical analysis of Smith et al. (1982), is also developed for predicting the theoretical volumetric heat transfer coefficient. Comparison with related works available in the literature shows reasonable agreement.
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TL;DR: In this article, the heat transfer to dispersed droplets in an immiscible continuous phase was studied for the n -pentane-water system, where the gas-liquid-liquid three-phase section of the exchanger was divided into two stages, where volumetric heat transfer coefficients were developed, respectively.
24 citations
TL;DR: In this article, a semi-analytical approach was presented to study the transient heat transfer of a single volatile drop evaporation in an immiscible liquid with bubble nucleation inside the drop.
19 citations
TL;DR: In this article, the main emphasis is on convective flow effects and analytical or numerical studies of direct contact transfer phenomena, rather than the experimental aspects or the specifics of the design of direct-contact transfer systems.
Abstract: Publisher Summary The study of direct-contact heat and mass transfer to liquid droplets (dispersed phase) moving in a fluid medium (continuous phase) is of interest because the transfer rates with direct-contact systems are usually much higher than those with surface-type exchangers. This is due to the availability of a larger surface area for a given volume. Direct-contact transfer processes with moving liquid droplets may or may not involve phase change at the drop surface. Furthermore, the process may involve single- or multi component systems. This chapter is concerned primarily with analytical or numerical studies of direct contact transfer phenomena, rather than the experimental aspects or the specifics of the design of direct-contact transfer systems. The main emphasis throughout is on convective flow effects. Recent studies related to direct-contact heat and mass transfer processes with moving liquid droplets are reviewed. Finally, the chapter concludes that, analytical or numerical studies of compound drops are at the initial stages. Very extensive studies are needed in this important area.
16 citations
TL;DR: In this article, the quasi-steady state connective evaporation of a rising volatile drop in an immiscible liquid with bubble nucleation inside the drop was derived.
15 citations
Cites methods or result from "Direct Contact Evaporation Between ..."
...(17) Seetharamu and Battya [14] analyzed the experimental results of Sideman and Taitel [1] and obtained the following correlation:...
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...(17) was prepared by Seetharamu and Battya [14] for different percentages of evaporation, but the plot in Fig....
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...Comparison of the present solution with the experimental correlation of Seetharamu and Battya [14]....
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TL;DR: In this article, an experimental pilot scale three-phase, direct-contact heat exchanger was constructed and tested using normal pentane as the dispersed phase and water as the continuous phase, and the experimental volumetric heat transfer coefficient values are on average 30% greater than those estimated with the correlation previously proposed by Jacobs.
15 citations