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Transport Processes and Separation in Zero-Gravity Destillation

Preußer, Niklas and Rieks, Sebastian and Kenig, Eugeny Y. and Stephan, Peter and Gambaryan-Roisman, Tatiana (2018):
Transport Processes and Separation in Zero-Gravity Destillation.
In: IHTC 16 - International Heat Transfer Conference 16 Digital Libary, August 10-15, Beijing, China, Begellhouse, ISSN 2377-424X,
DOI: 10.1615/IHTC16.her.023300,
[Online-Edition: http://dx.doi.org/10.1615/IHTC16.her.023300],
[Article]

Abstract

Zero-gravity distillation is a micro distillation process, in which the liquid flow is driven by capillary forces, similar to a heat pipe. In this study, the separation of ethanol-methanol mixtures in a zero-gravity distillation apparatus is investigated. Heat fluxes, temperature profiles and the fluid interface evolution are evaluated. The results show larger temperature differences between condenser and evaporator for a fluid mixture than for the pure fluids. For the investigated heat fluxes, the curvature change is dominated by gravitational forces. The curvature distribution is in good agreement with a numerical model. The results show that the process can be successfully used to separate an ethanol-methanol mixture despite the narrow vapour-liquid equilibrium of this fluid system. Under the conditions studied in this work, the separation efficiency of the process does not significantly depend on the heat flux.

Item Type: Article
Erschienen: 2018
Creators: Preußer, Niklas and Rieks, Sebastian and Kenig, Eugeny Y. and Stephan, Peter and Gambaryan-Roisman, Tatiana
Title: Transport Processes and Separation in Zero-Gravity Destillation
Language: English
Abstract:

Zero-gravity distillation is a micro distillation process, in which the liquid flow is driven by capillary forces, similar to a heat pipe. In this study, the separation of ethanol-methanol mixtures in a zero-gravity distillation apparatus is investigated. Heat fluxes, temperature profiles and the fluid interface evolution are evaluated. The results show larger temperature differences between condenser and evaporator for a fluid mixture than for the pure fluids. For the investigated heat fluxes, the curvature change is dominated by gravitational forces. The curvature distribution is in good agreement with a numerical model. The results show that the process can be successfully used to separate an ethanol-methanol mixture despite the narrow vapour-liquid equilibrium of this fluid system. Under the conditions studied in this work, the separation efficiency of the process does not significantly depend on the heat flux.

Journal or Publication Title: IHTC 16 - International Heat Transfer Conference 16 Digital Libary, August 10-15, Beijing, China
Place of Publication: Connecticut
Publisher: Begellhouse
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Profile Areas
Profile Areas > Thermo-Fluids & Interfaces
Event Location: Connecticut
Date Deposited: 08 Jan 2019 08:53
DOI: 10.1615/IHTC16.her.023300
Official URL: http://dx.doi.org/10.1615/IHTC16.her.023300
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