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Zero-Gravity Distillation with Metal Foams: A Modelling Approach

Rieks, Sebastian and Preußer, Niklas and Gambaryan-Roisman, Tatiana and Kenig, Eugeny Y. (2018):
Zero-Gravity Distillation with Metal Foams: A Modelling Approach.
In: CHEMICAL ENGINEERING TRANSACTIONS, pp. 283 - 288, 69, ISSN 2283-9216,
DOI: 10.3303/CET1869048,
[Online-Edition: https://www.aidic.it/cet/18/69/048.pdf],
[Article]

Abstract

Zero-gravity distillation (ZGD) is one of the few ways to establish a small-scale distillation process. In contrast to conventional distillation columns, capillary forces, e.g. induced by metal foams, are exploited to ensure liquid flow in ZGD units. In order to strengthen the knowledge basis necessary for the ZGD equipment design, understanding of the relevant transport phenomena is necessary. In this work, a model for phenomena the ZGD processes was developed. It includes momentum, heat and species transport in both liquid and vapour phases. Evaporation and condensation impacts on momentum transfer are captured in a simplified manner, allowing an approximate local flow velocity determination. The developed model was implemented in the OpenFOAM® software and used to numerically simulate methanol/ethanol distillation processes in 2D approximation. In a first numerical study, the influence of the metal foam porosity and thickness on the velocity, temperature and mass fraction fields was numerically investigated.

Item Type: Article
Erschienen: 2018
Creators: Rieks, Sebastian and Preußer, Niklas and Gambaryan-Roisman, Tatiana and Kenig, Eugeny Y.
Title: Zero-Gravity Distillation with Metal Foams: A Modelling Approach
Language: English
Abstract:

Zero-gravity distillation (ZGD) is one of the few ways to establish a small-scale distillation process. In contrast to conventional distillation columns, capillary forces, e.g. induced by metal foams, are exploited to ensure liquid flow in ZGD units. In order to strengthen the knowledge basis necessary for the ZGD equipment design, understanding of the relevant transport phenomena is necessary. In this work, a model for phenomena the ZGD processes was developed. It includes momentum, heat and species transport in both liquid and vapour phases. Evaporation and condensation impacts on momentum transfer are captured in a simplified manner, allowing an approximate local flow velocity determination. The developed model was implemented in the OpenFOAM® software and used to numerically simulate methanol/ethanol distillation processes in 2D approximation. In a first numerical study, the influence of the metal foam porosity and thickness on the velocity, temperature and mass fraction fields was numerically investigated.

Journal or Publication Title: CHEMICAL ENGINEERING TRANSACTIONS
Volume: 69
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Technical Thermodynamics (TTD)
Profile Areas
Profile Areas > Thermo-Fluids & Interfaces
Date Deposited: 02 Nov 2018 16:42
DOI: 10.3303/CET1869048
Official URL: https://www.aidic.it/cet/18/69/048.pdf
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