Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments
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Author(s)
Narayan, G. Prakash
Sharqawy, Mostafa H.
Lam, Steven
Das, Sarit K.
Lienhard, John H.
Date Issued
February 2013
Journal
AIChE Journal
Publisher
Wiley Blackwell
Citation
Narayan, G. Prakash, Mostafa H. Sharqawy, Steven Lam, Sarit K. Das, and John H. Lienhard. “Bubble Columns for Condensation at High Concentrations of Noncondensable Gas: Heat-Transfer Model and Experiments.” AIChE Journal 59, no. 5 (May 2013): 1780–1790.
Version
Author's final manuscript
Abstract
Carrier gas based thermodynamic cycles are common in water desalination applications. These cycles often require condensation of water vapor out of the carrier gas stream. As the carrier gas is most likely a noncondensable gas present in very high concentrations (60–95%), a large additional resistance to heat transfer is present. It is proposed to reduce the aforementioned thermal resistance by condensing the vapor–gas mixture in a column of cold liquid rather than on a cold surface using a bubble column heat exchanger. A theoretical predictive model for estimating the heat-transfer rates and new experimental data to validate this model are described. The model is purely physics based without the need for any adjustable parameters, and it is shown to predict heat rates within 0 to −20% of the experimental values. The experiments demonstrate that heat-transfer rates in the proposed device are up to an order magnitude higher than those achieved in existing state-of-the-art dehumidifiers.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1002/aic.13944
