Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments
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 resistan...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Wiley Blackwell
2014
|
| Online Access: | http://hdl.handle.net/1721.1/86334 https://orcid.org/0000-0002-2901-0638 |
| _version_ | 1826209665857355776 |
|---|---|
| author | Narayan, G. Prakash Sharqawy, Mostafa H. Lam, Steven Das, Sarit K. Lienhard, John H. |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Narayan, G. Prakash Sharqawy, Mostafa H. Lam, Steven Das, Sarit K. Lienhard, John H. |
| author_sort | Narayan, G. Prakash |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T14:26:27Z |
| format | Article |
| id | mit-1721.1/86334 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:26:27Z |
| publishDate | 2014 |
| publisher | Wiley Blackwell |
| record_format | dspace |
| spelling | mit-1721.1/863342022-09-29T09:27:35Z Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments Narayan, G. Prakash Sharqawy, Mostafa H. Lam, Steven Das, Sarit K. Lienhard, John H. Massachusetts Institute of Technology. Department of Mechanical Engineering Lienhard, John H. Narayan, G. Prakash Lam, Steven Lienhard, John H. 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. Center for Clean Water and Clean Energy at MIT and KFUPM 2014-05-01T17:03:26Z 2014-05-01T17:03:26Z 2013-02 2012-08 Article http://purl.org/eprint/type/JournalArticle 00011541 1547-5905 http://hdl.handle.net/1721.1/86334 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. https://orcid.org/0000-0002-2901-0638 en_US http://dx.doi.org/10.1002/aic.13944 AIChE Journal Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Wiley Blackwell Prof. Lienhard via Angie Locknar |
| spellingShingle | Narayan, G. Prakash Sharqawy, Mostafa H. Lam, Steven Das, Sarit K. Lienhard, John H. Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments |
| title | Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments |
| title_full | Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments |
| title_fullStr | Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments |
| title_full_unstemmed | Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments |
| title_short | Bubble columns for condensation at high concentrations of noncondensable gas: Heat-transfer model and experiments |
| title_sort | bubble columns for condensation at high concentrations of noncondensable gas heat transfer model and experiments |
| url | http://hdl.handle.net/1721.1/86334 https://orcid.org/0000-0002-2901-0638 |
| work_keys_str_mv | AT narayangprakash bubblecolumnsforcondensationathighconcentrationsofnoncondensablegasheattransfermodelandexperiments AT sharqawymostafah bubblecolumnsforcondensationathighconcentrationsofnoncondensablegasheattransfermodelandexperiments AT lamsteven bubblecolumnsforcondensationathighconcentrationsofnoncondensablegasheattransfermodelandexperiments AT dassaritk bubblecolumnsforcondensationathighconcentrationsofnoncondensablegasheattransfermodelandexperiments AT lienhardjohnh bubblecolumnsforcondensationathighconcentrationsofnoncondensablegasheattransfermodelandexperiments |