Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability
Distillation and chemical processing under vacuum is of immense interest to petroleum and chemical industries due to lower energy costs and improved safety. To tap into these benefits, energy efficient reboilers with lower maintenance costs are required. Here, a horizontal thermosyphon reboiler is i...
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| Format: | Article |
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Elsevier
2016
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| Online Access: | https://eprints.nottingham.ac.uk/37037/ |
| _version_ | 1848795379274874880 |
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| author | Agunlejika, Ezekiel O. Langston, Paul A. Azzopardi, Barry J. Hewakandamby, Buddhika N. |
| author_facet | Agunlejika, Ezekiel O. Langston, Paul A. Azzopardi, Barry J. Hewakandamby, Buddhika N. |
| author_sort | Agunlejika, Ezekiel O. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Distillation and chemical processing under vacuum is of immense interest to petroleum and chemical industries due to lower energy costs and improved safety. To tap into these benefits, energy efficient reboilers with lower maintenance costs are required. Here, a horizontal thermosyphon reboiler is investigated at subatmospheric pressures and low heat fluxes. This paper presents detailed experimental data obtained using Wire Mesh Sensor in a gas-liquid flow with heat transfer as well as temperatures, pressures and recirculation rates around the loop. Flow regimes which have been previously identified in other systems were detected. The nature of the instability which underpins the mechanisms involved and conditions aiding instability are reported. Churn flow pattern is persistently detected during instability. The nature of the instability and existence of oscillatory churn flow are interconnected |
| first_indexed | 2025-11-14T19:31:09Z |
| format | Article |
| id | nottingham-37037 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:31:09Z |
| publishDate | 2016 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-370372020-05-04T18:06:13Z https://eprints.nottingham.ac.uk/37037/ Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability Agunlejika, Ezekiel O. Langston, Paul A. Azzopardi, Barry J. Hewakandamby, Buddhika N. Distillation and chemical processing under vacuum is of immense interest to petroleum and chemical industries due to lower energy costs and improved safety. To tap into these benefits, energy efficient reboilers with lower maintenance costs are required. Here, a horizontal thermosyphon reboiler is investigated at subatmospheric pressures and low heat fluxes. This paper presents detailed experimental data obtained using Wire Mesh Sensor in a gas-liquid flow with heat transfer as well as temperatures, pressures and recirculation rates around the loop. Flow regimes which have been previously identified in other systems were detected. The nature of the instability which underpins the mechanisms involved and conditions aiding instability are reported. Churn flow pattern is persistently detected during instability. The nature of the instability and existence of oscillatory churn flow are interconnected Elsevier 2016-08-22 Article PeerReviewed Agunlejika, Ezekiel O., Langston, Paul A., Azzopardi, Barry J. and Hewakandamby, Buddhika N. (2016) Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability. Applied Thermal Engineering, 109 (A). pp. 739-745. ISSN 1873-5606 Horizontal thermosyphon reboiler; Geysering instability; Subatmospheric boiling; Start-up; Wire Mesh Sensor; Two-phase heat transfer http://www.sciencedirect.com/science/article/pii/S135943111631496X doi:10.1016/j.applthermaleng.2016.08.135 doi:10.1016/j.applthermaleng.2016.08.135 |
| spellingShingle | Horizontal thermosyphon reboiler; Geysering instability; Subatmospheric boiling; Start-up; Wire Mesh Sensor; Two-phase heat transfer Agunlejika, Ezekiel O. Langston, Paul A. Azzopardi, Barry J. Hewakandamby, Buddhika N. Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability |
| title | Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability |
| title_full | Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability |
| title_fullStr | Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability |
| title_full_unstemmed | Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability |
| title_short | Subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: Instability |
| title_sort | subatmospheric boiling study of the operation of a horizontal thermosyphon reboiler loop: instability |
| topic | Horizontal thermosyphon reboiler; Geysering instability; Subatmospheric boiling; Start-up; Wire Mesh Sensor; Two-phase heat transfer |
| url | https://eprints.nottingham.ac.uk/37037/ https://eprints.nottingham.ac.uk/37037/ https://eprints.nottingham.ac.uk/37037/ |