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Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect

Sloshing is the movement of fluid in a partially filled vessel subjected to external motions. Although sloshing causes intense forces and instability to floating structures, the internal motion of liquid caused by external forces might be useful for devices that require mixing. For offshore floating...

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Main Authors: Khor, Wei Han, Goh, Jie Heng, Yew, Qi Ming, Kang, Hooi-Siang, Lim, Jun-Wei, Iwamoto, Koji, Tang, Collin Howe-Hing, Lee, Kee-Quen, Wu, Yun-Ta, Goh, Pei Sean
Format: Article
Published: Institution of Chemical Engineers 2023
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TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/105923/
http://dx.doi.org/10.1016/j.cherd.2023.09.014
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spelling my.utm.1059232024-05-26T09:10:18Z http://eprints.utm.my/105923/ Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect Khor, Wei Han Goh, Jie Heng Yew, Qi Ming Kang, Hooi-Siang Lim, Jun-Wei Iwamoto, Koji Tang, Collin Howe-Hing Lee, Kee-Quen Wu, Yun-Ta Goh, Pei Sean TJ Mechanical engineering and machinery Sloshing is the movement of fluid in a partially filled vessel subjected to external motions. Although sloshing causes intense forces and instability to floating structures, the internal motion of liquid caused by external forces might be useful for devices that require mixing. For offshore floating photobioreactors, sloshing induced by external ocean wave forces are desirable, as the movement of liquid is able to bring about mixing and mass transfer for the nutrients and gas in the microalgae culture. The objective of this study is to investigate the correlation between the regular wave-induced sloshing of different motions (surge, heave, and pitch) on the mixing behaviour of the novel offshore floating photobioreactor designed to utilize the ocean surface waves for the effects of mixing. To determine the residence time distribution (RTD) of the stagnant volume of the photobioreactor, dissolved solids were injected into the system. The concentration of dissolved solids was measured using a total dissolve solid (TDS) sensor. The mixing caused by sloshing motion had the highest intensity during pitching motion. A homogenous solution was formed just after 65.9 s for the filling ratio of 30 %, with the rotation angle of 8 degrees and frequency of 0.21 Hz. Thus, wave-induced sloshing is able to generate intense mixing to the medium during pitching motion but still has non-ideal behaviours, such as bypass and dead zones during horizontal and vertical motion. Institution of Chemical Engineers 2023 Article PeerReviewed Khor, Wei Han and Goh, Jie Heng and Yew, Qi Ming and Kang, Hooi-Siang and Lim, Jun-Wei and Iwamoto, Koji and Tang, Collin Howe-Hing and Lee, Kee-Quen and Wu, Yun-Ta and Goh, Pei Sean (2023) Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect. Chemical Engineering Research and Design, 198 (NA). pp. 340-348. ISSN 0263-8762 http://dx.doi.org/10.1016/j.cherd.2023.09.014 DOI : 10.1016/j.cherd.2023.09.014
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Khor, Wei Han
Goh, Jie Heng
Yew, Qi Ming
Kang, Hooi-Siang
Lim, Jun-Wei
Iwamoto, Koji
Tang, Collin Howe-Hing
Lee, Kee-Quen
Wu, Yun-Ta
Goh, Pei Sean
Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect
description Sloshing is the movement of fluid in a partially filled vessel subjected to external motions. Although sloshing causes intense forces and instability to floating structures, the internal motion of liquid caused by external forces might be useful for devices that require mixing. For offshore floating photobioreactors, sloshing induced by external ocean wave forces are desirable, as the movement of liquid is able to bring about mixing and mass transfer for the nutrients and gas in the microalgae culture. The objective of this study is to investigate the correlation between the regular wave-induced sloshing of different motions (surge, heave, and pitch) on the mixing behaviour of the novel offshore floating photobioreactor designed to utilize the ocean surface waves for the effects of mixing. To determine the residence time distribution (RTD) of the stagnant volume of the photobioreactor, dissolved solids were injected into the system. The concentration of dissolved solids was measured using a total dissolve solid (TDS) sensor. The mixing caused by sloshing motion had the highest intensity during pitching motion. A homogenous solution was formed just after 65.9 s for the filling ratio of 30 %, with the rotation angle of 8 degrees and frequency of 0.21 Hz. Thus, wave-induced sloshing is able to generate intense mixing to the medium during pitching motion but still has non-ideal behaviours, such as bypass and dead zones during horizontal and vertical motion.
format Article
author Khor, Wei Han
Goh, Jie Heng
Yew, Qi Ming
Kang, Hooi-Siang
Lim, Jun-Wei
Iwamoto, Koji
Tang, Collin Howe-Hing
Lee, Kee-Quen
Wu, Yun-Ta
Goh, Pei Sean
author_facet Khor, Wei Han
Goh, Jie Heng
Yew, Qi Ming
Kang, Hooi-Siang
Lim, Jun-Wei
Iwamoto, Koji
Tang, Collin Howe-Hing
Lee, Kee-Quen
Wu, Yun-Ta
Goh, Pei Sean
author_sort Khor, Wei Han
title Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect
title_short Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect
title_full Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect
title_fullStr Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect
title_full_unstemmed Residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect
title_sort residence time distribution of an offshore floating photobioreactor under hydrodynamic sloshing effect
publisher Institution of Chemical Engineers
publishDate 2023
url http://eprints.utm.my/105923/
http://dx.doi.org/10.1016/j.cherd.2023.09.014
_version_ 1800714776981012480
score 13.211869

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