Engineered-airlift pumps for aquaculture applications using multiphase flow analysis |
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| Institution: | 1. School of Engineering, University of Guelph 50 Stone Rd E, Guelph, Canada;2. FloNergia Inc., 994 Zelco Dr, Burlington, Canada;1. Fachbereich Technik, Fachhochschule Westküste, 25746 Heide, Germany;2. Gesellschaft für Marine Aquakultur, Hafentörn 3, 25761 Büsum, Germany;3. Institute of Animal Breeding and Husbandry, Christian-Albrechts-Universität zu Kiel, Hermann-Rodewald-Straße 6, 24118 Kiel, Germany;4. Thünen Institut für Fischereiökologie, Wulfsdorfer Weg 204, 22926 Ahrensburg, Germany;1. Faculty of Mechanics, Kim Il Sung University, Pyongyang, Democratic People''s Republic of Korea;2. Faculty of Mathematics, Kim Il Sung University, Pyongyang, Democratic People''s Republic of Korea;1. Department of Biological and Environmental Engineering, Cornell University, Riley Robb Hall, Ithaca, NY 14853, USA;2. Aquaculture Systems Technology, New Orleans, LA, USA;3. Department of Mechanical and Aerospace Engineering, Cornell University, Grumman Hall, Ithaca, NY 14853, USA;1. Department of Biological and Environmental Engineering, Cornell University, Riley-Robb Hall, Ithaca, NY 14853, USA;2. The Conservation Fund, Shepherdstown, WV 25443, USA |
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| Abstract: | Currently, very few aquaculture operations are employing airlift pump technology for water recirculation, aeration, and waste removal. This is likely due to the poor design and lower efficiency of traditional airlift design, the limited amount of research effort that has been invested in improving performance capabilities of air lift pumps and the general lack of awareness of the industry about the inherent advantages of airlift systems. A new efficient airlift pump is hydrodynamically designed by incorporating the Volume of Fluid (VOF) multi-phase model along with the K-ε turbulence model utilizing Computational Fluid Dynamics (CFD) tools. The pump is designed to offer a substantial reduction in total energy usage as well as an improved quality of the culture products in order to make it attractive to aquaculture industry. In this study, both numerical and experimental investigations were carried out for airlift systems operating under two different submergence ratios of 50% and 90% in a lab setting using 2.54 cm diameter pumps. Also, the performance of a large-scale pumps of 10.16 cm diameters were also tested in an aquaculture raceway to determine its effect on the operation. The numerical results were found to be in agreement with the experiments within ±20% which is considered very reasonable for multiphase flow analysis. The present study was found to present a great tool for modelling the airlift pump performance, and potentially proposing new designs. |
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| Keywords: | Two-phase flow Dual injector Airlift pump Aquaculture system CFD |
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