A laboratory study of square velocity cap in water extraction from the sea

Document Type : Original Article

Authors

1 MSc student, School of Civil Engineering, faculty of engineering, University of Tehran

2 School of Civil Engineering, faculty of engineering, Persian Gulf University, Bushehr, Iran

3 Associate professor, School of Civil Engineering, faculty of engineering, University of Tehran, Tehran, Iran

Abstract

The importance of seawater desalination technology as a supplementary water source or even as the main source of water for different countries is increasing. Deep water intake is one of the different methods of water extraction, which has attracted the attention of various researchers due to its various advantages, including the continuous supply of high-quality water from seawater. To reduce the environmental impact and preserve marine animals, a velocity cap is used at the head of the water intake. The common shape of the velocity cap is square. In this research, several physical tests have been done to investigate the effect of the location and height of the openings, the number of blades of the velocity cap, and the Froude number of the flow approaching the velocity cap on the hydraulic performance of the velocity cap. The results showed that by increasing the number of the blades well as increasing the free distance beneath the velocity cap, the discharge coefficient will be decreased. Additionally, increasing the height of the velocity cap will not have much effect on the inlet discharge. A relation was then proposed for the discharge coefficient of the square-shaped velocity caps.

Keywords

References

  • sherkat Tavasli, A. (2016). Analysis and modeling of marine aquifer structures and case optimization of this structure in Ziarat freshwater aquifer. Master Thesis, University of Tehran, Tehran, Iran. (In Persian).
  • Haji Tabar, M., Abbasi, A., & Hamidi, M. (2021). Investigating the effect of changes in water intake discharge in deep water intakes. Journal of Marine Engineering, 17(33), 97–109. (In Persian).
  • Neary, V. S., & Odgaard, A. J. (1993). Three‐Dimensional Flow Structure at Open‐Channel Diversions. Journal of Hydraulic Engineering, 119(11), 1223–1230. doi:10.1061/(asce)0733-9429(1993)119:11(1223).
  • Hajitabar, M. (2019), Effect of water height in deep water extraction from the sea. Master Thesis, Noshirvani University, Babol, Iran. (In Persian).
  • Pankratz, T. (2004). An overview of seawater intake facilities for seawater desalination. The future of desalination in Texas, Texas, United States.
  • Niazi, M. A., Barzegar, S., Amiri, A. E., & Mokallaf, E. Transient analysis of sea water intake using CFD model. 9th International Congress on Civil Engineering, 8-10 May, 2012, Isfahan University of Technology (IUT), Isfahan, Iran.
  • Voutchkov, N. (2005). SWRO desalination process: On the beach - Seawater intakes. Filtration & Separation, 42(8), 24–27. doi:10.1016/S0015-1882(05)70657-1.
  • Toorang, Z., Rahman, H., & Nayebvali, N. (2013). Investigation of seawater intake alternatives at shores with low slope. 15th Marine industries conference (MIC2013), 29-31 October, 2013, Kish Island, Iran.
  • Voutchkov, N. (2018). Design and Construction of Open Intakes. Sustainable Desalination Handbook, Butterworth-Heinemann, Oxford, United Kingdom. doi:10.1016/b978-0-12-809240-8.00005-8.
  • kumar, V. P., Sundaravadivelu, R., & Murali, K. (2020). Experimental study on wave-structure interaction of an offshore intake well with a curtain wall. Ships and Offshore Structures, 16(9), 931–941. doi:10.1080/17445302.2020.1789033.
  • Naderi, A. (2015). Laboratory investigation of the hydraulic performance of water intake structures from the sea (case study: water intake structure of Sirik Abshirinken factory in Hormozgan province), Master Thesis, Shahid Bahonar University, Kerman, Iran.
  • Hashid, M., Hussain, A., & Ahmad, Z. (2021). Critical submergence for side circular intake in an open channel flow. Journal of Hydraulic Research, 59(1), 136–147. doi:10.1080/00221686.2020.1744749.
  • Hussain, A., Ahmad, Z., & Asawa, G. L. (2010). Discharge characteristics of sharp-crested circular side orifices in open channels. Flow Measurement and Instrumentation, 21(3), 418–424. doi:10.1016/j.flowmeasinst.2010.06.005.
  • Rahmani Firozjaei, M., Behnamtalab, E., & Salehi Neyshabouri, S. A. A. (2019). Numerical simulation of the lateral pipe intake: flow and sediment field. Water and Environment Journal, 34(2), 291–304. doi:10.1111/wej.12462.
  • Christensen, E. D., Eskesen, M. C. D., Buhrkall, J., & Jensen, B. (2014). Analyses of hydraulic performance of velocity caps. 3rd IAHR Europe Congress (IAHR), 14-16 April, Porto, Portugal.
Contributions of Science and Technology for Engineering
Volume 1, Issue 3
September 2024
Pages 43-50

Files

History

  • Receive Date: 16 July 2024
  • Revise Date: 10 August 2024
  • Accept Date: 25 August 2024
  • First Publish Date: 01 September 2024
  • Publish Date: 01 September 2024

Share

How to cite

Statistics