Design of a Pelton Turbine Installed on Centrifugal Pump in Reverse Osmosis System for Energy Recovery

Document Type : Research Article

Author

Payame Noor University - Faculty of Engineering

Abstract

In this work, injector regulating valve and Pelton turbine impeller has been numerically and analytically designed and simulated. The impeller of the Pelton turbine added on the shaft of a high pressure multistage pump which is used in sea water reverse osmosis package to recover a part of input power from rejected flow return back after filter unit. Using ANSYS CFX, flow through the regulating valve for many outlet injector diameters has been numerically simulated to obtain head loss. For the point of operation, dimension of turbine impeller calculated using turbomachinery relations and some experimental data in order to synchronize as much as possible with the pump. The exact point of operation for the pump, turbine and injector obtained by intersecting performance curves of pump and turbine. In order to investigate the results, the full-scale Pelton turbine and regulating valve manufactured with the material of duplex and installed on the pump. Performance test on the site shown about 26% decrease in input power. Because of the affinity relation for turbomachinery, the results can be validated for other point of operation due to change in pump speed.

Keywords

Main Subjects

References

[1]  WWAP (World Water Assessment Program. The United Nations World Water Development Report 4: Managing Water under Uncertainty and Risk. Paris, UNESCO. ), (2012).
[2]  Babran, S. Water crisis in IRAN, Rahbord Quarterly, No. 48, 2008, (In Persian).
[3]  Zh. Zhang, Pelton Turbines, Springer-Verlag Berlin Heidelberg (2009).
[4]  Brekke, H, State of the art of small hydro turbines versus large turbines. Hydro 2005, Villach, Austria. . (2005).
[5]  Parkinson, E., Neury, C., Garcin, H., & Weiss, T. Unsteady analysis of a Pelton runner, with flow and mechanical simulations. Hydro 2005, Villach, Austria. (2005).
[6]  Giesecke, J., & Mosonyi, E. Wasserkraftanlagen (4th Ed.). Berlin: Springer. (2005).
[7]  Angehrn, R. Safety engineering for the 423 MW- Pelton-runners at Bieudron. Proceeding, of the 20th IAHR Symposium, Charlotte, NC. (2000).
[8]  Kvicinsky, S., Kueny, J., Avellan, F., & Parkinson, E. Experimental and numerical analysis of free surface flows in a rotating bucket. Proceedings of the 21st IAHR Symposium on Hydraulic Machinery and Systems, Lausanne, Switzerland. (2002).
[9]  Perrig, A., Avellan, F., Kueny, J., Farhat, M., & Parkinson, E. Flow in a Pelton turbine bucket: Numerical and experimental investigations. Journal of Fluids Engineering, Transactions of the ASME, 128, 350–358. (2006).
[10]   Zoppe´, B., Pellone, C., Maitre, T., & Leroy, P). Flow analysis inside a Pelton turbine bucket. Journal of Turbomachinery, Transactions of the ASME, 128, 500–511, (2006).
[11]  Kubota, T., Xia, J., Takeuchi, H., Saito, T., Masuda, J., & Nakanishi, Y. Numerical analysis of free water sheet flow on Pelton buckets. Proceedings of the 19th IAHR Symposium, Singapore. (1998).
[12]  Parkinson, E., Neury, C., Garcin, H., & Weiss, T. Unsteady analysis of a Pelton runner with flow and mechanical simulations. Hydro 2005, Villach, Austria. (2005)
[13]  Muggli, F., Zhang, Zh., Scha¨rer, C., & Geppert, L. Numerical and experimental analysis of Pelton turbine flow, Part 2: The free surface jet flow. Proceedings of the 20th IAHR Symposium, Charlotte, NC. (2000)
[14]  S. Derakhshan, M. Bagheri Motlagh, E. Abdolahnejad, Numerical and experimental study of the effects of physical and the geometrical parameters on efficiency of a micropelton turbine, Modares Mechanical Engineering, Vol. 14, No. 2, pp. 150-158, (2014) (In Persian).
[15]  I.U. Atthanayake, Analytical Study On Flow Through a Pelton Turbine Bucket Using Boundary Layer Theory, International Journal of Engineering & Technology IJET-IJENS Vol:09 No:09, October (2009).
[16]  Frank, M. White, Fluid Mechanics 2014-2016 McGraw-Hill Education, 7th Edition, (2009).
Amirkabir Journal of Mechanical Engineering
Volume 51, Issue 6
January and February 2020
Pages 1395-1410

Files

Share

How to cite

Statistics