Study of Performance Characteristics of Small Submersible Pump Run as Hydro Turbine Generator

Kiprop Eliud^1, , Nicholas M. Musembi¹, Dickson Kindole¹, Alfred Mukama¹, Sam K. Kosgei¹, Yasuyuki Nemoto² and Yuichi Nakajo²

¹Graduate school of Engineering, Ashikaga Institute of Technology, Ashikaga City, Japan

²Division of Renewable Energy and Environment, Ashikaga Institute of Technology, Ashikaga City, Japan

Cite this paper:
Kiprop Eliud, Nicholas M. Musembi, Dickson Kindole, Alfred Mukama, Sam K. Kosgei, Yasuyuki Nemoto and Yuichi Nakajo. Study of Performance Characteristics of Small Submersible Pump Run as Hydro Turbine Generator. Sustainable Energy. 2017; 5(1):1-5. doi: 10.12691/rse-5-1-1

Abstract

Pumps including submersible types can be used as alternative micro-hydro turbines with minimal technical changes and at a lower cost compared to conventional turbines. However, pump manufacturers do not normally provide the characteristics curves of their pumps working as turbines. Therefore, establishing a relationship between performances of direct (pump) and reverse (turbine) modes is essential in selecting the proper machine for application. For the purpose of realizing the low cost micro hydropower, the authors modified a low cost submersible electric powered pump rated at 250W and converted it to a micro hydro turbine generator. The performance characteristics of this hydro turbine were tested at various conditions of water flow rate, excitation capacitors and load. The input was measured by using flow meter and pressure gauges while the electrical output was measured by using a power analyzer. The maximum electrical output power generated was 207W at water input power of 986.9W and head of 17.97m. The maximum efficiency operating as a pump was 24.57% while on the hydro turbine generator mode it was 22.02%.

Keywords:
submersible pump performance characteristics hydro turbine generator

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References:

[1]	REN21.2014. Renewables 2014 Global Status Report.
[2]	S. Derakhshan and A. Nourbakhsh, Experimental study of characteristics of curves of centrifugal pumps working as turbines in different specific speeds, Experimental Thermal and Fluid Science, 32(2008). 800-807.
[3]	J. Furze, Compendium in Small Hydro, University of Aarhus, Faculty of Science, Law and Economics, Ebeltoft Denmark, 2000/2002.
[4]	A. Nourbakhsh, G. Jahangiri, Inexpensive small hydropower stations for small areas of developing countries, in: Conference on Advanced in Planning-Design and Management of Irrigation Systems as Related to Sustainable Land use, Louvain, Belgium, 1992, pp. 313-319.
[5]	A. Williams, Pumps as Turbines Users Guide, Intermediate Technology Publications, London, 1995.
[6]	S. Derakhshan and A. Nourbakhsh, Theoretical, Numerical and Experimental Investigation of Centrifugal Pump in Reverse Operation, Journal of Experimental thermal and Fluid Sciences, 32(2008). 1620-1627.
[7]	H. Nautiyal, V. Varun, A. Kumar and S. Yadav, Experimental Investigation of Centrifugal Pump Working as Turbine for Small Hydropower Sytems, Journal of Energy Science and Technology, Vol. 1, No. 1 (2011). 79-86.
[8]	N. Smith, Motors as Generators for Micro Hydro Power, Practical Action, Intermediate Technology Publications, London, 2008.