NDLI: High speed electromechanical flywheel design for rural electrification in Sub Saharan Africa

Content Provider	IEEE Xplore Digital Library
Author	Okou, R. Mwaba, G. Khan, M.A. Barendse, P. Pillay, P.
Copyright Year	2009
Description	Author affiliation: Department of Electrical Engineering, University of Cape Town, Rondebosch, 7701 South Africa (Okou, R.; Mwaba, G.; Khan, M.A.; Barendse, P.) \|\| Department of Electrical and Computer Engineering, Concordia University, Montreal, Quebec, Canada H4G 2M1 (Pillay, P.)
Abstract	This paper presents the electromechanical flywheel energy storage system designed to enhance rural electrification in Sub-Saharan Africa. Most non-grid connected areas, mostly rural, are powered with solar home systems whose sustainability is limited by the short life span, low power density and low storage efficiency of the battery storage. The electromechanical flywheel rotor is made from glass fiber and epoxy composite and designed using novel shape profiles based on Berger, Porat and Stodola's design. Dr. Stodola's design utilizes a stress based solution by introducing a central hole for a shaft inclusion. An Axial flux brushless DC machine was considered because of the low cost, ease of construction and simple control. The system stores 1,080kJ and supplies 100W with an operating speed range of 8,000–25,000 rpm. Stress, modal and thermal analysis are performed on the flywheel system using finite elements and analytical methods. The brushless DC drive together with the DC-DC converter were constructed and tested. The various components were simulated, prototyped using locally available material and the results presented.
Starting Page	392
Ending Page	398
File Size	1133449
Page Count	7
File Format	PDF
ISBN	9781424442515
DOI	10.1109/IEMDC.2009.5075236
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-05-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Flywheels Africa Thermal stresses Performance analysis Energy storage Batteries Glass Shape Shafts DC machines
Content Type	Text
Resource Type	Article

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