Abstract

Research into wind power as a source of low-cost energy has proved its efficiency for some regions of the developing world, however, the potential applications have been limited due to a lack of research interest in this field. A low-speed, high-torque, vertical-axis wind rotor designed in Ethiopia for water pumping applications will be tested for its effectiveness in Botswana for pumping water from deep (60-100 m) and shallow (10-20 m) wells.

Post-Project Summary

Research work in this project was conducted by two nonprofit associations: the Rural Industries Innovation Centre (RIIC) and the Pelegano Village Industries (PVI). An IDRC consultant assisted with project activities. The two associations worked independently to produce and install two Filippini rotors each, which were designed to work with differing windmill pumping systems. Data was collected on wind speed and patterns, and their relationship to pumping output. Researchers also developed an instantaneous recording apparatus for wind speed and wind gust measurement, which provided more detailed recordings. Studies showed that while the locally produced Filippini windmill was suited for providing small to medium-scale water supplies, its pumping capacity was comparable to that of existing windmills. Furthermore, the Filippini windmill incurred high cost due to structural requirements. Researchers concluded that the windmill as originally designed was not appropriate for conditions in Botswana. An extension of three months was given to allow further work on the wind tunnel testing of the vertical-axis Filippini rotor with a view to developing a suitable high wind protection system. Some progress was made.

Recipient Institution(s)