Host: Science Council of Japan
Co-host: Architectural Institute of Japan, Japan Association for Wind Engineering, The Institute of Electrical Engineering of Japan, Japanese Society of Steel Construction, Japanese Society of Civil Engineering, Meteorological Society of Japan
Pages 000083
A hybrid energy generating system that can use both solar energy and wind energy is proposed. The outlook of this system is like a flower having several pedals. In sunny days, it opens and assembles solar energy by the mirror surface of panels, while in cloudy and windy days it closes and rotates to transfer wind power into electric power. The performances of two different prototypes (Type A and Type B) as electric generator are examined by wind tunnel tests. Type A is composed of six panels (50cm×10cm). Type B is composed of twelve panels (50cm×12cm) with six of them located inside and the other six located outside. The surfaces of the panels have parabolic shape to focus solar radiation at one point. The parameters of the wind tunnel tests are wind speed (3m/s∼20m/s), panel angle (15°∼83°), measured from base line on rotating circle and inclined angle of rotating axis (-30°∼ +30°). As experimental results of Type A, the number of revolutions per minute (RPM) increases proportional by to the square of the wind velocity and Type B, RPM increases linearly by to the wind velocity. The maximum RPM are obtained at the case of panel angle = 60°for Type A, outside panels angle = 60°and inside panels angle = 30°for Type B, respectively. The maximum electric power is 80W in the case of 15m/s for Type B. RPM decreases by about 10% when the inclined angle is in the range of -30°, +30°.
