Axial Flow Wind Air -Turbine NU-102 with Electric Eddy-Current Brake

• Main Author: Seiiti Awano
• Format: Report
• Language: English
• Published: College of Science and Technology, Nihon University 1979
• Subjects: Syowa Station; Antarc*; Antarctica; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=23; http://id.nii.ac.jp/1291/00000023/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=23&item_no=1&attribute_id=18&file_no=1

"A new axial-flow wind air-turbine NU-102 having an external diameter of 1.2 m was developed in 1977 by the authors for harnessing the energy of high speed winds in Antarctica. This multi-blade wind-turbine is featured by the presence of a stator before the rotor, which enables the turbine to give a higher power, a higher torque at a lower rotational speed than an ordinary wind air-turbine. A 3-kW AC-DC generator is driven by the air-turbine through a planetary speed-up gear of speed ratio 6. The rotational speed of this generator can automatically be kept at a desired value even in violent blizzards by means of an electric eddy-current brake newly developed by the authors. The brake also affords a new means for converting the wind energy directly into heat through the liquid heated in the jacket of the brake-stator. The present report describes the design of the whole system, the general perormance of the air-turbine, and the combined performance of the wind-turbine and generator evaluated in wind-tunnel tests and field tests at Syowa Station. The field tests have proved that a generator output of 2.4 kW can be obtained at a wind velocity of 30 m/s, and that the rotational speed of the generator can be kept at a desired value for variable loads and wind velocities exceeding 30 m/s."