This note introduces results of 3 years cooperative research among the Port and Airport Research Institute, Ashikaga Institute of Technology, Hokkaido Institute of Technology and Komaihaltec Inc. for application of the 3ookW sized middle scale wind power generator system for local wind energy utilization of ports, fishery ports and harbors in order to reduce CO2 emission. Following results are obtained;
　(1) 3ookW sized middle scale wind power generator system was developed and installed at the Tokyo Bay coast and proto-type field experiment was conducted.
　(2)Proto-type wind and power generation rate data proved the designed power-curve of the system.
　(3) Small scaled model experiment in a wind flume was also conducted in order to clarify the characteristics of the observed winds on the nacelle of the proto type wind-power-generator. It is concluded that the observed wind speed and direction does not show large difference to the input outside winds, for the mixed effects of the wind energy consumption by the wind-fan and the wind concentration due to the nacelle shape.
　(4)Energy demand investigation to the 5 ports and fishery ports in Japan-Sea coast of Hokkaido-Island was conducted. It is clarified that 300kW sized wind-power generator system is able to satisfy the total annual demands of the electricity of some ports and fishery ports.