small wind turbines in sustainable urban environment ashikaga institute of technology prof dr izumi ushiyama abstract recent years the importance renewable energy such as solar biomass hydro etc has been increasing because need to prevent global warming and reduce harmful substances especially a cumulative capacity large scale power plants are more than 5x10 4 mw equivalent 50 units nuclear world 10 3 japan these installed mainly strong areas however from 100w 10kw classes where blows not so naturally entered into symbol environmental era there six thousands systems operating moreover utilize complementary effect between many used hybrid combined with pv panels ultimate plant even triple system consist is at our goal real society future
