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For personal use only in study and research; not for commercial useFor personal use only in study an

仅供参考 F o r p e r s o n a l u s e o n l y i n s t u d y a n d r e s e a r c h ; n o t f o r c o m m e r c i a l u s e F o r p e r s o n a l u s e o n l y i n s t u d y a n d r e s e a r c h ; n o t f o r c o m m e r c i a l u s e 薇 Wind power 薃节 肂 Wind power is the conversion of into auseful form of wind energy 蒀袀 energy, such as using to make electricity, for wind turbineswind mills mechanical power, for or ,or to wind pumpspumping waterdrainagesails propel ships. 羇 At the end of 2009, worldwide of wind-powered nameplate capacity 莄莅 generators was 159.2 (GW).(By June 2010 the capacity had risen to gigawatts 175 GW.) Energy production was 340 TWh, which is about 2% of worldwide electricity usage; and has doubled in the past three years. Several countries have achieved relatively high levels of wind power penetration, such as 20% of stationary electricity production in ,14% in and , DenmarkIrelandPortugal 11% in ,and 8% in in 2009. As of May 2009, 80 countries SpainGermany around the world are using wind power on acommercial basis. 不是用于商业用途