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风能是指空气流动所产生的动能。风是地球上的一种自然现象,它是由太阳辐射热引起的。太阳光照射到地球表面,地球表面各处受热不同,产生温差,从而引起大气的对流运动,形成风。据估计,到达地球的太阳能中虽然只有大约2%转化为风能,但其总量仍是十分可观的。据世界气象组织估计,全球的风能约为2.7×10~9兆瓦,其中可利用的风能为2×10~7兆瓦,比地球上可开发利用的水能总
Wind energy refers to the kinetic energy generated by the flow of air. Wind is a natural phenomenon on the earth. It is caused by the radiant heat of the sun. Sunlight shines on the surface of the earth, and the heat on the surface of the earth is different, resulting in a temperature difference, which causes the convection of the atmosphere and the formation of wind. It is estimated that although only about 2% of the solar energy reaching the earth is converted into wind energy, the total amount is still very considerable. According to the estimation of the World Meteorological Organization, the global wind energy is about 2.7×10~9 MW, and the available wind energy is 2×10~7 MW, which is more than the total amount of hydropower that can be exploited and used on the earth.