地热能相比其他新能源好像低调很多。人类早就将眼光放到了宇宙,却忽略了自己脚下的大地也有着巨大的能量。虽然人类很早以前就开始利用地热能,如利用温泉沐浴、医疗,利用地下热水取暖、建造农作物温室、水产养殖及烘干谷物等。直到20世纪中叶,人们才开始真正认识地热资源。人们发现地球内部很深处具有非常高的温度,这样巨大的热能,通过大地的热传导、火山喷发、地震、深层水循环、温泉等途径不断地向地表散发。 Geothermal energy seems a lot lower than other new energy sources. Mankind has long set its sights on the universe, ignoring the great energy of the earth under his own feet. Although humans have been using geothermal energy long ago, such as hot spring bathing, medical treatment, the use of underground hot water to heat their homes, the construction of greenhouse crops, aquaculture and drying of cereals. It was not until the mid-20th century that people began to really understand geothermal resources. People find that there is a very high temperature inside the earth, so that huge heat energy is continually released to the earth through heat conduction through earth, volcanic eruptions, earthquakes, deep water circulation and hot springs.