一、国际上对地热资源的基本认识地球内部的高温向地面传导,这就是地热的来源。地热梯度的平均值是25℃/km~2。相应的地球表面的热流平均为50～100kw(t)/km~2。虽然地热是一种再生能源,但是除了活动力强的岩浆地区的地热能外,实际上由于通常由岩石回收热能的速度比地球供给它的速度快,被消耗掉的地热能需要长短不一的一段时间才能得到补充而再供利用。所以,地热资源的利用期间还是有限的,并非无穷无尽。 First, the basic understanding of the global geothermal resources The high temperature inside the earth conduction to the ground, which is the source of geothermal. The average geothermal gradient is 25 ° C / km ~ 2. The corresponding heat flux on the Earth’s surface is 50 ~ 100kw (t) / km ~ 2 on average. Although geothermal energy is a renewable energy source, in addition to the geothermal energy of the magmatic region in the most active area, in fact, geothermal energy consumed due to the heat recovery usually provided by the rock is faster than that supplied by the earth. For some time to be supplemented for reuse. Therefore, the use of geothermal resources is still limited, not endless.