地热作为一种新能源 ,以其干净、无污染和成本低等优点受到人们的重视。美国于 2 0世纪 70年代建成了世界上第一眼人造热泉 ,每小时可回收 1 49～ 1 56℃的热水 2 0ｔ。法国已开凿了 6眼人造热泉 ,其中 1眼井深 60 0 0ｍ ,每小时可获得 2 0 0℃的热水 1 0 0ｔ。另外 ,美国还在 Geothermal as a new energy source, with its clean, pollution-free and low cost advantages by people’s attention. In the 1970s, the United States built the first man-made hot spring in the world and can recover 20 tons of hot water at a temperature of 1 49-1 56 ℃ per hour. Six man-made artificial hot springs have been drilled in France, of which one is well depth of 60,000 meters and one hundred tons of hot water at 200 degrees Celsius per hour can be obtained. In addition, the United States is still there