"The earth we live in is a huge thermal reservoir. The normal temperature increase gradient from the surface down is 25 to 30 degrees Celsius per 1,000 meters. The hot spring we know is the use of water as a medium to bring the earth's heat to the surface. Now it can also be used. Drilling methods bring thousands of kilometers of hot water underground to the surface, so shallow geothermal energy and hydrothermal geothermal resources are important clean energy sources for sustainable development.
"At the 2008 Beijing Olympics, the Olympic Village used renewable geothermal energy. Was considered an important part of the Green Olympics. At present, the area of shallow geothermal energy heating and cooling in the Beijing-Tianjin-Hebei area has accounted for 20% of the total area of shallow geothermal energy heating and cooling in the country, which is one of the regions with the highest degree of shallow geothermal energy development in China. Yanqing area has abundant shallow geothermal resources. At present, the temperature of geothermal water outlet water can reach 65 degrees Celsius, which can meet heating requirements, and has obvious advantages in reducing pollutant emissions. "We also hope that through the survey of geothermal resources in Yanqing, we will find the best mining areas, not only for the 2022 Winter Olympics, but also for clean energy for Beijing as a whole and to contribute to the blue sky of the capital "Lei Xiaodong said with emotion during the 2017 Yanqing geothermal survey.