"Geothermal +" : a new card of Green China

Most of the geothermal energy is deeply buried underground, in addition to volcanic eruptions or some places shallow heat can be directly perceived by people, the rich internal heat can only be recognized and utilized by people through drilling and other ways. Since the founding of the People's Republic of China, especially in the past 40 years of reform and opening up, Chinese scientists have not only figured out the distribution of geothermal resources in China and drawn detailed "geothermal maps", but also made outstanding achievements in the development and utilization of geothermal resources, converting geothermal energy into electricity, using geothermal energy for heating and cooling, and closely integrating it with agriculture and other industries. Create a rich and colorful "geothermal +" model, and make it a bright "green business card" of China.

Xizang Yangbajing geothermal power station is well known overseas

On the map of geothermal resources distribution in China, we can see that a large part of the Tibet Autonomous Region is painted "fire red", which is an important part of the internationally famous "Mediterranean - Himalayan geotropics", and is one of the main display zones of the earth's internal thermal activities on the land surface, where the heat storage temperature can reach more than 150 ~ 200℃. China's world-famous Yangbajing geothermal power station in Xizang Province is located on this display belt.

In the 1970s, the Tibet Autonomous Region chose to build the Yangbajing geothermal power Station in Dangxiong County, northwest of Lhasa. At an altitude of 4306 meters, the geothermal field is 200 meters deep, and the geothermal steam temperature reaches 172℃. In October 1977, experimental Unit 1 was built and started trial operation. In 1978, the Yangbajing geothermal power Station met the design requirements. After that, the installed capacity was further expanded, and by 1991, the power station had completed the construction of eight 3,000 kilowatt units with an installed capacity of about 24,000 kilowatts. Under the support of the "medium and low temperature geothermal power generation Project" of the National High-tech Research and Development Program (863 Program), the "screw expansion generator set" of China's independent intellectual property rights was applied to the Yangbajing geothermal power Station twice in 2008 and 2010, which further improved its performance and efficiency.

Yangbajing geothermal Power Station is the highest geothermal power station in the world, creating an international precedent for the use of low-temperature geothermal power generation, and occupies an important position in the development and utilization history of new energy in the world. Since its completion and operation, the Yangbajing Geothermal Power Station has been generating electricity safely and stably. By 2017, the cumulative power generation of the station had exceeded 3 billion KWH, making outstanding contributions to Tibet's economic and social development and environmental protection.

In recent years, China has made new progress in the field of geothermal power generation. On November 25, 2016, the first well of the Dimet geothermal power generation project in Dehong Dai Jingpo Autonomous Prefecture of Yunnan was drilled, and the first unit was successfully connected to the grid in less than eight months. In 2017, Sichuan Kangding small hot water geothermal field was drilled into a high-temperature hot well, and a 200-kilowatt generator set was successfully installed. The 13th Five-Year Plan for the development and utilization of geothermal energy proposes that the newly installed capacity will reach 500,000 kilowatts in 2020. By then, geothermal power generation is expected to make greater contributions to the "greening" of China's energy production and use.

Xiongan New Area leads the construction of geothermal heating and cooling

Many people may still remember the "gas shortage" caused by the lack of natural gas supply in the winter of 2017. Abandoning coal for heating and switching to natural gas can indeed reduce air pollution to a large extent, but the premise of the "coal to gas" clean heating project is a sufficient supply of natural gas. Is there a greener, more economical and convenient way of heating? A lot of people are looking at geothermal energy.

The principle of geothermal heating (cooling) is not complicated, simply put, through the ground source heat pump and deep buried in the pipeline system around the building, winter from the soil or water "extract" heat, sent to the building; Summer "takes away" the heat in the building and releases it into the water or soil to achieve the purpose of cooling the building interior. As far as geothermal refrigeration is concerned, there is also a way called "absorption refrigeration", that is, the thermal energy provided by geothermal steam or geothermal water as a heat source is driven by the absorption refrigeration equipment.