"Geothermal +" : a new card of Green China

Geothermal heating and cooling have unique advantages. This is partly due to its wide distribution. According to the latest resource evaluation results of the China Geological Survey, the shallow geothermal energy resources of 336 cities at or above the prefecture level can be mined annually equivalent to 700 million tons of standard coal, which is used for building heating, and can achieve 32.3 billion square meters of heating area in winter and 32.6 billion square meters of cooling area in summer. The areas suitable for the development of shallow geothermal energy are mainly distributed in the central and eastern parts of the country, including Beijing, Tianjin and other places. On the other hand, the core technology of geothermal heating and cooling is not difficult, the cost is relatively low, and it is convenient and economical and practical.

In April 2017, the national New area Xiongan New Area was born, its goal is to build "blue and green interwoven, fresh and bright, water city integration, multi-group intensive and compact development of ecological city", mainly geothermal energy, multi-energy complementary heating scheme was first proposed, and "to create a global geothermal utilization model" as one of the goals. Accordingly, more than two months later, the geological survey to support the planning and construction of Xiongan New Area was officially launched. On August 23 of that year, the results of the first stage were announced: the geological conditions of Xiongan New Area are superior, and the conditions for the development and utilization of shallow geothermal energy in the area are suitable, which can meet the heating and cooling needs of about 100 million square meters of building area.

As an important part of Xiongan New Area, the former Xiongxian County in Hebei Province has been at the forefront of the country in the development and utilization of geothermal energy, as early as 2006, the county was named "China's hot spring Town" by the Ministry of Land and Resources and other institutions. In 2009, Xiongxian County signed a strategic agreement with Iceland and Sinopec to vigorously introduce advanced technology and develop geothermal central heating. In the past few years, nearly 80 geothermal Wells have been dug in Xiongxian, and the urban geothermal heating area has reached 2.7 million square meters, accounting for 92% of the total area of central heating, replacing 90,000 tons of standard coal annually, reducing 189,900 tons of carbon dioxide, 0.48 million tons of sulfur dioxide, and 11,900 tons of dust, making positive efforts and contributions to improving urban air quality. Xiongxian has become a "smoke-free city" for heating, and has formed a geothermal energy utilization pattern of "government-led, government-enterprise cooperation, advanced technology, environmentally friendly, and benefiting the people". These accumulated rare experience for Xiongan New area development and utilization of geothermal energy heating and cooling.

According to statistics, by the end of 2015, China's shallow geothermal heating area was nearly 400 million square meters, and the area of hydrothermal geothermal heating was more than 100 million square meters. With the enhancement of winter heating demand in southern China and the further maturity and perfection of shallow and hydrothermal geothermal energy heating technology, the application scope of shallow geothermal energy will be expanded nationwide. According to the "13th Five-Year Plan" for the development and utilization of geothermal energy, during the "13th Five-Year Plan" period, China's new geothermal energy (cooling) includes 700 million square meters of new shallow geothermal energy heating (cooling) area and 400 million square meters of new hydrothermal geothermal heating area.

Beijing Flower Harbor is a model of geothermal horticulture

In Yangzhen, Shunyi District, northeast of Beijing, there is an "International flower port" with a master plan of 4 square kilometers. As a flower production, research and development, display and trading center in Beijing, flower leisure and tourism and cultural exchange center, here was the main project of the 7th China Flower Expo in 2009, every year will hold tulip festival, moon season, Chrysanthemum festival, Spring Festival night flower exhibition. When tourists wander in the sea of flowers, they may have a thought: why can so many flowers that can thrive in different geographical environments bloom brilliantly in the Port of Flowers? The answer is not complicated, that is, the International flower port has adopted the "geothermal + flowers" model.

It is understood that in order to solve the problems of greenhouse and building heating, and highlight the purpose of green, scientific and technological, circular and intensive construction of the park, the International Flower Port has completed the shallow geothermal energy test, water resources demonstration and geothermal geophysical exploration on the basis of site research to the National Northern plant Base, UFyou Software Park, Huaqing Group and other places, after more than 10 expert discussions and demonstration meetings. Finally, the heating form based on geothermal step utilization, supplemented by ground source heat pump and water source heat pump, combined with gas peak regulation is determined. Although the heating method has a large initial investment, compared with the conventional heating method, it has the characteristics of no pollution, zero emission, renewable energy, low system operation cost, and obvious environmental protection and energy saving. It is through the large-scale use of geothermal comprehensive technology, precise adjustment of temperature and humidity and other parameters, to achieve the modern agricultural miracle of "all the world flowers in the port" and "flower Expo will never end".