Geothermal well heating principle is: the heat of the building is absorbed from deep underground, separated by a heat exchanger, and then through the heater or heat pump indoor circulation, the indoor temperature gradually rise, heating heating system arrangements such as pumps, water pipes, temperature controllers and automatic control systems are also installed accordingly to the components.
Geothermal wells refers to the well depth of about 3500 meters of geothermal energy or water temperature greater than 30 ℃ of the hot spring water to power generation methods and devices, geothermal heat is divided into high temperature, moderate temperature and low temperature three categories. Higher than 150 ° C, in the form of steam, is a high-temperature geothermal; 90 ° C to 150 ° C, in the form of a mixture of water and steam, etc., is a medium-temperature geothermal; higher than 25 ° C, lower than 90 ° C, in the form of lukewarm water, warm water, hot water, etc., is a low-temperature geothermal.
Geothermal wellhead device is the most basic wellhead equipment in the development of geothermal wells, is necessary to maintain the normal operation of geothermal well production, hot water dynamic monitoring, to prevent accidents due to the expansion and contraction of well tubes and the ground down to reduce the corrosive effect of hot water. With the gradual development of geothermal utilization. Geothermal well wellhead device is gradually standardized. In order to prevent the geothermal water in the wellhead and air contact, reduce the geothermal water in the oxygen and chlorine ions in the joint action of the corrosive hazards of water transmission equipment.
The main use of geothermal wells;
1, the general public will first think of hot springs bathing, geothermal far more than these simple uses. Geothermal is divided into three categories: high temperature, medium temperature and low temperature. Higher than 150 ° C, in the form of steam, is a high-temperature geothermal; 90 ° C to 150 ° C, in the form of a mixture of water and steam and other forms of existence, is a medium-temperature geothermal; higher than 25 ° C, lower than 90 ° C, in the form of lukewarm water, warm water, hot water, and other forms of existence, is a low-temperature geothermal.
2. High-temperature geothermal heat is suitable for power generation, medium-temperature geothermal heat can be used for power generation and heating of houses, and low-temperature geothermal heat can be used for bathing, medical treatment, and heating, as well as greenhouse planting and aquaculture.
3, first considered for power generation, in foreign countries to the medium temperature geothermal water as the energy source of geothermal power station is not uncommon, the United States Alaska has been built with 72 ℃ geothermal water power generation unit. In China's Yunnan Tengchong, there is also a medium temperature power station.
4, geothermal wells can also be used for heating. In addition to environmental protection, energy saving, geothermal heating technology is simple and easy to implement, the temperature requirements are also relatively broad, from 15 ℃ ~ 180 ℃ temperature range can be utilized. And 103 ℃ of underground hot water, just can be exempted from heating, led directly to the heating system for heating services.
Refer to Baidu Encyclopedia - Geothermal Well