Because at a certain depth of the earth's surface, its temperature is almost constant, at around 17 degrees. Using the higher temperature of water from deep wells to provide heat for underfloor heating can save energy to a large extent. Geothermal wells refer to methods and devices for generating electricity using geothermal energy or hot spring water with water temperature above 30°C at a depth of approximately 3,500 meters. Geothermal heat is divided into three categories: high temperature, medium and low temperature. .
Uses of geothermal wells: 1. Most people will think of hot spring baths first, but there is much more to geothermal heat than just these uses. Geothermal energy is divided into three categories: high temperature, medium temperature and low temperature. Above 150℃, it existste in the form of steam, which is high temperature geothermal energy; between 90℃ and 150℃, it exists in the form of a mixture of water and steam, which is a medium temperature geothermal energy; above 25℃ and below 90℃, it is in the form of warm water, warm water, etc. It exists in the form of hot water, hot water, etc., which belongs to low temperature geothermal heat.
2. High temperature geothermal energy is suitable for electricity generation. Medium temperature geothermal energy can produce electricity and can also be used for heating homes. Low temperature geothermal energy can be used for bathing, medical treatments, heating. greenhouse planting, aquaculture, etc.
3. First consider using it for electricity generation. Geothermal power plants using medium-temperature geothermal water as energy are not uncommon abroad. A unit using geothermique at 72°C to produce electricity was built in Alaska, United States. There is also a medium temperature power plant in Tengchong, Yunnan, China.
4. Geothermal wells can also be used for heating. In addition to being environmentally friendly and energy efficient, geothermal heating is technically simple and easy to implement, and has a wide range of temperature requirements. It can be used in a temperature range of 15°C to 180°C. Underground hot water at 103°C can be directly used for heating services without heating.
5. Geothermal energy must be used in a “cascading” manner, so that geothermal resources can be “fully utilized.” The first stage is used for heating, the second stage is sent to the hot source; fishing center to provide underfloor heating; The third step is aquacultureture, then it is driven to the hot spring planting and picking base for planting and irrigating special vegetables, flowers and various fresh fruits, and then it is discharged into the hot lake; spring park so that it does not freeze in winter and the green water is always clear.