Geothermal radiant heating, referred to as floor heating, is a heating method in which hot water or heating cables whose temperature is not higher than 60 degrees Celsius are buried in a coil system under the geothermal floor to heat the entire ground, and radiate heat to the room evenly through the ground. . Compared with traditional heating methods, geothermal radiant heating has many characteristics such as comfort, energy saving and environmental protection. In foreign countries, this technology is not only widely used in civil residences and various public buildings such as hospitals, shopping malls, office buildings, gyms and swimming pools, but also widely used in heat preservation of building systems such as flower beds, factories, football fields, hangars and vegetable greenhouses. It is even applied to the insulation of outdoor roads, roofs, stairs, airport runways and various industrial pipelines. More than 50% of new buildings in developed countries such as South Korea, Japan, Europe and the United States have adopted geothermal radiant heating.
Floor heating is also a new type of heating method that has begun to emerge in the area north of the Yellow River in China in recent years. Its application has been quite extensive in China's Shandong, Tianjin, Northeast, Inner Mongolia, Hebei and other places. For example, in Tianjin City, ground heating has accounted for 40% of new buildings and is generally welcomed by residents. The Chinese government has listed floor heating as a key building energy-saving technology to be promoted and applied. From the perspective of development prospects, in the future, more than 60% of residential heating will be ground heating. The application prospects are gratifying and there is a huge development market.
The heating method that uses low-temperature hot water to radiate heat upward has many advantages compared with the ordinary radiating air heating method:
The first is to meet the comfort requirements of human physiological heating: let the warmth from the feet, people will feel warmer and more comfortable;
The second is to save indoor area and space: the space occupied by the installation of radiators and heating pipes can be omitted, and the usable area can be increased by 2% to 3%;
The third is to make the indoor heating temperature uniform: after the floor heating is used, the room temperature is distributed from the bottom to the top, the air convection is weakened, and the water loss is reduced, which overcomes the shortcomings such as dry mouth caused by the radiator heating;
Fourth, there are a wide range of heat sources, such as underground hot water, industrial waste heat, heat supply pipe network, domestic heat supply, etc.;
The fifth is energy saving and money saving: Compared with other heating methods, geothermal radiant heating has a relative Rayleigh number Ra<1, almost no air convection up and down, a gradient distribution of room temperature from bottom to top, the lowest ceiling temperature, and the energy saving rate is about 20%. Using zoned temperature control device, the energy saving range can reach 40%;
The sixth is to increase the thickness of the ground: and the aerated (foam) concrete has a good sound absorption effect, so it has a good floor sound insulation effect.
