1, low temperature, from the heat source, the transfer of heat from the heat transfer medium to the heat all at low temperature (40-60 °C). Low temperature results in less fuel consumption, less heat loss at low temperatures, less low-temperature fouling, and higher thermal efficiency, which is a natural energy saving.
2, from the ground, heat from bottom to top, in line with the law of heat exchange. Under the same heat dissipation conditions, the same people living in the living space, the floor heating temperature is 2-3 °C higher than other heating methods.
3, radiation is different from conduction, convection heat transfer. Radiation is the transmission of thermal energy through the far-infrared radiation generated by thermal effects. Therefore, low-temperature hot water floor heating radiant heating can save 30-40% compared with other heating methods.
4. Sub-room temperature control of ground radiant heating requires a loop design. It is arranged separately according to the room. Each branch of the manifold is equipped with a flow control valve so that each room can reach the design required flow, thus avoiding the length of the tube. Consistent, resulting in consistent flow, and overheating and waste caused by design flow.
5. After the automatic chamber temperature control is adopted, the temperature control system can automatically close the loop and reduce heat waste. It is estimated that the energy saving will be about 10%.
6, to achieve room temperature control, are automatically completed by the thermostat. The setting and adjustment of temperature is very convenient. Unlike most central heating systems that use radiators, it is not possible to come to the air. The spring is warm and the air cannot be stopped. In winter, when the outdoor temperature is too high, the indoor temperature adjustment cannot be adjusted, the outdoor temperature is low, and the indoor heating temperature does not increase. Can not adjust the room temperature according to user, climate, comfort or not, that is, a waste of energy and not comfortable; that is, can not adjust the room temperature, can not measure households, of course, will not save energy. Warm floor heating, household metering, and automatic temperature control and energy saving are not easily achieved by the radiator.
7. The heat source needed for radiant heating on the ground of the water system is diversified. It can use centralized heating, small boilers, waste heat of power plants, natural gas and gas boilers, wall-mounted boilers and water source heat pumps, ground source heat pumps, solar energy, and geothermal spring water. In addition to centralized heating, the required piping is not long, the pipeline heat loss is small, and energy can be saved.
8. If the heat source uses centralized heating or a small boiler, the temperature of the water supply can be as low as 70°C. Compared with the overheating temperature of heating convection heating, it needs to be about 100°C, and the temperature is 20-30°C lower. This will naturally consume less coal and save energy.
9, floor heating has a 30-50mm thick filling layer, most of the use of C15 beans and stone concrete, heat capacity, good thermal stability, especially in the case of intermittent heating, room temperature changes slowly, even if the hot water valve is turned off or reduce the water temperature, The heat storage of the filling layer can keep the room temperature for about 6 hours. Going out during the day and returning in the afternoon, there is still room temperature. In contrast, convective radiator heating is not possible. Once the heating valve is turned off or stopped for 1-2 hours, it can't wait to get home from work and the room temperature will soon drop. Practice has proved that warm insulation, energy saving.
10, good warmth and heat comfort, no drying, no dust, no pollution to the indoor environment, but also due to energy-saving effects. This is unmatched by radiator heating. The low-temperature hot water surface radiant heating method is far-infrared radiation. Radiant temperature surface is low, the speed of water and politics is slow, and infrared radiation is transparent to the air, does not change the temperature of the air, better to overcome the indoor discomfort caused by convection heating, dry heat, dry mouth and other discomfort, significantly improve the skin The microcirculation makes the room temperature moderate. At the same time, radiative heat transfer does not cause the dust generated by the convection of air to drastically increase.
11. Due to the unique negative gradient temperature distribution of the ground heating along the height direction, the heat is concentrated in the human activity area, the top of the room will not be overheated, and the heat loss of the envelope structure will be small; in winter, the wall structure with good thermal insulation performance is used for heating in cold areas. With a thickness of about 450mm, a new type of insulating glass window with good heat insulation and sealing properties combined with the heat storage function of radiant heating on the ground will make the energy-saving effect more pronounced.
12. Energy conservation of building envelope structures has only created conditions for building energy conservation, and energy saving of ground radiant heating systems is the key to implementing energy conservation. Therefore, it can be affirmed that the development of ground radiant heating is the energy-saving direction of the heating system.
2, from the ground, heat from bottom to top, in line with the law of heat exchange. Under the same heat dissipation conditions, the same people living in the living space, the floor heating temperature is 2-3 °C higher than other heating methods.
3, radiation is different from conduction, convection heat transfer. Radiation is the transmission of thermal energy through the far-infrared radiation generated by thermal effects. Therefore, low-temperature hot water floor heating radiant heating can save 30-40% compared with other heating methods.
4. Sub-room temperature control of ground radiant heating requires a loop design. It is arranged separately according to the room. Each branch of the manifold is equipped with a flow control valve so that each room can reach the design required flow, thus avoiding the length of the tube. Consistent, resulting in consistent flow, and overheating and waste caused by design flow.
5. After the automatic chamber temperature control is adopted, the temperature control system can automatically close the loop and reduce heat waste. It is estimated that the energy saving will be about 10%.
6, to achieve room temperature control, are automatically completed by the thermostat. The setting and adjustment of temperature is very convenient. Unlike most central heating systems that use radiators, it is not possible to come to the air. The spring is warm and the air cannot be stopped. In winter, when the outdoor temperature is too high, the indoor temperature adjustment cannot be adjusted, the outdoor temperature is low, and the indoor heating temperature does not increase. Can not adjust the room temperature according to user, climate, comfort or not, that is, a waste of energy and not comfortable; that is, can not adjust the room temperature, can not measure households, of course, will not save energy. Warm floor heating, household metering, and automatic temperature control and energy saving are not easily achieved by the radiator.
7. The heat source needed for radiant heating on the ground of the water system is diversified. It can use centralized heating, small boilers, waste heat of power plants, natural gas and gas boilers, wall-mounted boilers and water source heat pumps, ground source heat pumps, solar energy, and geothermal spring water. In addition to centralized heating, the required piping is not long, the pipeline heat loss is small, and energy can be saved.
8. If the heat source uses centralized heating or a small boiler, the temperature of the water supply can be as low as 70°C. Compared with the overheating temperature of heating convection heating, it needs to be about 100°C, and the temperature is 20-30°C lower. This will naturally consume less coal and save energy.
9, floor heating has a 30-50mm thick filling layer, most of the use of C15 beans and stone concrete, heat capacity, good thermal stability, especially in the case of intermittent heating, room temperature changes slowly, even if the hot water valve is turned off or reduce the water temperature, The heat storage of the filling layer can keep the room temperature for about 6 hours. Going out during the day and returning in the afternoon, there is still room temperature. In contrast, convective radiator heating is not possible. Once the heating valve is turned off or stopped for 1-2 hours, it can't wait to get home from work and the room temperature will soon drop. Practice has proved that warm insulation, energy saving.
10, good warmth and heat comfort, no drying, no dust, no pollution to the indoor environment, but also due to energy-saving effects. This is unmatched by radiator heating. The low-temperature hot water surface radiant heating method is far-infrared radiation. Radiant temperature surface is low, the speed of water and politics is slow, and infrared radiation is transparent to the air, does not change the temperature of the air, better to overcome the indoor discomfort caused by convection heating, dry heat, dry mouth and other discomfort, significantly improve the skin The microcirculation makes the room temperature moderate. At the same time, radiative heat transfer does not cause the dust generated by the convection of air to drastically increase.
11. Due to the unique negative gradient temperature distribution of the ground heating along the height direction, the heat is concentrated in the human activity area, the top of the room will not be overheated, and the heat loss of the envelope structure will be small; in winter, the wall structure with good thermal insulation performance is used for heating in cold areas. With a thickness of about 450mm, a new type of insulating glass window with good heat insulation and sealing properties combined with the heat storage function of radiant heating on the ground will make the energy-saving effect more pronounced.
12. Energy conservation of building envelope structures has only created conditions for building energy conservation, and energy saving of ground radiant heating systems is the key to implementing energy conservation. Therefore, it can be affirmed that the development of ground radiant heating is the energy-saving direction of the heating system.
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