Basic principles of gas infrared radiation heating system

There are three ways of heat transfer: conduction, convection, and radiation. The sun is 150 million kilometers away from the Earth, yet it can transfer its heat energy to the Earth's surface through the use of infrared radiation.

The phenomenon in which an object converts its own thermal energy and emits radiant energy through infrared radiation is called thermal radiation or infrared radiation. The higher the surface temperature of an object, the stronger its infrared radiation ability. Gas infrared radiation heating is the use of infrared radiation that is burned in a radiation heater and emits a certain wavelength (between 2.8-6.2 microns, with an absorption rate greater than 90%) for heating. After infrared radiation is irradiated onto an object, some is absorbed and some is reflected, providing secondary heating to the object and human body.

For high-rise buildings such as factories and warehouses, using gas infrared radiation heating can avoid vertical temperature field imbalance caused by convective heating. At the same time, local heating or intermittent heating can be provided to the areas inside the factory according to production process requirements, which cannot be achieved by flow heating. Compared with traditional convection heating methods, gas infrared radiation heating can save operating costs by 30% -60%, and the energy-saving effect is very significant

It is a clean primary energy source, and the combustion products do not pollute the atmosphere.

Scope of Application

Theoretical and practical evidence:The use of gas infrared radiation heating in high-rise buildings saves at least 30% more energy than traditional convection heating methods.

Widely used in:Industrial plants, hangars, logistics warehouses, shopping malls and supermarkets, sports venues, chicken farms, greenhouses, indoor botanical gardens, canteens, classrooms, cinemas, churches and other places of Class D and Class E

12 characteristics of tubular gas radiation heating equipment

1. Negative pressure combustion system: ① No leakage of combustion products; ② Full combustion, good exhaust emissions, and high technological content; ③ Good energy-saving and environmental protection effects, safe and reliable system; ④ Represents the development direction of gas radiant heaters.

2. Uniform and straight flame shape, stable combustion: ① Uniform and straight columnar flame, up to 5 meters long; ② Maintain a uniform temperature gradient on the surface of the radiation tube, without the occurrence of non-uniform high temperature points; ③ There will be no occurrence of sparking or tempering. The thermal efficiency is over 95%, which improves radiation efficiency and comfort, and has good environmental and energy-saving advantages; ⑤ The exhaust gas can be directly discharged indoors; ⑥ The system is simple and reduces initial investment.

3. The host box adopts an overall structural design, which is compact in structure: ① It can save installation space; ② Enhance the stability of equipment operation; ③ Reduce noise; ④ Extend the service life; ⑤ Convenient for disassembling the burner and negative pressure fan, and easy for component replacement.

4. Using composite solenoid valve: ① Cut off gas to ensure safety; ② Reduce fuel pressure and adapt to multiple gas sources; ③ Stepless buffering opening method protects the burner and ensures normal ignition of the high-pressure ionization igniter.

5. There is a negative pressure detection probe at the air inlet on the burner side, which is connected to the negative pressure transmitter to ensure that the equipment always maintains a normal negative pressure state and sufficient combustion air during operation.

6. The material for the high and low temperature radiation tube is made of special high-temperature resistant stainless steel or aluminum infiltrated steel: ① It can withstand high temperatures of up to 1200 ℃ or above, and during normal operation, the surface temperature of the high-temperature radiation tube is generally around 550 ℃; ② No specialized combustion chamber is required, the structure is compact, the heat transfer performance is good, and the combustion efficiency is higher than other similar products.

7. The manufacturing of negative pressure fans follows CE standards, and the set negative pressure value at the air inlet of the burner is approximately the approved value, ensuring sufficient air for combustion. The impeller components of the negative pressure fan are made of high-temperature resistant materials to ensure that the negative pressure fan can operate safely under high temperatures for a long time. The manufacturing of the negative pressure fan motor follows the IEC 60034-1 manufacturing standard, is maintenance free, and is equipped with an air-cooled fan on the motor. In order to ensure sufficient and stable combustion, the negative pressure fan motor is specially equipped with a voltage regulator to ensure stable operation of the fan, and the fan speed does not fluctuate with the frequency of the power grid.

8. The material of the reflector is made of mirror stainless steel, and its infrared reflectivity is close to 100, which is about 5-8% higher than the infrared reflectivity of other similar products.

9. The equipment comes with five layers of safety protection devices, ensuring the safety and reliability of the system operation.

Dual solenoid valve intake control;

U Central processing unit ignition program control;

U-ion flame monitoring and control;

U flameout protection device;

U overvoltage and undervoltage automatic control protection device;

10. The overall structural design adopts a unique flexible structure: ① The connection between each component fully considers the thermal expansion of the equipment. Both the radiation tube and the reflector have a certain degree of expansion gap. If there is no expansion gap, after a period of use, thermal stress will be generated inside the tube and reflector, causing deformation and damage, greatly reducing the reliability of the product. ② The pipes are connected by sleeves, with expansion gaps reserved to completely eliminate thermal stress and ensure the safety and reliability of the equipment for long-term operation.

11. Flexible arrangement and convenient control of individual equipment: ① A heating area is composed of multiple devices, with flexible arrangement; ② Different heating areas can set different temperatures; ③ Can be controlled regionally and individually; ④ It can provide both heating and local heating; ⑤ The pressure drop inside the radiation tube is very small, and there is no noise inside the tube; ⑥ One burner is equipped with a negative pressure fan, which does not require a damper regulating valve. The air volume is constant during operation, complete combustion, and exhaust gas can be discharged internally, resulting in significant energy-saving effects.

12. Reasonable surface temperature and high radiation efficiency: ① The surface temperature of the radiation tube is 180-550 ℃; ② The radiation heat intensity is moderate, with over 90% being absorbed and converted into thermal energy.