All matter in the universe, the temperature only needs to be above the absolute 0° of -273.15°C, all the heat of electromagnetic wave nature will be transmitted to the outside world, and the wavelength is concentrated in the long-wave infrared band (the longer the wavelength of light, the smaller the corresponding energy carried). This kind of energy is called radiant energy, and radiation is transmitted without contact between objects; thermal radiation also has "equivalence": all matter, matter of all temperatures, will spread energy outward, no matter its temperature is high or low. Substances with low temperature will simultaneously transmit energy to the outside world. The energy released by radiation is related to the temperature of the material itself.

Therefore, in order to speed up the efficiency of heat conduction/radiation of material, it is necessary to increase the absolute energy/radiation amount of the material, and at the same time, it is necessary to reduce the "equivalence" of propagating heat radiation. And if the temperature of the substance itself does not change, the change in the energy it propagates is also the same; at this time, a layer of paint needs to be applied on the surface of the substance, and the paint releases energy in the short wave band and can carry more energy. The energy that spreads outwards is greater than the energy of the material itself, which reduces the "equivalence" of energy transmission, and accelerates the thermal radiation and cooling of the material.

The common car engine is basically an internal combustion engine, which is a reciprocating piston engine. The biggest difference between this type of engine and an external combustion engine is that its fuel is burned inside it. There are many types of internal combustion engines. Common gasoline engines and diesel engines are typical internal combustion engines.

The principle of the internal combustion engine determines that it is converted into kinetic energy by combustion, and at the same time, a large amount of excess heat is generated; the internal combustion engine performs work through the heat energy generated by the combustion. However, the effective power is only 30% to 40% of the total energy of the fuel, and the remaining energy is consumed as exhaust heat loss and mechanical friction heat loss. In particular, in order to maintain the proper temperature of the cylinder, cylinder head, and intake and exhaust valves, it is necessary to cool all parts of the internal combustion engine, so as to achieve stable working conditions and prolong service life.

The common engine is the water-cooled mode, and the main heat dissipation component is the radiator, which is often referred to as the water tank. The engine radiator works by using the heat energy lost by the cooling liquid. In order to ensure the proper temperature of the internal combustion engine, the heat energy lost by the cooling water is indispensable. Generally, the water pump driven by the engine is used to force the cooling water to circulate in all parts of the engine. The device that absorbs the heat generated by the engine and dissipates it into the air is the radiator.

Graphene thermally conductive coating is a new type of coating that accelerates the thermal conductivity of objects. It can transmit thermal energy in the form of a wavelength of 8 to 15 microns. (The far infrared rays with a wavelength of 8 to 15 microns in sunlight are essential for biological survival. Light waves of life).

After the graphene thermal conductive coating is painted and dried, a good thermal radiation film will be formed, with an emissivity of ≥95% (about 5-8 times that of common metal materials). At present, there are electric heaters coated with graphene thermal conductive coating, which realizes rapid heat conduction and energy saving and cost reduction.