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Which of the three ways of heat transfer is achieved by the cooling fan?

by:TOCH     2021-03-26

Automotive radiator fan factory is a cooling fan manufacturer integrating Ru0026D, production and sales. The company was established in 1999. We have worked hard in the cooling fan industry for more than a year and now have our own brand MFAN. The three methods of heat transfer will be explained below. I believe you will soon understand which heat conduction way the cooling fan achieves heat dissipation. As we all know, heat transfer is a natural phenomenon ubiquitous in nature. As long as there is a temperature difference between objects or between different parts of the same object, heat transfer will occur, and it will continue until the temperature is the same. The only condition for heat transfer to occur is that there is a temperature difference, which has nothing to do with the state of the object or whether the objects are in contact. The result of heat transfer is the disappearance of the temperature difference, that is, the objects or different parts of the objects that undergo heat transfer reach the same temperature. .Conduction: Heat conduction is the heat transfer phenomenon when there is no macroscopic movement in the medium (the medium is mainly divided into: gas, liquid, solid, or mixed). It can occur in solid, liquid and gas, but strictly speaking, only in Pure heat conduction is in the solid, and even if the fluid is in a static state, natural convection will occur due to the density difference caused by the temperature gradient. Therefore, convection and heat conduction in the fluid occur at the same time. (Summary: Heat conduction mainly occurs inside a solid, between two different solids, between solid and liquid, between solid and gas, and between liquid and gas. When the heat is transferred between them, we can't see macroscopic movement.) Convection: The fluid (fluid is the general name of liquid and gas) is used as the medium between objects, and the thermal expansion and contraction of the fluid and the flow characteristics of the fluid are used to transfer heat energy. Heat convection is a process in which the internal energy is transferred from the higher temperature part to the lower part by the flow of liquid or gas. Convection is the main method of liquid or gas heat transfer, and the convection of gas is more obvious than that of liquid. Convection can be divided into natural convection and forced convection. Natural convection often occurs naturally and is caused by uneven temperature. Forced convection is formed by stirring the fluid due to external influences. The cooling fan performs heat conduction through convection to achieve cooling and heat dissipation. .Radiation: The temperature balance can be achieved by radiating and absorbing each other's electromagnetic waves between objects without any medium. Thermal radiation is a process in which an object directly emits energy without relying on the medium and transfers it to other objects. Thermal radiation is the main way to transfer energy over long distances. For example, solar energy is transmitted to the earth through space in the form of thermal radiation. When the temperature of the object is low, it mainly radiates with invisible infrared light. When the temperature is higher than degrees Celsius, it emits visible light and even ultraviolet radiation in sequence. Solar water heaters, solar stoves, microwave ovens, etc. are all heat radiation. Heat transfer is achieved through three ways: heat conduction, convection and heat radiation. In the actual heat transfer process, these three methods are often not carried out separately.
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