Convective heat transfer. The phenomenon of transferring heat from one place to another due to the relative displacement between different parts of a fluid is called thermal convection. During the process of thermal convection, heat transfer occurs through the migration and flow of fluids. Therefore, only liquids and gases can generate thermal convection. The heat exchange between the convective fluid and the solid wall is referred to as convective heat transfer. Samsung air conditioning repair explains: the meanings of conduction, convective heat transfer, and radiative heat transfer. Radiative heat transfer. Thermal radiation is a mode of heat transfer different from conduction and convection. Thermal radiation transfers energy via electromagnetic waves, where an object continuously emits radiant energy while also absorbing radiant energy from its surroundings. This energy transfer by radiation is called radiative heat transfer. Source: Beijing Samsung Air Conditioning Repair Center (http://blog.tianya.cn/blogger/blog_main.asp?BlogID=3908286). Heat conduction, also known as thermal conduction. Due to the thermal motion of molecules and atoms within a substance, heat is transferred from the high-temperature part to the low-temperature part. This process of energy transfer is called heat conduction. Its characteristic is that there is no macroscopic displacement between different parts of the material during the transfer process.