Basic Heat Transfer Mode of the Plate Heat Exchanger
According to the different heat transfer mechanism, there are three basic ways of heat transfer: heat conduction, convection and radiation.
Heat conduction: heat conduction is also called heat conduction. It refers to the process of heat transfer from the high-temperature part of an object to the low-temperature part of the same object, or from a high-temperature object to a low-temperature object in direct contact with it.
Convective heat transfer: convective heat transfer refers to the transfer of heat from one place to another depending on the macro displacement of the fluid. Convective heat transfer in chemical production usually refers to the heat transfer when the fluid is in direct contact with the solid wall. Convective heat transfer mostly refers to the heat transfer between the fluid and the solid wall. Its heat transfer rate is closely related to the fluid properties and the state of the boundary layer.
Radiative heat transfer: also known as thermal radiation, refers to the transmission of electromagnetic waves in space due to thermal reasons. An object changes heat energy into radiant energy, which spreads in the air in the form of electromagnetic waves. When it encounters another object, it is absorbed in whole or in part and becomes heat energy.