What is Heat Ex-changer?
Heat Ex-changer works on the principle of Fluid Dynamics. Heat Ex-changer is a device which is used to exchange the heat from one medium of fluid to other medium of fluid. It is widely used in heavy machinery like Hot Water Generator, Air Conditioner, Adiabatic Coolers, Piston Pumps, Roll Oil Coolers, and Coil Condensers etc.
In this figure, there is coil in the medium and water is flowing through medium. In the coil, the hot water steam is moving, so there will be heat transfer from pipe to water, the water which is coming out, it would be hot and steam which is coming out, it would be cold.
Types of Heat Ex-changer:
1.Shell & Tube Heat Ex-changer
Shell & Tube Heat is most common heat ex-changer which is used in the industry. It consist of bunch of tubes supported by baffles. Baffles are important part to support the tubes while assembling. Bunch of tubes assembled inside the shell.
In given above figure, there is bunch of coil inside the shell. In tube, hot water is running and in shell there is cold water. It is counter flow heat exchanger cause the flow of both fluids in different direction. When hot water in tube is moving through cold water phases, it heat energy is transferred to the fluid or vice versa. Whatever the water is coming out, it would be hot.
2.Plate Type Heat Ex-changer
It consists of corrugated and thin metal plates, with small space between them. The metal plates having grooves. It has larger surface area, to travel heat .All plates are connected to rubber gaskets. The principle of this type of heat exchanger is thermal exchange in the properties of fluid.