A plate type heat exchanger is a type of exchanger that utilizes metal plates in order to transfer heat between two different kinds of fluids. This type of exchanger will often be used over a conventional type because there is more room for the fluids to spread out over the plates, which allows for more transference of heat over a shorter period of time, which shortens the heating process.
More Information on Plate Type Heat Exchangers
Virtually all of these look similar on the outside; the real differences between them occur on the inside in regards to the sealing technologies that are used and the plate design details. This type of exchanger is especially suited for transferring heat between low- and medium-pressure fluids. Where heat needs to be exchanged between two high-pressure fluids, a heat exchanger that is brazed, semi-welded, or welded will be used.
Plate type heat exchangers use two alternating thin chambers that are separated by a metal plate. The plate is usually made of stainless steel because it can withstand high temperatures, it is resistant to corrosion, and it is a strong metal.
How Do These Plate Type Heat Exchangers Transfer Heat?
The plates will often be spaced by rubber sealing gaskets that are usually pressed into the edge of the plates. The plates have right angles to the direction of the liquid’s flow formed into them, then are arranged to interlink with other plates that form a channel between them. There is usually a space ranging between 1.3 to 1.5 millimeters between the plates.
These plates are then pressed together, so that parallel flow channels are formed, having alternating cold and hot fluids. These plates have a large surface area, which enables the fastest transfers possible. The channel is thin to ensure that the liquid has maximum contact with the plate, ensuring the fastest flow. In addition, the flow of the liquid is turbulent to help maximize the transference of heat.