General Features / Plate Heat Exchangers Working Principle

Plate heat exchangers are such devices that work with the principle of two different liquids making heat transfer in themselves. The liquid to be heated or the liquid heats, are totally seperated from each other with plates. In standart plate heat exchangers, there are 4 in-out ports and two of them are for heater liquid and two of them for heated liquid. With special production, it is possible to produce heat exchangers which have more than one heater or heated liquids.

In MIT Plate Heat Exchangers, the flow is always diagonal. When the hot liquid enters in the top portion and leaves from the bottom, the cold liquid enters in the bottom and leaves from top. So efficiency reaches maximum level.

In MIT Plate Heat Exchangers, it is obvious in the above graphs that in the straight flow, cold leaving temperature can not exceed hot leaving temperature. On the other hand, it can be possible in the diagonal flow.