Plate Type Heat Exchanger Design

The most common design is to have the plates pressed against each other with gaskets in between.

Plate type heat exchanger design. Plate heat exchangers are constructed with a series of plates held together in a large frame. Laval plate heat exchanger. Heat transfer coefficient and design margin. A plate exchanger consists of a series of parallel plates that are placed one above the other so as to allow the formation of a series of channels for fluids to flow between them.

α 1 the heat transfer coefficient between the warm medium and the heat transfer surface btu ft 2 h f α 2 the heat transfer coefficient between the heat transfer surface and the cold medium btu ft 2 h f δ the thickness of. Starting point of this design is to define given properties. Plate heat exchangers were first produced in the 1920s and have since been widely used in a great number of sectors. There are four main types of phe.

There are two inputs and two outputs and the spaces between plates alternate between the two liquids hot cold hot cold etc. Gasketed brazed welded and semi welded. Each pair of plates creates a channel through which one fluid can flow and the pairs are stacked and attached via bolting brazing or welding such that a second passage is created between pairs through which the other fluid can flow. As shown above right.

This has made them the preferred choice for a variety of heat transfer duties in many industries. Such a design allows to open and clean very easily the exchanger which will be appreciable in situations where high fouling is expected or if. The plate heat exchanger phe is a specialized design well suited to transferring heat between medium and low pressure fluids. Welded semi welded and brazed heat exchangers are used for heat exchange between high pressure fluids or where a more compact product is required.

Plate type heat exchanger uses metal plates to transfer heat between two fluids. B hot fluid film resistance. The overall heat transfer coefficient ohtc is very impotent factor in the design of plate type heat exchange design ohtc units kcal hr m 2 c or kw m 2 c it is mainly depends upon the following parameters. A cold fluid film resistance.

Also referred to as plate type heat exchangers plate heat exchangers are constructed of several thin corrugated plates bundled together. The total overall heat transfer coefficient k is defined as.