How Plate–and–Shell Heat Exchangers Work

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Since one of the fluids enters and leaves the exchanger through the shell openings, each plate only needs two openings instead of four required in a rectangular plate. This medium flows in so-called plate channels, which are formed by welds around the perimeters of the plate pairs. The corresponding channels carrying the other fluid, known as shell channels, are created by welding together the edges of the plate holes.

Plate–and– Shell: A Versatile Heat Exchanger Design

The plate-and-shell design is as versatile as it is strong and thermally efficient. Just like a shell-and-tube exchanger, the cylindrical shell can be equipped with nozzles for filling, draining, venting, pressure measurement and so on. When the exchanger is used as an evaporator, the plate package can be positioned eccentrically in a large shell to reduce pressure drop. Classic kettle-type evaporators can thus be equipped with a plate pack instead of a tube bundle.

Evaporators and Superheaters

Direct through-flow evaporators can be built in addition to flooded types. The superheating which is important for ORC processes can take place in a second heat exchanger which may be fitted directly onto the evaporator. As well as evaporators and superheaters, Gesmex manufactures heat exchangers for heat recovery within ORC circuits.

Simpler plate heat exchangers are mainly designed for a specific purpose such as heating, cooling, evaporation or condensation. But what advantages do plate heat exchangers offer? Learn more in Multifunctional Plate Heat Exchangers

90 percent of the heat of the vapour leaving the turbine, for instance, can be transferred to the evaporator feed by using plate exchangers instead of tube bundles. By cooling the vapor close to its dewpoint, the cooling capacity required for the process as well as the amount of heat rejected to the environment can be significantly reduced.

Learn, how Heat Exchangers Cope with Acid Condesate on page 3...

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