Plate & Shell Heat Exchanger

Plate and shell heat exchangers (PSHE) combine the pressure and temperature capabilities of a cylindrical shell with the excellent heat transfer performance of a plate heat exchanger. The round plates ensure an even distribution of mechanical loads, without the stress concentrations that occur in the corners of rectangular plates.

PSHE Structure

Working Principle

The gaps between the corrugated plates are forming flow channels which are flowed through alternately by a primary and secondary media. Flow directors at shell side prevent a bypass – flow between shell and plate pack. The flow direction of both media can be arranged as counter-flow, co-current or cross-flow. The heat is transferred via the corrugated plates. When one or both media are evaporating or condensing partly or completely, it is called a two-phase application.

By means of deflections the media at plate side and shell side as well can be led in multi passes. This way the thermal length is increasing. Our plate & shell  heat exchangers are available in five sizes and with different corrugation patterns, i. e. with different corrugation angles and pressing depths.

H-plates allow high heat transfer rates caused by a high turbulent flow. L-plates are used in applications which are optimised for a minimal pressure loss. In gas / gas – applications or when the media is contaminated with solids G-plates often are used, which have larger channel cross-sections.

Features

  • Operating temperature: -200 to 500 °C

  • Operating pressure: -1 to 400 bar (g)

  • Liquid hold-up varies from 3 to 1,000 litres per pressure chamber.

  • Dynamic viscosity up to 8,000 mPa s

  • Flexible shell design

  • Plate thickness from 0.6 to 1.25 mm with H-, L- or G- plates.

  • Weld thickness up to 3.5x higher than plate thickness.

  • Plate design with self-cleaning effect

  • Wide range of plate materials provides high corrosion resistance.

  • Nozzle sizes: DN 20 (3/4“) to DN 1000 (40”)

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Configurations

Counter Flow

The most common form of flow configuration.

Cross Flow

For a reduced resistance on the primary and secondary side.

Co-current Flow

For maximum temperature differences at the inlet, or to avoid temperature crossing.

Inlet and outlet on both ends
For large volumetric flows on the plate side.

Plate side deflection
For large differences in volumetric flow rates between plate and shell side.

Shell and Plate side deflection
For optimising the pressure loss and heat transfer on both sides.

Plates with H-, L- and G- corrugation

H-plates allow high heat transfer rates caused by a high turbulent flow. L-plates are used in applications which are optimised for a minimal pressure loss, or hydraulically limited.

In gas / gas – applications or when the media is contaminated with solids G-plates are often used, which has a larger cross-sectional area.

Plate & Shell Heat Exchanger Range

Fully-welded HE, for liquid-liquid applications

Refrigerant evaporator, with steam dome

Partial evaporator, vertical, 100 bar

Kettle-type – evaporator

Vacuum evaporator

Air cooler, openable, with condensate separation

Gas cooler, cross-flow

Partial condenser, vacuum

Partial condenser, vacuum

Flooded evaporator with external droplet separation

Plate & Shell Heat Exchanger Range

Fully-welded HE, for liquid-liquid applications

Refrigerant evaporator, with steam dome

Partial evaporator, vertical, 100 bar

Kettle-type – evaporator

Vacuum evaporator

Air cooler, openable, with condensate separation

Gas cooler, cross-flow

Partial condenser, vacuum

Partial condenser, vacuum

Flooded evaporator with external droplet separation

Gallery

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