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Four Strokes Can Improve The Efficiency Of The Plate Heat Exchanger
Aug 03, 2018

Four strokes can increase the efficiency of the plate heat exchanger:

1. Improve the surface heat transfer coefficient of the sheet

Since the corrugation enables the fluid to generate turbulence at a small flow rate (Reynolds number -150), a higher surface heat transfer coefficient can be obtained, and the surface heat transfer coefficient is related to the geometry of the sheet corrugation and the flow state of the medium. Plate

Waveforms include herringbone, straight, spherical, and the like.

2, reduce the thermal resistance of the dirt layer

The key to reducing the thermal resistance of the fouling layer of the heat exchanger is to prevent scaling of the sheet. When the sheet scale is 1 mm thick, the heat transfer coefficient is reduced by about 10%. Therefore, it is necessary to pay attention to monitoring the water quality on both sides of the heat exchanger to prevent scaling of the plates and prevent water.

The medium debris adheres to the sheet.

3, select the plate with high thermal conductivity

The plate material can be selected from austenitic stainless steel, titanium alloy, copper alloy, and the like. Stainless steel has good thermal conductivity, thermal conductivity of about 14.4 W / (m · K), high strength, good stamping performance, not easy to be oxidized, and the price is lower than titanium alloy and copper alloy.

It is used in heating projects, but its resistance to chloride ion corrosion is poor.

4, reduce the thickness of the plate

The design thickness of the plate is independent of its corrosion resistance and is related to the pressure bearing capacity of the heat exchanger. The plate is thickened to improve the pressure bearing capacity of the heat exchanger. When the herringbone plate is combined, the adjacent plates are inverted with each other, and the corrugations are in contact with each other.

The fulcrum with large density and uniform distribution is formed, and the sheet angle 孑L and the edge sealing structure have been gradually improved, so that the plate heat exchanger has a good pressure bearing capacity.

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