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How to improve the work efficiency of welded plate heat exchanger

How to improve the work efficiency of welded plate heat exchanger

(Summary description)To improve the heat transfer coefficient of a welded plate heat exchanger, only by simultaneously increasing the surface heat transfer coefficient of the hot and cold sides of the plate, reducing the thermal resistance of the dirt layer, choosing a plate with high thermal conductivity and reducing the thickness of the plate, can the welded be effectively improved. The heat transfer coefficient of a plate heat exchanger.

How to improve the work efficiency of welded plate heat exchanger

(Summary description)To improve the heat transfer coefficient of a welded plate heat exchanger, only by simultaneously increasing the surface heat transfer coefficient of the hot and cold sides of the plate, reducing the thermal resistance of the dirt layer, choosing a plate with high thermal conductivity and reducing the thickness of the plate, can the welded be effectively improved. The heat transfer coefficient of a plate heat exchanger.

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To improve the heat transfer coefficient of a welded plate heat exchanger, only by simultaneously increasing the surface heat transfer coefficient of the hot and cold sides of the plate, reducing the thermal resistance of the dirt layer, choosing a plate with high thermal conductivity and reducing the thickness of the plate, can the welded be effectively improved. The heat transfer coefficient of a plate heat exchanger.

welded plate heat exchanger
  
1. Since the ripples of the welded plate heat exchanger can cause the fluid to generate turbulence at a small flow rate, it can obtain a higher surface heat transfer coefficient. The surface heat transfer coefficient is related to the geometric structure of the plate ripples and the flow state of the medium. The waveform of the plate includes herringbone, straight, spherical and so on. After years of research and experimentation, it has been found that the herringbone plate with triangular corrugated cross-section has a higher surface heat transfer coefficient, and the greater the angle of the corrugation, the higher the flow velocity of the medium in the flow channel between the plates, and the greater the surface heat transfer coefficient .
 
2. The key to reducing the thermal resistance of the fouling layer of a welded plate heat exchanger is to prevent the plate from fouling. When the plate fouling thickness is 1mm, the heat transfer coefficient is reduced by about 10%. Therefore, care must be taken to monitor the water quality on both sides of the heat exchanger to prevent fouling of the plates and prevent debris in the water from adhering to the plates. In order to prevent water theft and corrosion of steel parts, some heating units add chemicals to the heating medium. Therefore, attention must be paid to water quality and adhesives that cause debris to contaminate the heat exchanger plates. If there are viscous debris in the water, special filters should be used for treatment. When choosing medicaments, it is advisable to choose non-sticky medicaments.

3. Welded plate heat exchanger plate material can choose stainless steel, titanium alloy, copper alloy, etc. Stainless steel has good thermal conductivity, with a thermal conductivity of about 14.4 W/(m•K), high strength, good stamping performance, and is not easy to be oxidized. The price is lower than that of titanium alloy and copper alloy. It is used most in heating engineering, but its Poor resistance to chloride ion corrosion.
 

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Time of issue:2020-02-11 00:00:00

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