Tips to improve the efficiency of plate heat exchangers
Release time:
2020-06-06 11:12
Source:
When using plate heat exchangers, how can we improve their efficiency? Let's introduce four tips to improve their efficiency. 1. Improve the surface heat transfer coefficient of the plates. Because corrugation can produce turbulence in the fluid at a lower flow rate (when the Reynolds number is approximately 150), a higher surface heat transfer coefficient can be obtained. The surface heat transfer coefficient is related to the geometric structure of the plate corrugation and the flow state of the medium. Plate shapes include herringbone, straight, and spherical. 2. Select plates with high thermal conductivity. Plate materials can be selected from austenitic stainless steel, titanium alloys, copper alloys, etc. Stainless steel has good thermal conductivity, about 14.4 W/(m·K), high strength, good stamping performance, is not easily oxidized, and is cheaper than titanium alloys and copper alloys. It is widely used in heating engineering, but its resistance to chloride ion corrosion is poor. 3. Reduce the plate thickness. The design thickness of the plate is unrelated to its corrosion resistance, but is related to the pressure-bearing capacity of the heat exchanger. Thicker plates can improve the pressure-bearing capacity of the heat exchanger. When using herringbone plates, adjacent plates are inverted, and the corrugations are in contact with each other. 4. Reduce the thermal resistance of the fouling layer. The key to reducing the thermal resistance of the fouling layer in the heat exchanger is to prevent plate fouling. When the plate fouling thickness is 1 mm, the heat transfer coefficient is reduced by about 10%. Therefore, it is necessary to monitor the water quality on both the hot and cold sides of the heat exchanger to prevent plate fouling and prevent foreign matter in the water from adhering to the plates. The above is an introduction from our plate heat exchanger manufacturer's customer service on how to improve the efficiency of plate heat exchangers. We hope our introduction can help you. If you want to learn more, you can call our hotline, and we will provide you with more professional services.
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