Measures to increase heat exchange rate of finned tube heat exchanger
Date：2020-09-06 Views：11263
Finned tube is to improve the heat exchange efficiency. Usually, fins are added on the surface of the heat exchange tube to increase the external surface area (or internal surface area) of the heat exchange tube, so as to achieve the purpose of improving the heat exchange efficiency. As a heat exchange element, finned tube has been working in high temperature flue gas for a long time. For example, the finned tube for boiler heat exchanger is used in harsh environment, high temperature, high pressure and corrosive atmosphere. Experts of Zhisheng Weihua thermal conductivity and anti-corrosion coating point out that this requires the finned tube to have high performance index. 1) Anti corrosion 2, anti wear 3, low contact resistance 4, high stability 5, and anti fouling ability.
The principle of finned tube radiator is to cool air with refrigerant, heat air with heat medium, or recover waste heat of air with cold water. High temperature water, steam or high temperature heat transfer oil can heat air, and brine or low temperature water can cool air. The heat exchange rate of the cured coating is more than 10% higher than that of the base material of zs-722 acid resistant thermal conductive and anticorrosive coating, and the conductivity is more than 10-12s / m, It is equivalent to 1012 Ω m volume resistivity coating with semiconductor to conductor properties. Corrosion resistance: resistant to strong acid, alkali and organic solvent at 600 ℃, except oxidizing acid. Zhisheng zs-722 acid resistant thermal conductive anticorrosive coating has been applied in many industrial fields, such as electronics, electrical appliances, aviation, chemical industry, printing, military and civil.
The thermal conductive anti-corrosion coating can separate the heat dissipating metal from the external corrosive substances, and play the role of protecting materials on the basis of heat dissipation accelerating heat conduction. Heavy duty anti-corrosion coating refers to a kind of anticorrosive coating which can be applied in relatively harsh corrosion and heat dissipation environment and has a longer protection period than conventional anti-corrosion coatings.
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