Views: 16 Author: Site Editor Publish Time: 2023-05-17 Origin: Site
The finned tube heat exchanger is an industrial heat exchange equipment for hot water or steam, which expands the heat exchange area by adding fins to the glossy base tube. Its structure is a joint unit consisting of a porous plate frame and a steel heat sink row tube, which is suitable for air heating, cooling, and waste heat recovery in large and medium-sized heat exchange systems.
Introduction of finned tube heat exchanger
The working principle of finned tube heat exchanger
Fin tube heat exchanger applications
The finned tube heat exchanger medium is mainly divided into two kinds of gas and liquid, the gas has steam or high-temperature exhaust gas, etc.; liquid has hot water or heat transfer oil. In actual use, steam and hot water are generally used. Steam needs to maximize the use of heat in a short period of time due to rapid heat loss, so the heat exchanger is equipped with baffles at both ends, and the heat dissipation tubes are interoperable, which is conducive to improving thermal efficiency; hot water, on the contrary, is set up with multi-loop tubes, using a forked row arrangement, and a separate elbow tube connection, in order to increase the residence time of hot water and improve heat transfer efficiency.
When hot water or steam passes through the finned tube heat exchanger base tube, the heat is transferred to the inner wall of the base tube through convection, and the inner wall transfers the heat to the outer wall and fins through heat conduction, and the outer wall and fins finally heat the surrounding air by forced convection and radiation to achieve the heating purpose.
The finned tube heat exchanger is usually used for heating and cooling air and is suitable for applications where the convective heat transfer coefficients of the fluids on both sides differ significantly, such as heating air with saturated steam or cooling materials with air, and is therefore used in modern process industries for heating air to dry materials in various types of drying equipment. When the air flows outside the tube, the convection heat transfer coefficient is very small. When the tube is equipped with fins, it enhances the turbulence of the air outside the tube and increases the exterior area of the heat exchanger tube, thus greatly improving the heat transfer effect.
The finned tube heat exchanger for heating air is mainly used in baking rooms, baking tunnels, dryers, and other equipment to raise the temperature of the air to accommodate more moisture and achieve the purpose of transferring moisture from the material to the air. Another category for cooling air, applications are also common in the process industry, mainly used in hydraulic systems for oil cooling and cooling, in petroleum refining and other industries to play a tower top oil and gas condensation, and can be used for gasoline, diesel, heavy oil and residual oil and other different cooling conditions, this type of finned tube heat exchanger is the ambient air as a cooling source cooling tube medium, only in the case of air conditioning systems for air temperature control, cooling The source is cooling water or chilled water.
The above is some of the basics about finned tube heat exchangers. With the popularity of heat exchangers, we have more and more opportunities to see heat exchangers in our lives. It is also very important to have some knowledge about heat exchangers.
