Views: 1 Author: Site Editor Publish Time: 2025-06-18 Origin: Site
Structure: It is mainly composed of finned tube and coil. Finned tube is to add fins on the outer surface of the common tube to increase the heat transfer area. The shape, thickness, height and spacing of the fins can be designed according to different needs, and the materials are usually aluminum, copper, steel or stainless steel. Coil is the finned tube according to a certain way of bending, arranged into a disk, in order to achieve a specific heat transfer process and layout requirements.
Working principle: Based on the principle of heat exchange and enhanced heat transfer. High-temperature fluid (such as hot flue gas, hot water, steam, etc.) flows inside the finned tube, and the heat is transferred to the fins through the tube wall. As the fins increase the heat transfer area, the heat can be transferred to the air outside the tube more effectively. At the same time, the air flows through the outside of the finned tube under the action of the fan and other equipment, and the temperature rises after absorbing the heat, thus realizing the heating or heat recovery process of the air. In this process, heat is transferred sequentially by convection, thermal conductivity, etc.
Characteristics
Advantages: high heat transfer efficiency, the presence of fins greatly increases the heat transfer area, improves the speed and effect of heat transfer, can effectively recover heat and improve the efficiency of energy use; compact structure, in the limited space can achieve a larger heat transfer, saving installation space; applicability, according to different working conditions and needs, choose the appropriate tubes, fins material, fins form and coiled tube structure, to adapt to the Good corrosion resistance, the selection of appropriate materials and surface treatment process, stable operation in corrosive environments, prolonging the service life.
Disadvantages: the manufacturing process of finned tube is relatively complicated and the cost is high; in the process of operation, if too much dirt accumulates on the air side or fluid side, it will affect the heat transfer effect, and regular cleaning and maintenance are required; for some high temperature, high pressure, or highly corrosive special conditions, special materials and designs are required, which further increase the cost and technical difficulties.
Applications
Heating, ventilation and air conditioning (HVAC) system: used in air conditioning units, fresh air units, air treatment units and other equipment to achieve the heating, cooling, dehumidification and other functions of the air, and at the same time can be recycled in the air-conditioning system of the residual heat, reducing energy consumption.
Industrial process: in petroleum, chemical, electric power, metallurgy and other industrial fields, commonly used in various processes of heat recovery and transfer, such as the air preheater of the boiler, waste heat recovery of industrial furnaces and kilns, chemical reactor cooling or heating, etc., to improve the energy utilization rate of industrial production and reduce production costs.
Food processing industry: It can be used for air heating and heat recovery in the process of food drying, sterilization, cooling, etc., to meet the temperature and humidity requirements of the food processing process and save energy at the same time.
Other fields: It can also be applied in new energy fields such as solar water heater, ground source heat pump, air energy heat pump, etc., as well as cooling of data centers and energy-saving renovation of buildings, etc., so as to realize effective utilization of heat and energy saving and emission reduction.
