Which fin-tube air heating element has a good heat transfer effect?
Which fin-tube air heating element has a good heat transfer effect? I believe this is a problem that users and friends are more concerned about. Today, the editor will sort it out and share it with everyone.
In fact, when the finned tube air heating element heat exchanger is used in different industries, it is necessary to select the corresponding fin tube type and fin tube material according to the corresponding working condition information. What is the heat transfer efficiency? The heat transfer efficiency of finned tubes and finned tube types of different materials is also different, depending on the manufacturer's choice.
Let me share with you the heat transfer efficiency of different finned tubes. Finned tubes can be divided into high-finned tubes, medium-finned tubes and low-finned tubes according to the height of the fins. Among them, the most commonly used device for air heat exchange is a high fin tube.
1. The low-fin tube fin is directly extruded from the tube. The height of the fin is only 1-2mm. The common low fin tube in the shell and tube heat exchanger is 1.6mm. This finned tube is not used. Consider the thermal resistance in contact with the tube.
2. The fin height of the middle fin tube is about 3.2mm, which is often used in pressure vessel equipment such as shell and tube heat exchangers.
3. Air heat exchangers usually use high-finned tubes with a height range of 6.4-25 mm, depending on the working conditions.
Air heat exchangers with high finned tubes as heat exchange elements are widely used in various industrial applications. This type of heat exchange is usually used when the fluid on one side is at high pressure or the heat transfer coefficient is much greater than that of the fluid on the other side. equipment. For example, in a gas-liquid heat exchanger, the heat transfer coefficient on the liquid side is generally much higher than that on the gas side, and fins are generally added on the gas side to increase the heat transfer area.
Air heat exchangers with high fin tubes as heat exchange elements mostly use seamless steel pipes as base tubes. Fins are generally used outside the tube, usually water, oil, steam, and refrigerant flow through the tube, and there is air or smoke outside the tube. Air flows through the finned tube.