The stainless steel heat exchange tube is one of the elements in the heat exchanger. It is placed in the cylinder and plays an important role in the heat exchanger. It is used for heat exchange between the two media, so its heat exchange effect is very large during use. important point. Let’s talk about the factors that may affect the heat exchange effect of stainless steel heat exchange tubes, as follows:
1. Heat exchange tube material
The material of the heat exchange tube is divided into carbon steel, stainless steel, low alloy steel, copper, copper-nickel alloy, aluminum alloy and titanium; graphite, ceramics, polytetrafluoroethylene and other non-metallic materials. Because most of the conveying medium in the heat exchanger is hot water or corrosive liquid, if the copper heat exchange tube is used, its oxide layer may become thicker with time and use, and there will be more fouling inside, so the heat transfer effect will become poor. Difference. If stainless steel heat exchange tubes are used, oxidation will basically not occur, and even if oxidation occurs, the speed is relatively slow.
2. Surface smoothness
If you choose a threaded tube as the heat exchange tube, during the heat exchange process, the medium flowing in the threaded tube will rotate around its radius of curvature along the threaded tube, resulting in the tank being radial and circumferential, and the secondary reflux along the flow direction makes the tank The convective heat transfer coefficient is larger, so the heat transfer effect of the threaded pipe is better, and it is widely used in industrial production.
3. Inner wall thickness and shape
Corrugated tubes are more commonly used in stainless steel heat exchange tubes, and their unique ultra-thin wall thickness enables them to achieve enhanced heat transfer. The height difference between the peak and the trough can make the fluid strongly disturbed, even if the fluid velocity is low, it can make it in a turbulent state, and at the same time, the temperature gradient of the thin tube wall is small, which greatly reduces the thermal resistance of the tube wall and improves the heat transfer inside and outside the tube coefficient to increase the heat transfer coefficient.