Performance comparison between copper tube and stainless steel heat exchange tube which is better

Stainless steel heat exchange tube: a device made of stainless steel. It is one of the components of the heat exchanger. It is placed in the cylinder and used for heat exchange between the two media.

The stainless steel heat exchange tube has the following advantages: 1. The heat exchange tube adopts 0.5-0.8mm thin-walled pipe, which improves the overall heat transfer performance. Under the same heat transfer area, the overall heat transfer coefficient is 2.121-8.408 higher than that of the copper tube %. 2. Since the material is made of SUS304 high-quality stainless alloy steel, it has high hardness, and the rigidity of the pipe is also significantly improved, so it has strong impact resistance and vibration resistance. 3. Due to the smooth inner wall of the tube, the thickness of the bottom layer of the boundary laminar flow is reduced, which not only enhances heat transfer, but also improves anti-fouling performance. In order to eliminate welding stress, heat treatment is carried out at a high temperature of 1050°C in a protective gas. All steel pipes are checked for leaks using differential pressure, and the air pressure test is to 10MPa, and there is no pressure drop within 5 minutes.

Advantages of copper tube: 1. Light weight, good thermal conductivity, high strength at low temperature. It is often used in the manufacture of heat exchange equipment (such as condensers, etc.). It is also used to assemble cryogenic pipelines in oxygen generating equipment. Copper tubes with small diameters are often used to transport pressurized liquids (such as lubrication systems, oil pressure systems, etc.) and pressure measuring tubes used as instruments. 2. Copper pipes are strong and corrosion-resistant, and have become the first choice for modern contractors to install tap water pipes, heating and cooling pipes in all residential commercial buildings. 3. The copper tube integrates many advantages: it is strong and has the high strength of ordinary metals; at the same time, it is easier to bend, twist, crack, and break than ordinary metals, and has certain frost heaving and impact resistance. Therefore, Once the copper water pipes in the water supply system in the building are installed, they are safe and reliable to use, and do not even need maintenance and maintenance. Disadvantages of copper pipes: As far as copper pipes are concerned, the high price is its biggest disadvantage. It is the most high-grade water pipe at present. It will not leak for life after it is usually installed by welding. The connection at the copper pipe interface mainly depends on the level of construction technology, which requires high construction quality.

The performance comparison between copper tubes and stainless steel heat exchange tubes is as follows: 1. The performance comparison of copper tubes and stainless steel heat exchange tubes: heat conduction Since the thermal conductivity of copper tubes is 100W/m°C, the thermal conductivity of stainless steel tubes is 13W/m°C. Of course it will affect the overall heat transfer coefficient. However, the wall thickness of the stainless steel pipe can be reduced by 0.5~0.8mm, while the wall thickness of the copper pipe cannot be less than 1.2mm due to the strength and erosion wear. According to the formula: Rc=(1) where: Rc——thermal conduction resistance, m2k/w. λ——thermal conductivity, W/(m.k). δ——pipe wall thickness, m When the pipe material is constant and λ is constant, according to formula (1), the smaller δ is, the smaller Rc is, and the greater the heat transfer coefficient is. This can narrow the gap between the overall heat transfer coefficient of stainless steel tubes and copper tubes. Since the inner and outer walls of copper pipes are rougher than stainless steel, they are prone to fouling.