1. Comparison between copper tubes and steel tubes
Before answering why heat exchangers use copper tubes instead of steel tubes, we need to understand the comparison between copper tubes and steel tubes.
Copper tubes not only have good thermal conductivity, but also have very good toughness and plasticity. Therefore, copper tubes can be used to manufacture various irregular shapes and large bending tubes, which are not easy to crack and deform. In addition, copper tubes have good corrosion resistance and antibacterial properties, and will not rust or corrode even after running for a period of time. Copper tubes are also an excellent conductive material with excellent shielding function for electromagnetic waves. Due to the above advantages, copper tubes have become one of the preferred materials for manufacturing heat exchangers, air conditioners, condensers and other devices.
Steel tubes have better strength and rigidity and can withstand greater pressure and load. However, the thermal conductivity and plasticity of steel tubes are poor, and they are not suitable for occasions with large bending and smooth inner surface.
2. Why do heat exchangers use copper tubes instead of steel tubes?
1. Good thermal conductivity
The heat exchanger needs to transfer heat, so the thermal conductivity of the material is very important. Copper tubes have better thermal conductivity than steel tubes, which can quickly transfer heat and improve the efficiency of the heat exchanger.
2. Good toughness and plasticity
The pipes in the heat exchanger need to have certain bends and twists. Copper tubes are easier to process into curved or tortuous shapes than steel tubes, and are not easy to deform and break.
3. Good corrosion resistance and antibacterial properties
The stability and service life of the heat exchanger performance are also related to whether the internal materials are prone to rust, corrosion, or dirt during use. Copper tubes have excellent corrosion resistance and antibacterial properties, which can ensure that the interior of the heat exchanger is not easy to produce dirt and bacteria, thereby increasing the service life of the entire system.
4. Low energy consumption
To complete heat transfer with the help of physical principles such as condensation and evaporation, it is necessary to overcome the resistance of the fluid pipeline in the heat exchanger. The smaller the resistance, the lower the energy consumption. The inner surface of the copper tube is smooth and the inner diameter is small, which can effectively reduce the friction of the fluid in the tube and reduce the energy consumption of the system.
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