Coaxial heat exchangers are the best example of a "tube-in-tube" structure. It is also commonly called a spiral heat exchanger. This device is often used as an evaporator or condenser in heat pumps, chillers, air conditioners, and various HVAC systems.
Depending on the working environment, the inner tube can be made of copper, titanium or cupro-nickel alloy. Meanwhile, the outer tube is generally composed of steel/copper. The surface of the inner tube has multiple spiral grooves for specific purposes. These grooves increase surface area, which improves heat transfer.
Coaxial heat exchanger shows counter-current heat transfer mechanism. Water and refrigerant have different freezing and boiling points; therefore, heat will flow from one place to the other. By deploying this efficient heat exchange model, you can also achieve superheating and subcooling of refrigerant vapor and liquid refrigerant respectively.
advantage
1. High efficiency: Because it is a pure counterflow heat exchanger, it has an efficient heat transfer mechanism. This is all thanks to additional grooves on the surface of the inner tube, which are textured to improve heat transfer on the refrigerant side.
2. Corrosion Resistant: These heat exchangers are actually built to last. Due to fewer solder joints, the structure is strong and reliable. Additionally, they are made of non-corrosive materials, making them suitable for harsh working conditions.
3. Ergonomic design: The modular design is clear and the structure is simple and effective. This special tube-in-tube heat exchanger can be customized and manufactured in different shapes and sizes according to different business needs. that's right! Coaxial heat exchangers are available in square, round, double round or mosquito coil shapes to suit different equipment and uses.
Application areas
Coaxial heat exchangers are widely used in chillers with heat pumps for the supply of hot water.
Multi-stage refrigeration systems also mainly use this heat exchange structure.
For use in climate chambers and temperature control units.
For cooling and heating operations in marine applications.