Where is the double-tube heat exchanger mainly used?

Heat exchangers are widely used, such as radiating fins used for heating in daily life, condensers in steam turbine devices, oil coolers on space rockets, etc. It is also widely used in chemical, petroleum, electric power and atomic energy industries. Its main function is to ensure the specific temperature of the medium needed for the process, and it is also one of the main equipment to improve the energy utilization rate. The heat exchanger can be an independent device, such as heater, cooler and condenser. It can also be a part of a certain process equipment, such as a heat exchanger in an ammonia synthesis tower. Due to the limitation of manufacturing technology and scientific level, the early heat exchanger can only adopt simple structure, with small heat transfer area and large volume, such as snake tube heat exchanger. With the development of manufacturing technology, shell-and-tube heat exchanger is gradually formed. It not only has a large heat transfer area per unit volume, but also has a good heat transfer effect. It has long been a typical heat exchanger in industrial production.