Low temperature processing of graphene

Low temperature processing of grapheneUsing air as a coolant, it can be used as a cooler or a condenser. Air coolers are mainly composed of tube bundles, brackets, and fans. The hot fluid in the air cooler flows inside the tube, while the air blows outside the tube bundle. Due to the large amount of ventilation required for heat exchange and low air pressure, axial flow fans are often used (see fluid conveying machinery). The type and material of the tube bundle have a significant impact on the performance of the air cooler. Due to the small heat transfer coefficient on the air side, fins are often added to the tube to increase the heat transfer area and fluid turbulence, reducing thermal resistance. Most air coolers use radial fins. Light tubes with an outer diameter of 25mm, low fin tubes with a fin height of 12.5mm, and high fin tubes with a fin height of 16mm are commonly used in air coolers. Fins are generally made of materials with high thermal conductivity and wrapped or embedded onto light tubes. To enhance the heat transfer efficiency of the air cooler, water can be sprayed into the inlet air for humidification. This not only lowers the air temperature but also increases the heat transfer coefficient. The use of air coolers can save a large amount of industrial water, reduce environmental pollution, and lower infrastructure costs. Especially in water scarce areas, replacing water cooling with air cooling can alleviate the contradiction of insufficient water sources

Low temperature processing of graphene

Mainly used in machine tool cutting processes, with the aim of improving product processing technology and increasing processing efficiency through low-temperature cold air