Water or air is usually used as coolant to remove heat. It can be divided into tubular cooler, plate cooler and air-cooled cooler. Cooler is a heat exchange device widely used in metallurgy, chemical industry, energy, transportation, light industry, food and other industrial sectors.

It is suitable for different working conditions such as cooler, condensation, heating, evaporation and waste heat recovery. Therefore, among many types of heat exchangers, coolers and tubular heat exchangers are still in an important position.

Cooler is a kind of heat exchange equipment, which is used to cool the fluid. Water or air is usually used as coolant to remove heat. There are wall coolers, spray coolers, jacket coolers and snake tube coolers. It is widely used in high-power silicon rectifier and large electrical equipment such as induction furnace and medium frequency furnace. It is a pure water, water air, oil-water and oil air cooling device as a cooling protection auxiliary machine.

The cooler takes the wall type, mixed type and regenerative heat exchanger as the main object. The working principle, heat transfer calculation, structure calculation, flow resistance calculation and design program of the cooler are illustrated and detailed examples in the book heat exchanger.