One, the concept of heat exchanger The heat exchanger is the hot portion of the fluid transfer heat to the cold fluid equipment, and heat exchanger. Its main function is to ensure that the process of medium required a specific temperature, but also improve energy utilization rate is one of the main equipment. The heat exchanger can be a separate device, such as a heater, cooler and condenser; but also a process of equipment components, such as ammonia synthetic tower's heat exchanger.