1. Causes of heat exchanger itself

　　Many users only provide heat exchange area when purchasing heat exchanger, without specific data such as heat exchange, medium flow, inlet outlet temperature, etc. as a result, although the type area of the purchased heat exchanger is right, the process combination is unreasonable, the equipment fails to achieve the expected results, even on this basis, it is useless.

　　2. System configuration reason

　　The heat exchanger plays the role of heat conversion follows the law of energy conductivity, that is, the heat released the hot side is equal to the heat absorbed by the cold side. In most cases, the heat the heating system on the hot side is taken away by enough cooling water on the cold side, such as insufficient water volume water temperature, which leads to the failure of the temperature at the hot side. If this is the reason, the heat exchanger is useless.