Analysis of cooling tower noise control by cooling tower manufacturers

Cooling towers are generally arranged in residential areas and around the office. Continuous noise output will affect the quality of life and physical and mental health of users, which makes the noise control of cooling towers increasingly valued by people. In this paper, cooling tower manufacturers analyze cooling tower noise control.

1. Analysis of noise source of cooling tower

Cooling tower is a kind of heat exchange equipment, its noise source mainly has three aspects:

1. Cooling tower fan noise

It is mainly divided into the mechanical noise of the cooling fan and the aerodynamic noise of the fan inlet and exhaust, and the characteristic is low frequency. The fan installed in the upper part of the cooling tower is mainly drawn out in reverse to achieve the purpose of cooling. The high-speed rotation of the fan will generate aerodynamic noise. Multiple blades in the rotation act on the air flow, and then cause the air pressure and movement speed to fluctuate. The imbalance of the rotating parts will cause the structure to vibrate, resulting in vibration noise. .

2. The noise of falling water in cooling tower

The circulating water of the cooling tower flows down from the upper spray pipe and will generate impact noise through the free fall, which is proportional to the square of the falling speed and inversely proportional to the fourth power of the impact water surface.

3. Cooling tower body noise

The noise of cooling tower machinery mainly comes from the vibration of machine parts. The parts of the machine will elastically deform during the work, and then generate vibration. When mechanical components with elasticity propagate vibration energy to the radiating surface, they will propagate through the air and form mechanical noise.

The cooling tower noise comprehensive control plan is mainly: the installation of a silencer at the outlet of the fan can effectively prevent aerodynamic noise; the installation of sound absorption and insulation barriers around the cooling tower to effectively reduce the water spray noise and mechanical noise; , It can ensure that the cooling tower can effectively control the noise propagation while normal ventilation and heat dissipation.

The above cooling tower manufacturers analyze the cooling tower noise control. In order to avoid affecting the surrounding residents' living environment, the related cooling tower manufacturers should do a good job of noise control.