Silent water cooling tower, destination Joanópolis/SP
Silent water cooling tower, Alpina model INS/20, destined for Joanópolis/SP.
A silent water cooling tower is designed to operate with minimal noise levels, making it ideal for sensitive locations such as urban areas, hospitals, hotels, shopping malls, condominiums, data centers, and industries near residences.
Below is a practical and technical summary of what characterizes this type of tower and how to achieve low noise in practice:
What makes a cooling tower silent?
1. Low-Noise Fan
Special axial fans (aerodynamic profile)
Lower rotation speed (reduced RPM)
Larger diameter → same airflow with less noise
Material: FRP or balanced aluminum
Typical reduction: 5 to 10 dB(A) in the fan only
2. Variable Frequency Drive (VFD) Motor
Allows operation at lower rotation speed when the thermal load is reduced
Avoids noise peaks at startup
Saves energy
3. Acoustic attenuators (silencers)
Installed:
At the air inlet
At the fan outlet
Manufactured in aluminum or FRP with sound-absorbing material
Additional reduction: 8 to 15 dB(A)
4. Optimized Fill (low hydraulic noise)
Low pressure drop film-type fill (PP or PVC)
Less water turbulence
Uniform distribution Low-pressure spray nozzles
5. Anti-vibration structure
Base with rubber cushions
Vibration isolators on the motor
Dynamically balanced shaft
Noise levels
Tower type Typical level
Conventional 75–85 dB(A)
Low noise 65–72 dB(A)
Silent / Super silent 55–62 dB(A)
Client: Industry.
Location: Joanópolis/SP.
