Chillers are one of the noisiest pieces of equipment used in commercial buildings, especially air-cooled chillers, which move a lot of air through the condenser fans. Chillers may be placed on roofs or intermediate roofs with office windows next to them. Chillers can be a noise problem with the condenser fans and compressors generating a lot of noise. In fact, the noise can be high enough for the building owner to be in contravention of the Municipal Noise By-Law regulations. This means that the building owners can be fined, sued or both of the noise problems are not resolved.
Fan and air noise is one of the main culprits in chillers. The fan and air moving through the condenser makes broadband noise. As fan blades cut through the air, they generate high pitched noise that can be a noise problem.
Vibro-Acoustics has designed and manufactured solutions for chiller condenser fans. These are low pressure drop silencers with access sections built into them for ease of fan maintenance access.
Low Static Pressure on Condenser Fans
Axial fans on chiller condensers do not have a lot of static available to them. Silencers selected off a catalogue cannot work with these fans because the pressure drop with system effects might choke the fans and cause the chiller to malfunction.
Vibro-Acoustics chiller condenser fan silencers are specifically designed with a low static pressure drop so that chiller operation is not compromised for want of air flow.
Condenser Fan Maintenance
Silencers on top of the fan block maintenance access to the fans.
Vibro-Acoustics provides access sections and doors for condenser fan silencers to ensure ease of maintenance access.
In addition to fan and air noise, compressors are also a source of noise from the compressors. The compressor noise can be a nuisance for those within line of sight, especially with occupants close to the chiller.
Vibro-Acoustic have designed barriers and enclosures for chillers that ensure that noise does not become a menace to nearby occupants. In some cases, whole enclosures have been designed and manufactured with silencers at the intake and discharge of the chiller. The chiller manufacturer’s concerns for air flow were addressed to the extent that the warranty was honored.