How we helped
Commissioned by a large-scale chiller manufacturer, Trinity conducted a comprehensive review of noise emissions from a variety of rooftop mechanical plant. Using an acoustic camera among other testing methods, our specialist noise engineers were able to recommend targeted noise management solutions that were both cost- and time-efficient.
Our client wanted to assess options for upgrading a specific set of compressors within an existing chiller system and to identify potential noise benefits or items requiring further mitigation measures.
We used the BeamformX Acoustic Camera and NATA-calibrated sound level meters to collect data from a potential supplier’s compressor unit and its related pressurised pipe network. These units were already installed and operational elsewhere, allowing testing to be conducted at a location with an active unit.
Our investigation involved documenting the testing process, undertaking analysis and predicting impact for compliance with local council noise policies. We evaluated the likely effects of retrofitting the new measured compressor noise levels into the existing facility and provided a relative performance comparison with the existing chiller data.
Leveraging the acoustic camera, we were able to identify noise sources by isolating noise contributions based on the frequency and location of origin, such as valves and pipe elbows. These are not able to be identified by the human ear or decibel meter.
The acoustic camera helped detect the noisiest chiller components, the frequencies they influenced, and their precise location within the system. The technology enabled our client to focus noise mitigation efforts on the optimal areas of the units and explore solutions where pipes/valves could be adjusted to minimise the associated noise.
Instead of installing costly noise barriers or enclosures around the chiller units, a minor design change was implemented to reduce the noise from the identified loudest component. This adjustment significantly reduced cost and time for both the supplier and their clients (compared to other proposed solutions), as well as assurance to the end-user on likelihood of in-situ compliance with noise targets once installed.
About the project
The client is one of Australia’s leading chiller plant manufacturers, with their units in service across the country. The associated mechanical plant are the primary environmental noise sources requiring management and mitigation. Following Trinity’s noise investigation, the existing chiller compressors and pipe network have been upgraded with quieter components.
