The Plovdiv-based bread and bakery products manufacturer, Simid Agro, is building a thermal power plant based on gas generators that produce steam, electricity, and hot water. To this end, they have constructed a separate building within their factory premises to house the generators. There are two generators, and for their proper operation, a ventilation system for cooling and an electrical substation are required.
Since the Simid Agro building and factory are located about 200 meters from a residential area, the Acoustic Force team was called in to assess the potential noise pollution that these gas generators could cause.
The gas generators operate 24/7 for a span of seven years, which means continuous emission of excessive noise.
Our team arrived at a stage where the building had already been constructed, the diesel generators were installed, and provisions for doors, air ducts, and cooling had already been made.
Our work began with an assessment of the existing project, after which we recommended additional measures that needed to be implemented. Using software calculations, we created a noise map that evaluated the projected sound levels and indicated that, with the measures initially in place, the diesel generators would still cause disturbance to the residents living near the factory.
To bring the noise levels within regulatory limits, we issued a series of recommendations that both the contractor and the client needed to implement in order to ensure maximum noise reduction for the facility.
The measures included: replacing the already ordered doors with soundproof doors with a 45 dB rating; soundproofing all air ducts running along the façade, along with detailed recommendations for their treatment; constructing soundproof partitions inside the room where the operators would be located, with design details provided; and adding additional metal grilles to help reduce the noise escaping through the cooling vents.
The Acoustic Force team was commissioned to manufacture the acoustic metal grilles in compliance with the required standards set out in the project. Our team designed and assembled the grilles in the Acoustic Forceworkshop. Delivery and assembly took about one week. Afterwards, our engineer visited the site to provide clear and precise instructions, along with drawings, on how to install everything correctly. The project concluded with a thorough inspection of all the recommended details and the preparation of a final report. At the end of the year, tests and noise measurements will be carried out to determine whether the generator noise complies with regulatory requirements in residential buildings.
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