In a power station, e.g. with one or more combustion turbines and one or more generators, noise is emitted, which could, if not heeded, deprive the residents of their tranquility and be a nuisance for the working conditions of the plant's employees.
Consideration should therefore be given to works to limit the noise impact of such installations.
The construction of buildings with high acoustic performance housing the incriminated noise sources is of course an appropriate solution, but it is then necessary to envisage consequent ventilation systems to take account of the calorific emissions of the various equipment: they are an integral part of the industrial soundproofing hardware required in the circumstances.
Furthermore, the need to size and build such structures and to supply all its components in accordance with international standards and rules but also taking account of local regulations which are sometimes little used elsewhere is a difficulty that must be overcome on the occasion of each project. In-depth studies are thus necessary, for the development of technical solutions, in different fields (bringing together all the required skills within the same team able to commit to the varied performances in relation to such contexts. is not nothing):
- acoustics: to obtain sufficiently low sound pressure levels (at specified locations, at a short distance from the soundproofing enclosures walls and roof), in relation to the sound attenuation of the partition elements and their assembly system, which must be waterproof and in relation to the sound absorption properties required, on the noise sources side, so as not to amplify the sound levels inside the enclosures
- resistance of materials: for a durable maintenance of the construction (in particular of the structural elements) in the climatic and seismic conditions of the site
- ventilation: for an appropriate evacuation of the thermal power of the enclosed elements
- electricity: for an efficient installation in terms of accessories of all kinds
ITS will participate in the acoustic insulation of a power station involving two high-power gas turbines (more than 120 MW in single cycle, more than 190 MW in combined cycle) in West Africa.
Given the noise levels emitted - the sound power level of the turbine is of the order of 135 dB (A), with a very wide frequency spectrum of 20 to 20 kHz - the construction systems to be considered will be distinguished by their very high performance in terms of soundproofing.
Care must be taken to make it possible to install it on site by a local workforce while taking into account the constraints of access and removability related to maintenance of high-tech hardware in the context of this acoustic insulation of a power station.