Acoustic Enclosures - Acoustic Containers - Sound Attenuators - Engine Exhaust Silencers - Acoustic Doors - Weatherlouvres - Air Dampers - Fire Dampers - Ventilation Products

 

 

For diesel or gas powered generator sets.

 

DESIGN STYLES OF ACOUSTIC CANOPIES

 

 

85dBA at 1 metre, 80kVA Generator Set

 

75dBA at 1 metre, dropover type canopy

 

Landfill gas powered Generator Set

 

Small canopy in our workshop

 

Base lifted canopy

 

We are able to offer a standard range of acoustic enclosures, specifically designed for use with diesel engined generating sets. They are principally of the drop over design, although a fully de-mountable option is available for applications where installation space is limited. The drop over design has the advantage of low installation time, quick access to the generator set for major maintenance, integral weatherproofing and it may be re-used at alternative sites. A further option using an acoustically treated ISO container is available. This offers the advantages of easier handling for transport and off-loading with no extra packaging being required.

Our low cost, flat pack range is as follows:

Acoustic Performance.

Acoustic performance is designed to match individual customer requirements and is usually based upon the proximity of the generating set to noise sensitive areas such as residential properties, offices etc. We have a comprehensive library of engine manufacturers' noise level data, together with engine exhaust gas and radiator/fan cooling air details. From this we are able to quickly determine the most economic system to meet the noise level specified. Engines ranging from 10 - 1000 KVA output can emit from 90 up to 110 dBA at 1m distance. A typical acoustic enclosure would reduce this noise by approximately 25/30 dB.

The chart shows three typical ranges of acoustic performance which can be attained with an acoustic container.

Noise levels decay with increasing distance and the chart shows the reductions that can be expected. The end customer will either expect you to suggest a suitable noise level, dependant on the actual site conditions, how close the neighbours are (who have every legal right to sue the operator for nuisance if they choose) and the best orientation to direct hot air and exhaust fumes away from sensitive areas - or will set his own limits required.

As a guide, where business or residential neighbours are likely to be affected by noise from the generator set, a local authority would suggest a limit of 45dBA at the boundary of the property for daytime - or 35dBA for nightime operation.

Where precise noise limits are set, the equipment must be designed correctly. We will be pleased to assist with individual requirements.

Ventilation Requirements

The cooling air requirements for each generator set must be determined before accurate sizing can take place. This mostly involves obtaining information from the radiator manufacturer, where they should be able to advise airflow volume and additional fan pressure (ie pressure available over and above the requirements of the radiator alone), with regard to the operating ambient temperatures. This additional pressure is what enables the radiator fan to overcome the resistance caused by the attenuation equipment, dampers, weatherlouvres, mesh guards, etc.

The selection of attenuation must be designed correctly to avoid any possibility of overheating.

Constructional Specification

The standard range of acoustic enclosures are constructed using 75mm thick acoustic panels, fixed onto a 2.5mm thick, zinc coated steel framework. The panels have a 1.6mm thick zinc coated steel outer skin, with the acoustic infill retained in place behind 0.7mm thick, perforated galvanised sheet steel. The complete assembly has an external grey etch primer paint finish, suitable for an additional paint treatment, if required. The heavy density rockfibre acoustic infill is inert, vermin proof and non-hygroscopic. It has a Class 1 spread of flame certificate to BS 476, part 6 and has a bonded glassfibre mesh scrim facing, to prevent fibre migration. The type 38 dB acoustic doors have an outer steel skin, with an acoustic infill sandwich. They are fitted with a lockable slam fastening handle with an internal panic release button and compressible extruded Neoprene seals. Where double glazed windows are fitted, these use 6mm thick toughened glass panels set into an extruded Neoprene outer frame.

For further information please contact CES at

OFFICES/ADMIN
WORKSHOP
Unit 5 Chancers Farm, Fossetts Lane, Fordham,

Colchester, Essex, CO6 3NY

ENGLAND 

tel 01206 240788

fax 01206 240099
Unit 5 King Edward Industrial Park,

Colchester, Essex, CO6 3NY

ENGLAND 

tel 01206 862111

fax 01206 862299
email colengsys@aol.com

  

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 last updated

080904