Exhaust Silencers

Controlling noise pollution from engine exhausts is a challenge for all organisations in the power generation market. It is essential that diesel and gas engine applications have the required noise control measures in place that ensures the facility meets with the relevant noise specification for health & Safety and the environment. IAC Acoustics is the global market leader in noise control engineering and is one of the premier manufacturers of engine exhaust system silencers. We have developed a range of absorptive and reactive engine silencers to satisfy most applications within the power generation sector:

Absorptive silencer: 15dB(A) to 25dB(A)
Reactive silencer: 30dB(A) to 50dB(A)

Diesel Exhaust Silencers

A key element of a complete noise control packaged solution for power generation activities, via diesel or gas engine gensets, is the treatment of exhaust gases. Without effective exhaust gas treatment, the overall noise control design won’t be effective in reaching the client specification. Equally as important is the careful venting and potential after-treatment of these gases in order to move them away from the engine intake ventilation system and from human consumption. In order to protect employees from excessive plant noise and to comply with statutory regulations, installing diesel exhaust silencers or diesel generator silencer will support the delivery of an effective noise control solution, eliminate noise-induced hearing damage of personnel and prevent wider environmental noise issues.

Noise reduction can be attained using two principles of design specification – a reactive silencer affects noise reduction through reflecting and interfering with the transition of sound waves through the silencer. An absorptive silencer affects broadband noise by using an absorptive acoustic infill design and provides a low pressure drop.

Reactive

Absorptive

Typical performance characteristics and options include:

Performance range 10-50 dB(A)
Skin temperature reduction
Cylindrical, box and other shapes available
Catalytic silencers
Spark arrestors
Variable configurations of inlet and outlet position
Horizontal or vertical applications
Wide range of accessories and installation components

Key Features

Engine exhaust silencers from IAC Acoustics reduce engine exhaust noise from all types of internal combustion engines including petrol, diesel or gas. Our diesel exhaust silencers have the following key characteristics and attributes:

Specific applications: co-generation, marine, rail, power generation (standby and prime power)
Circular, rectangular, or oval design
Diverse material types to suit application
Radial or axial intakes
To satisfy the current environmental requirement, all silencers can be supplied with catalysts or selective catalytic reduction (SCR) systems
Standard and Bespoke Engine Exhaust Silencers

In addition to our range, IAC also offer special or tailor made silencers to suit customer specific requirements.

Our standard diesel exhaust silencers are available in stock and offer a noise reduction of 15dB(A) to 50dB(A) using single units. However, if a greater noise reduction is required then this is possible by the use of multi-stage units.

A full accessory range of flanges, bellows, elbows, gaskets, nuts/bolts are available to compliment the silencer range. Other options include:

The ability to integrate catalytic converters into the engine silencers
Spark-arrestors are also available and can be supplied separately or integrated in silencers

Our Market Sectors

Biomass energy plant with green anaerobic digester tanks and storage silos under a clear sky

Aerial view of a water treatment plant with blue digester tanks and circular sedimentation basins

Petrochemical refinery with flare stack burning against a blue sky, distillation columns and storage tanks

We provide exhaust silencer noise control solutions to a wide range of sectors and disciplines. Working with consulting engineers from design and specification through to contractors and clients for project implementation – we commonly deliver diesel exhaust silencer systems to the power and process sectors;

Diesel Reciprocating Engines

CHP Plants

Fossil Fuel Power Plants

Gas Reciprocating Engines

Waste to Energy

Marine

Industrial

Oil and Gas

Cival & Military

UPS Installations

Application Range

Typical application of exhaust silencers for reciprocating engines means our products have a working temperature range of up to 450°c and approximately 5000Pa pressure level. For operation at higher temperatures an expansion system is required to absorb system and component movement.

We recommend our range of anti-vibration mounts between the engine enclosure and silencer support structure, to minimise structural vibration and improve overall attenuation performance.

Sizing

Our diesel exhaust silencers can be selected to a wide range of applications across reciprocating engines and other noise sources. Noise level targets are typically at a specified distance from the silencer and are dependent on the;

Mass Flow rate
Residual Noise Level
Pressure Drop
Skin Temperature

Due to the many variables and the complexity of silencer sizing, selection, and design, computer optimisation methods are employed. The size is generally dictated by required noise reduction and allowable pressure drop.

Materials

Silencer components are generally constructed from carbon steel. However, they may be constructed from other materials to meet specific design or application requirements such as high temperature or corrosive environments

Materials such as stainless steel and corten steel can be specified in the initial project discovery phase.

Optional Design Features

We have a wide range of add-on options and components to complement and complete you exhaust silencer configuration or project installation. Please consult with our of our specification team to learn more – we can deliver you a turn-key project solution which integrates a full noise control enclosure or treatment package, supplemented by a complete exhaust silencer configuration:

Catalyst
Integrated spark arrestors
Special outdoor protection (metal spray)
Other material (stainless steel, corten steel)
Flanges, counter-flanges, gaskets, bolts
Supports

Horizontal

Vertical