Design, fabrication and installation of aero-acoustic components

TEST CELLS FOR AIRCRAFT ENGINES OR INDUSTRIAL GAS TURBINES

Silentec designs, manufactures and installs aero-acoustic components for aircraft engine and industrial turbine test benches.

This includes gas intake and exhaust silencers, directing, flow correctors, increaser tubes, diffusers, doors, windows and absorbent panels on walls and ceilings.

As part of its overall acoustic guarantee, Silentec carries out noise studies and surveys in addition to acoustic recommendations for construction details of the building and its services.

Installation of silencers & power turning flaps

INDUSTRIAL GAS TURBINES, POWER GENERATION FACILITIES

Silentec works with power generation equipment suppliers to control the environment and noise in the workplace. We have full support for noise, as follows:

Environmental noise assessment, including infrasound investigation, creation criteria, noise budgets of various components and predicting sound levels.
Design, manufacturing & installation of silencers & acoustic enclosures and obstacles.
Finally, post-construction noise acceptance testing.

Silentec participated in the engineering, manufacturing and installation of the emissions control system for the exhaust gases of the General Electric frame 7 gas turbines for power plants. On the indicated site, Silentec worked on the gas flow and the envelope. It includes thermo-acoustic lined exhaust ducts, housings and stacks, muffler baffles and flow improvement components. Silentec guaranteed working and environmentally friendly noise levels as well as a low pressure drop. Construction was completed in 2005. Performance delivered.

The photo shows the 17' diameter x 110' high neutralized SCR chimney downstream of the gas turbine.

Quiet is expected around Healy, Alaska, where a clean coal power plant is being built. Unmitigated noise from the chimney, particularly from fans, risks being heard at great distances. Silentec has designed and manufactured a dissipative silencer for the fireplace. This includes a modal filter and other special features, making it compatible with the addition of speakers for active noise cancellation.

STACKS & SILENCERS FOR FANS AND DUST COLLECTORS

Silentec designed and manufactured over 18 chimney silencers at Sorel-Tracy, QIT's factory between 2003 and 2008, as part of the environmental noise reduction program. Most were downstream electrostatic dust collectors, like this 60' tall & low pressure drop muffler bullet. Other stack-silencers were supplied in a stack or conduit, as well as a permanently mounted noise monitor. Silentec also carries out periodic maintenance and cleaning operations when necessary.

The photo shows the insertion of a 60' high silencer into a 180' high chimney.

A 60' high silencer in a 180' high chimney

TLT-Babcock was required to supply and install 2 blowers to supply 700,000 cubic feet per minute of preheated air to an underground mine in Asbestos (Quebec). The Ministry of the Environment requires that the existing ambient noise level outside single-family residences not be increased to 1,500'. Silentec sampled environmental noise day and night, developed noise reduction targets and presented a report for approval. Then, Silentec designed, manufactured and installed a soundproof building with metal cladding, equipped with louvers, silencers, enclosures, windows, doors and hatches. Thus, the noise of the huge draft fans, motors, burners, pumps and other equipment is contained inside this Silentec sound-absorbing envelope.

Environmental and workplace noise in these factories has increased mainly from production and the addition of air handling systems for pollution control.

Silentec supported its customers throughout the process, from investigating problems to implementing permanent solutions. Environmental noise surveys and diagnostic tests of noise sources were carried out and correlated with complaints from residents living nearby. Respectful dialogue and information sessions with the citizens' committee and local government enabled the prioritization of noise sources. Silentec solutions identified and budgets.

silencers FOR COMMERCIAL AND INDUSTRIAL FANS

The air transported by fans often carries excessive noise which requires a silencer designed and manufactured by Silentec in its Montreal factory.

Noisy roof ventilation treated by air outlet silencer

Noisy roof ventilation units treated with air outlet silencer, acoustic engine cover with quiet air access and sound-absorbing duct covering with acoustic wool and lead septum