Exhaust silencer
Effective reduction of noise emissions
The operation of modern combined heat and power plants, biomass plants and oil and gas boilers often brings with it unwanted noise pollution. In addition to the noises in the boiler room, the combustion noises carried along with the exhaust gas represent a source of emissions that should not be underestimated.
The more medium- and high-frequency noises of modern heating systems, like the primarily low-frequency hum of combined heat and power plants, are carried on via the exhaust pipe and chimney. At higher sound levels, these can be perceived as disturbing both in the living rooms and in the neighbourhood.
For years, Jeremias has been actively developing acoustic solutions for exhaust systems that effectively reduce such noise pollution. Our own silencer test bench underlines our outstanding quality standards.
Take advantage of our more than 10 years of know-how and our extensive services on the subject of sound insulation!
Heat generators and their characteristic frequencies
Depending on the type of heat generator, the disruptive operating noise usually follows characteristic frequency patterns. With the right type of exhaust silencer, tailored to the respective frequency range, the interference frequencies can be minimized and the noise level reduced to the desired level.
| Frequency range | silencer type | silencer series for | ||
|---|---|---|---|---|
| boiler | chp | biomass | ||
| predominantly medium and high frequency | absorption silencer | ASD | AED | AVD |
| predominantly low frequency | reflection / resonance silencer | RSD | RED | |
| broadband frequency frange | combined silencer | KSD | KED | |
boiler
The exhaust gases produced during the combustion process are released into the environment via the exhaust system. Here, flame noises from the boiler room as well as the “whirring” of the fan installed in condensing boilers can be transmitted. As a rule, these are medium and high-frequency noises that can be reduced using an absorption silencer. Especially with newer forced-air burners, the use of a combined silencer or a pure resonance silencer may be necessary for a broader range of damping.
combined heat and power plant / generators
In combined heat and power plants and generators, a motor primarily generates electrical power, with additional usable heat being generated in the CHP plant. The engine noise is often noticeable as a low-frequency hum; the individual frequency spectrum and thus the selection of the appropriate type of silencer depend to a large extent on the number of cylinders and the speed of the engine.
Biomass boiler
The combustion of biomass such as wood, pellets or wood chips is almost silent. In this case, integrated fans are solely responsible for annoying, mostly medium to high-frequency noises. Due to the more aggressive composition of the exhaust gases, it is advisable to use an adapted absorption silencer with resistant glass silk fabric for biomass boilers.
