Exhaust Silencers
Effective Reduction of Sound Emissions
The operation of modern combined heat and power (CHP) units, biomass plants, as well as oil and gas boilers often brings with it unwanted noise disturbance. In addition to the noise in the heating room, combustion noises carried by the flue gas are a significant source of emissions.
The mid- and high-frequency sounds from modern heating systems, as well as the predominantly low-frequency hum from combined heat and power units, are transmitted through the flue gas system and chimney. At higher sound levels, these can be perceived as disturbing in both living spaces and neighboring areas.
Jeremias has been actively developing acoustic solutions for flue gas systems for years, effectively reducing such noise disturbances. Our own silencer testing facility highlights our exceptional commitment to quality.
Benefit from our over 10 years of expertise and extensive services in the field of sound insulation!
Heat Generators and Their Characteristic Frequencies
Depending on the type of heat generator, the disturbing operational noise usually follows characteristic frequency patterns. By using the appropriate flue gas silencer type, tailored to the specific frequency range, disruptive frequencies can be minimized and the sound level reduced to the desired level.
| Frequency Range | Silencer Type | Silencer Series for | ||
|---|---|---|---|---|
| Boilers | CHP | Biomass | ||
| primarily mid- and high-frequency | Absorptive silencer | ASD | AED | AVD |
| primarily low-frequency | Reflection / Resonance silencer | RSD | RED | |
| broadband frequency range | Combined silencer | KSD | KED | |
Boilers
The flue gases generated during the combustion process are released into the environment via the flue gas system. Flame noises from the boiler room as well as the "whining" sound from the fan in condensing boilers can be transmitted. These are typically mid- and high-frequency noises that can be reduced using an absorptive silencer. Especially in newer fan burners, the use of a combined silencer or a pure resonance silencer may be necessary for broader frequency damping.
Combined Heat and Power (CHP) Units / Generators
In combined heat and power (CHP) units and generators, a motor primarily generates electricity, with additional usable heat produced. The motor noise is often noticeable as a low-frequency hum. The specific frequency spectrum and thus the selection of the appropriate silencer type are largely influenced by the number of cylinders and the engine speed.
Biomass Boilers
The combustion of biomass such as wood, pellets, or wood chips is nearly silent. Disruptive, usually mid- to high-frequency noises are caused by integrated fans. Due to the more aggressive composition of the flue gases, biomass boilers are recommended to use an absorptive silencer with a durable glass fiber fabric designed for this purpose.
