USD
GBP
EUR
Combined cycle gas turbine power generation, with its outstanding advantages of high efficiency, flexibility, and cleanliness, has become an important component of modern power systems. However, its process generates high-intensity noise at multiple stages, posing a challenge to the occupational health of plant personnel and the quality of the surrounding acoustic environment. Sanyuan Environment, with its extensive experience in industrial noise control, provides a systematic analysis of the noise sources for such projects and offers comprehensive solutions covering the entire process.
I. Identify the main noise sources: Understand the noise characteristics from the source.
Gas-fired steam combined cycle power generation systems have numerous noise sources, characterized by high sound pressure levels, complex frequencies, and concentrated distribution. They can be mainly classified into the following categories:
gas turbine
As a core piece of equipment, it is one of the largest noise sources in a power plant, with noise levels typically exceeding 100-110 dB(A). Its main noise sources include:
Aerodynamic noise: jet noise generated by high-speed exhaust, with a wide frequency band and long propagation distance;
Mechanical noise: vibration and noise generated by the high-speed operation of components such as turbines and compressors;
Combustion noise: The low-frequency rumble generated by fuel combustion in the combustion chamber.
Waste heat boiler system and steam turbine
Boiler exhaust/venting noise: The periodic emission of high-temperature and high-pressure steam into the air produces an extremely strong mid-to-high frequency howling noise, which is one of the most sudden and impactful noises in a power plant.
Steam turbine noise: Mechanical noise generated by the operation of steam turbines and their auxiliary equipment.
Large auxiliary systems
Generator and exciter: electromagnetic noise and cooling fan noise.
Various pump sets (circulating water pumps, feed water pumps, etc.): motor operating noise and fluid dynamic noise.
Air compressor: Significant noise and vibration during intake and exhaust.
Cooling tower group: aerodynamic noise from the fan group and water spray noise.
Other noise sources
Piping system: regenerative noise generated by high-speed fluid (steam, gas) transportation and valve throttling noise.
Transformer: Continuous power frequency electromagnetic humming.
II. Systematic Governance Measures: Creating a Quiet Factory Across the Entire Area
Sanyuan Environment adheres to the governance principles of "noise reduction at the source, blocking transmission routes, and protection of sensitive points," and provides one-stop customized solutions.
1. Gas turbine and waste heat boiler area
Soundproof enclosure: A modularly designed, high-efficiency ventilation and soundproof enclosure for gas turbines and waste heat boilers, integrating sound insulation, ventilation, heat dissipation, and maintenance functions, with noise reduction of 25-35 dB(A).
Exhaust noise reduction: For the high temperature and high pressure exhaust of gas turbines, an ultra-large impedance composite silencer is designed and installed to effectively suppress high-frequency and low-frequency noise.
Boiler exhaust noise reduction: Installing high-efficiency exhaust silencers at the exhaust ports of safety valves and pressure relief valves is key to controlling sudden, strong noise.
2. Steam turbine and auxiliary equipment workshop
Factory sound insulation: Sound-absorbing and sound-insulating wall/roof systems are used for the turbine room and auxiliary equipment room, and soundproof doors and windows are used to turn the entire factory into a "soundproof enclosure".
Ventilation and noise reduction: Design noise-reducing louvers or ducts for the factory's forced ventilation system to resolve the conflict between heat dissipation and noise reduction.
3. Outdoor equipment and piping systems
Sound barriers: High-efficiency sound barriers are installed around high-noise equipment areas (such as cooling towers and air compressor groups) that are close to the factory boundary to specifically block the outward transmission of noise.
Equipment vibration reduction: Flexible foundations and vibration dampers are installed for pump sets, compressors, etc., and elastic supports and wall seals are installed for piping systems to completely cut off the "structural sound transmission" path.
Pipeline wrapping: Sound insulation wrapping measures are used for high-noise pipelines to suppress fluid noise radiation.
4. Protection of plant boundaries and sensitive points
Plant boundary noise compliance planning: Predict the noise contribution value at the plant boundary using acoustic simulation software, optimize the overall layout and control measures, and ensure that the plant boundary meets the standards after operation.
Soundproof windows: For sensitive buildings very close to power plants, soundproof and ventilated windows can be installed as a last resort.
Combined cycle gasification power generation is a vital force in energy transition, and its green benefits should not be diminished by noise pollution. Sanyuan Environment is committed to helping power customers achieve multiple goals-environmental compliance, safe production, and community harmony-through scientific, economical, and efficient comprehensive noise solutions.