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TRANSCRIPT
An Overview of Noise Control in the Power Industry
Bennett M. Brooks – United Acoustic Consultants 27 Hartford Turnpike Vernon, CT 06066 Frank H. Brittain – Bechtel Corporation P.O. Box 193965 San Fransico, CA 94119
Presented at the Acoustical Society of America - 122nd Meeting Houston, Texas – 5 November 1991
An Overview of Noise Control in the Power Industry
- What is a Power Plant
- Typical Noise Sources
- Regulatory and Licensing Requirements
vs. Community Response
What is a Power Plant? Electricity Producers
- Steam
- Gas (Combustion) Turbine
- Combined Cycle
- Wind, Hydro, Solar Energy Transporters
- Gas Pipeline Compressor Station
- Steam Loop
- Electric Transmission Lines
Steam Power Plant Boiler Produces Steam
- Fossil Fuel Fired (Coal, Oil, Natural Gas)
- Nuclear
- Combined Cycle
- MHD Steam Drives Turbine/Generator
- 10 to 50 Mw Demo
- 150 to 1500 Mw Full Scale
Typical Noise Sources
Fans
Forced-Draft (FD), Primary-Air (PA), Induced-Draft (ID) Cooling
Pumps
Boiler feed, Lubrication oil, Cooling water
Turbine/Generator
Combustion exhausts Gas turbine, Recips
Steam admissions/discharges
Fuel handling operations
Pipe radiation
Electrical transformers
Regulatory and Licensing Requirements vs. Community Response
Regulations
Federal – EPA, FERC State – DEP (Widely Varying) Local – Ordinance (Widely Varying or non-existent)
Licensing
Usually driven by compliance with regulations ‘Operable’
Community Response
Annoyance – Subjective Tonal content Steady or Impulsive
Noise Regulations
- Based on A-Weighted Levels
- Leq (Equivalent Noise Level)
- Ldn (Day-Night Noise Level)
- Sometimes Address Tones, Impulses
Noise Metrics T Leq = 10 Log (1/T) (Pa(t) / Po)2 0 where Pa = Instantaneous A-Weighted Acoustic Pressure
Po = 20 micro-Pascals Ldn = 10 Log ( 15/24 Pd + 9/24 Pn ) where Pd = 10(Leq(day)/10)
Pn = 10(Leq(night) + 10) /10
Conclusions
- ‘Power Plant’ describes many configurations and types of energy/power facilities
- Typical noise sources respond to conventional treatment strategies
- Compliance with noise regulations does not guarantee community satisfaction