Gas Turbine Handbook : Principles and Practices

166 Gas Turbine Handbook: Principles and Practices
SUMMARY
The complexity of combustion turbine systems and their ancillary
equipment generally require an acoustical engineer well experienced
with such systems to fully analyze the acoustical emissions
and make a determination whether the expected sound levels meet
regulatory requirements, are in balance with the environment or
community, or need some level of noise mitigation. Another element
of these packages is the ease to upgrade and/or relocate units to
new sites. It is strongly advised to investigate the potential environmental
noise (as well as regulatory) impact of installing these
units as part of the search process before committing to installing
units at a particular site. Particular attention must also be paid to
regulatory agencies if upgrading or modifying existing combustion
turbines particularly the exhaust system as this may impact existing
air permitting ( EPA exhaust emissions) and/or other regulations that
may become applicable in such cases.
References
1. George F. Hessler, Jr. “Controlling noise impact in the community
from power plant operations—recommendations for ambient
measurements,” Noise Control Engineering Journal Vol. 48, No.
5, 141-150 (2000)
2. George F. Hessler, “Beware low-frequency gas-turbine noise,”
POWER magazine, pp 78-80, July/August 2001
3. Bruce E. Walker, Alan S. Hersh, et al., “Active Control of Low
Frequency Turbine Exhaust Noise,” Proc. NOISE CON 2000, 3-
5 Dec. 2000, edited by John Van Houten (The Institute of Noise
Control Engineering of the U.S.A. Inc. Washington, DC, 2000),
4. Lisa A. Beeson and George A. Schott, “ Low Frequency Noise
Considerations for Combustion Turbine Projects,” Proc.
International Gas Turbine & Aeroengine Congress & Exhibition,
2-5 June 1997, (ASME, NY 1997)
5. Acoustics—Attenuation of sound during propagation outdoors—
Part 2: General method of calculation, International Standard,
ISO 9613-2 (© ISO 1996)
6. Gas Turbine Installation Sound Emissions, American National
Standards Institute, ANSI B133.8—1977 (R2001) (American
Society of Mechanical Engineers, ASME, 2001)