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Hsin Tao Combined Cycle Project
Taiwan, R.O.C.
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As a subcontractor to the EPC contractor,
Hessler Associates was responsible for the
overall acoustical design of the facility.
Extensive noise modeling work was carried out
during the detailed design of the facility to
optimize the amount of noise mitigation required
to meet the stringent property line noise limits.
Field testing of the completed facility demonstrated
full compliance with all contractual requirements.
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Wind Farm Noise Modeling
Western Pennsylvania
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As a part of the project development/permitting work the noise from various turbine layouts was
modeled to evaluate potential sound levels at all relevant property boundaries under various wind speeds
and directions. The project also involved an ambient sound level study of the site vicinity in order to
quantify the existing environmental sound level at a number of residences and evaluate the relative
audibility of the future generator units.
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FMC Trona Mine
Green River, WY
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An auxiliary boiler was generating not only high tonal noise levels
but also concerns about possible mechanical failure or malfunction.
After a detailed survey it was found that a cavity cross-mode
resonance was occuring. An internal baffle plate was recommended
and installed to break up the resonance. Follow-up measurements
indicated that the tone had been eliminated.
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Bermuda Electric Light Company, Ltd. Pembroke Station
Hamilton, Bermuda
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Hessler Associates was hired by
BELCO to make a detailed assessment
of existing noise emissions from the
sprawling and acoustically complex
Pembroke Generating Station,
recommend feasible noise reduction
measures and develop noise criteria
for future expansion projects. Follow
on work included a design review of
a new diesel power block and field
testing of the completed installation to
assess compliance with noise criteria
developed in the initial study.
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Waste Management, Alliance Sanitary Landfill
Taylor, PA
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A field study was carried out to quantify the
noise emissions from landfill operations
in the surrounding community and to
differentiate site activity noise from other
ambient sources. Long-term remote monitors,
spectral analysis, property line measurements,
and sound power level quantification of all site
operations were used in the assessment.
The data and subsequent analyses definitively
showed that essentially all significant noise
at the nearest residential land uses was due
to off-site sources not associated with landfill
operations.
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General Electric Co. Centro Puerto Power Station
Buenos Aires, Argentina
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Hessler Associates was contracted by General
Electric Co. to conduct an exhaustive sound
power level study of all the equipment
comprising a typical combined cycle power
plant with Model 9FA turbines. The objectives
of the field study were to provide source power
levels for future noise modeling, quantify and
fully understand the noise emissions of plant
equipment, and look for practical ways to
reduce the near field noise levels generated
by the dominant sources.
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BG Hannibal Gas Treatment Facility
Sfax, Tunisia
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In order to quantify existing facility noise levels
and to evaluate the potantial impact of a major
plant expansion, a detailed survey of the
entire facility was conducted to measure the
current sound power level of every significant
source for use in an analytical noise model of
the project. Practical noise mitigation options
were developed for all high noise areas and
suitable specifications for future equipment
were provided.
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1600 MW Power Plant Compliance Assessment
Saudi Arabia
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Near field noise guarantee compliance tests
were performed on every piece of equipment
(such as fans, pumps, generators, transformers,
valves, etc.) and within every room of every
building (such as the control room, inside noise
enclosures, electrical rooms, offices, mosques,
etc.). Remedies were developed for any
components or spaces that tested above the
specification level.
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Reactor Hall Acoustical Evaluation NIST Center for Neutron Research
Maryland, USA
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A evaluation was done of the noise sources and
acoustical properties of the reactor hall at the
National Institute of Standards and Technology
to determine what could be done to lower the
general noise level thoughout the building.
Reverberation tests and other measurements
indicated that a combination of source noise
mitigation and an application of wall and
ceiling absorption would yield the maximum
benefit.
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Noise Control for Industrial Facilities
