Document Detail


Designing petrochemical plants to permit retrofitting of any additional controls needed to meet community noise limits.
MedLine Citation:
PMID:  19355110     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Designing petrochemical, power, or industrial plants to meet community noise limits can be expensive. To meet stringent limits, incremental costs often exceed one million dollars per decibel. There is considerable uncertainty, including: overly conservative or unrepresentative vendor noise data, limitations of ray-tracing software, questionable accuracy beyond 1000 m, lack of TL and absorption data below 125 Hz, unreliable IL data for pipe lagging at all frequencies, unexpected operating conditions, and vendors not meeting their equipment noise limits. Atmospheric effects can cause variations of A-weighted community noise levels of 25 dB at 100 m from a refinery, which can make meeting a not-to-exceed noise limit difficult and risky. Further, lack of experience with noise control of any participant (noise control engineer, project, owner, regulators, or vendors) can substantially increase uncertainty. Including sufficient noise controls to cover these uncertainties will be expensive, often overly conservative, and often unnecessarily expensive. One way to substantially lower costs and risks is designing the plant to permit delaying some but not all controls until start-up-if needed. This paper describes the planning needed to permit a partial reliance on retrofit controls, what type of controls can be delayed until start-up, and space allocation. Examples are included.
Authors:
Frank H Brittain
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  125     ISSN:  1520-8524     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2009 Apr 
Date Detail:
Created Date:  2009-04-09     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2629     Citation Subset:  IM    
Affiliation:
Bechtel Corp., 2255 Peavine Valley Rd., Reno, NV 89523.
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