HomeMy WebLinkAboutSubmittal LetterDISTRIBUTOR
l 47 LIGH
cORPQRATION
June 14, 2006
SeaView Research
3898 NW 7th St
Miami, FL 33126
Ref: Noise abatement
Mr. Bruce Wilner:
R B GROVE, INC,
1881 NW 93 AVE
DORAL, FL 33172
305-477-0277
SON17:7";'!TO THE
PUBLIC RECORD FOR
ITEM.z-ON (cia')a•
OVERVIEW
Two diesel generators (300kw & 70kw) located at 3898 NW 7th Street.
These units are located on the south side of the property situated between the owners
building (4-story) and a perimeter wall approximately 6' in height. Behind this wall are
residential homes.
Sound pressure levels for this design product are approximately 90 dba.
OBJECTIVE
To reduce the sound pressure levels on the existing products.
EXHAUST noise may be reduced by upgrading the current industrial grade silencers to
hospital grade silencers yielding an insertion loss of 32-45 dba
• Industrial grade silencers — insertion Toss (in versus out) 12-18 dba*.
• Residential grade silencers — insertion loss 18-25 dba*.
• Critical grade silencers — insertion loss 25-32 dba*.
• Hospital grade silencers — insertion loss 32-45 dba*
ENGINE RADIATED NOISE
Both sets do not have foam insulation on the inside of the steel enclosures. The addition
of 1.5" of foam can reduce the sound pressure levels by approximately 5 decibels.
The enclosures for both units present there own unique situations.
• 300kW — this set is suitable for foam installation. Most side panels are suitable
with one exception; the air intake for the generator set is located on the left side
(facing the owners building).
• 70kW — this enclosure is not suitable for foam installation as there are numerous
openings on all sides of the enclosure. While foam is not suitable, we believe the
major producer of noise to be the larger set.
GENERATORS FOR INDUSTRIAL
COMMERCIAL & RESIDENTIAL TO 2.8MW
DEPENDABLE
POWER SOLUTIONS
a
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PROPOSAL
Step 1: Install "Hospital" grade exhaust silencers on both units.
Install 1.5" sound attenuating foam in the 300 kW enclosure.
DISTRIBUTOR
R B GROVE, INC.
1881 NW 93 AVE
DORAL, FL 33172
305-477-0277
We would also recommend placing a landscape barrier to the East of the 300kw unit
The above proposal, within the constraints of the enclosure designs, should bring these
sets from the industrial grade close or equal to the residential grade. Approximate
completion approximately 30-45 days.
Tom Piper
R. B. Grove, Inc.
* Source; Nelson Industries
** Due to the influencing factors of the site (buildings and wall) these results can not be
specifically calculated and are approximate.
Submitted Into the public
record in connection with
item P2.1 t, on c'' yyl o i#
Priscilla A. Thompson
City Clerk
GENERATORS FOR INDUSTRIAL
COMMERCIAL & RESIDENTIAL TO 2.8MW
DEPENDABLE
POWER SOLUTIONS