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Introducing the SKYPLUME Generation II
Patent Pending in the United States, Canada &
Europe
Model – SKYPLUME G2
Entrainment stacks need
to work in the outdoor environment in which they are installed. As
crosswinds accelerate, it is important for public safety that stacks
maintain designed dilution ratios. Plasticair has now fully addressed
dilution and crosswinds.
Our originally designed
uni-passage SKYPLUME has wind deflection characteristics inherent to the
design on two sides. Our further developed SKYPLUME G2, has greatly
enhanced this design feature by adding wind deflection panels. This is
very important and ensures that dilution ratios are constant up to
41 MPH with a nozzle velocity of two times crosswind speed.
Wait! we’ve got more good news:
Our nozzle is a
constant velocity nozzle, meaning that the area is constant from inlet
to outlet which translates to virtually no pressure loss. Although this
is not a factor dealing with entrainment, it is very beneficial to the
whole system as it will result in lower electrical horse power
requirements and lower sound output, all this while maintaining a
minimum 200% dilution ratio up to 41 MPH.
The SKYPLUME G2 is
constructed of solid UV stabilized FRP and can structurally withstand
winds up to 150 MPH. Inlets are round and can be fitted with a
rectangular transition to fit any fan. Plasticair is proud to offer
this product as a unit by itself for component system integration. Also, Plasticair is well experienced and an industry Leader in providing full
manifold multi or single fan systems with AMCA Air and Sound Certified
Fans.
SKYPLUME G2 configurations are as follows:
Stacks supplied
independent and constructed of FRP. Also available for special order in
coated steel or 316 ss
SWSI swing-out easy
access maintenance friendly arrangements 1,4,9. Fan constructed of
coated steel and SKYPLUME G2 constructed of FRP.
SWSI centrifugal
arrangements 1,4,8,9,10. Fan and SKYPLUME G2 constructed of FRP.
SWSI centrifugal
arrangements 1,4,8,9,10. Fan constructed of coated steel, SKYPLUME G2
constructed of FRP.
Inline mixed flow
arrangements 9. Fan and SKYPLUME G2 constructed of FRP.
Inline mixed flow
arrangements 9. Fan constructed of coated steel and SKYPLUME G2
constructed of FRP.
Testing Methodology
"Plasticair
is taking a TRANSPARENCY approach into High Plume Dilution
Testing".
Plasticair has taken
the leadership roll regarding the testing of high plume dilution stacks.
We have included our testing methodology and results which were
conducted and designed by one of North Americas leading
Fluid Dynamic
Consulting Engineering Firms: RWDI ( Rowan Williams Davies & Irwin
Inc ) in
order that Engineers
and Owners can evaluate the thoroughness of Plasticair methods and
really understand what they are specifying, and more importantly, they
can see reliable scientific proof of the induction and entrainment
characteristics of the product. For further information please review
our PDF file attached:
We urge that the
Engineering Community specify proper testing for this very important
aspect to HVAC design. These stacks are applied to exhaust air streams
that contain dangerous and sometimes contiguous molecules that must be
properly diluted and evacuated away from the public. Engineers
specifying these types of systems should consider manufacturers that
have tested their stacks as thoroughly as the Transparency HPD
test and also specifying manufacturers that provide equipment
with the AMCA Air and Sound Seal when dealing with laboratory exhaust
and public safety.
High
Plume Dilution Nozzle Suggested Specification
The fan discharge will
be fitted with an FRP exit nozzle and attached conical windband.
Material of construction will be UV stabilized solid FRP and the
manufacturer will provide a 20 year warranty against equipment failure
due to rust. The nozzle windband assembly will be structurally designed
to withstand 150 MPH winds. Design calculations will be presented to the
specifying Engineer for review and approval.
The nozzle assembly
will be designed to induce outside air by a venturi effect and also
entrain air to provide dilution ratios that are not less than 200%
throughout crosswind speeds up to 41 MPH. For safety reasons, the stack
will also be designed and thoroughly tested to resist downwash caused by
crosswind pressure/vortices up to 41 MPH as a design standard. Stack design
shall be stable enough to accommodate downwash protection against
any wind speed using a nozzle velocity that is two times cross wind
speed. Stacks must undergo
physical wind tunnel testing to the following criteria:
1) Testing
to confirm dilution results from crosswind effect from any position 360
degrees around the stack and @ three speeds up to 20 MPH.
2)
Chemical
concentration testing with a minimum of 65 pito tube sampling points
evenly distributed in a radial direction located level with the stacks
physical highest point. Parts per million input vs. parts per million
output will be used to determine dilution ratio. For large sizes, a
minimum of 79 pito tube sampling points per square foot are required.
3)
Tested
with at least 2 pito tube sampling points located at base of windband
for monitoring down wash against crosswinds up to 20 MPH. At least one
pito tube will be placed down stream of the crosswind.
4)
Corresponding velocity testing with a minimum of 65 pito tube sampling
points.
5)
All wind
tunnel testing completed as listed above, stamped by a reputable third
party Fluid Dynamics Consulting Engineering Firm.
Concludes
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