230 / 416
JETVENT CAR PARK IMPULSE VENTILATION
© FANTECH
2016
JETVENT CAR PARK IMPULSE VENTILATION
F-2
F
INTRODUCTION
The ventilation of enclosed or semi-enclosed
spaces where vehicles operate is essential for
removing exhaust fumes containing harmful
pollutants. Some of these pollutants include
Carbon Monoxide (CO), Nitrous Oxides (NO
X
),
Sulphur Dioxide (SO
2
) and heavy metal
compounds that accumulate in spaces such as
commercial and residential car parks, loading
bays and drive through "take away" facilities.
The most significant development in ventilation
design for these spaces has been the
introduction of Impulse fan systems. It is an
innovative alternative to traditional distribution
ductwork systems and provides a number of
significant benefits. The system provides
constant air movement ensuring harmful
pollutants do not gather in dead areas.
How it works
An Impulse Ventilation System is based on a number of small,
strategically located high velocity JetVent fans that replace the
air distribution ductwork in enclosed/semi-enclosed spaces.
They can also be used to increase cross-flow ventilation in large
open sided car parks.
JetVent Fans operate on well proven longitudinal tunnel
ventilation principles. The fans produce a high velocity jet of air,
in turn moving a larger quantity of air surrounding the fan
through a process known as entrainment. The JetVent Impulse
fans are positioned within the space to mix the air and direct it
towards the main extraction fan intake points.
The main extract fans are sized to provide the required air flow
rates for the size and design of the car park. However given the
reduction or complete elimination of ducting in an Impulse
Ventilation design, system resistance is reduced and therefore
smaller, lower power extract fans than those required in a
ducted system are possible. These typically consume less
energy and take up less space within the car park.
The amount of air entrained by a single JetVent fan increases
with the velocity and the quantity of air being discharged by the
fan. These characteristics directly relate to the thrust rating of
the fan, which is measured in Newtons (N).
JetVent impulse ventilation systems can be designed and
controlled to accommodate any building code requirements as
well as fire and smoke control parameters to satisfy the relevant
building fire regulations and authorities. The JetVent Impulse
ventilation system is being installed to increase the efficiency
and amenity of car parks throughout Australia, New Zealand
and South East Asia.
Industry award winner
The JetVent Digital EC and its demand control system
was presented with the 2012 ARBS Industry Product
Excellence Award in recognition of it's simplicity, energy
efficiency and its ability to adapt to most car parks. The
award was also confirmation of Fantech's commitment to
innovation, continuous improvement and its drive to
develop innovative cost effective solutions.
Advantages
O
Greater energy efficiency. A JetVent System results in
less resistance through the supply and exhaust air
mechanical systems.
O
Can potentially add additional car park spaces because
of smaller or fewer ventilation risers and plant rooms.
O
Provides a more open, uncluttered space because of the
reduction or elimination of the air distribution ductwork.
O
Ability to multi zone the space can reduce power
consumption by the fans operating on a demand basis.
O
Helps to lower floor-to-ceiling heights which can reduce
excavation and construction costs. This is due to JetVent
fans having a small vertical profile and their mounting
position being very flexible.
Scan the QR Code
to view more
information online.
Designing the system
An impulse ventilation system can be tailored to suit virtually any
car park design and size. The system layout will first need to be
identified followed by the creation of an initial design.
A Computational Fluid Dynamics (CFD) analysis is often
required to prove and further refine the impulse ventilation
system design. Fantech is able to facilitate a CFD and assist
with the information required to perform the analysis.
For further information on how to create an initial impulse
ventilation system design, contact your Fantech representative
about the “JetVent Practical Guide for Selection & Application"
or refer to the Fantech website.