Introduction
A high-volume low-speed (HVLS) fan is a type
of mechanical fan that is more than 2.1 m in diameter. These fans are generally
ceiling fans while some are pole mounted. HVLS fans are best to spread large amounts
of air at low rotational speed and move slowly hence named "high volume,
low speed."
Mostly HVLS classified into two types that are
industrial and commercial. In industrial applications, air conditioning is
often cost impractical. Fans that are installed in spaces like warehouses,
hangers, barns and distribution centres can stop heat stress, increase worker
ease and the output of both workers and livestock. HVLS fans are helped in
commercial spaces, where air conditioning is more common, but increased air
movement from ceiling fans can cost-effectively augment occupant comfort or
prevent stratification. But commercial applications include shopping malls,
office buildings, churches, fitness centres, airport terminal buildings, and
schools.
Working of HVLS Fans
HVLS fans work on that cool moving air breaks
up the moisture-saturated boundary layer encompassing the body and accelerates
evaporation to produce a cooling result. Ceiling fans manufacture a column of
air as they turn. This column of air moves down and out on the ground. That’s
also called a horizontal floor jet, this deep wall of horizontal moving air is
comparative to the diameter of a fan, and to a lesser degree, the speed of a
fan. Once the floor jet reaches its prospective, it migrates outward until it
meets a side wall or other vertical surface.
In ideal conditions, 2.4 m diameter fan
produces a floor jet of air approximately 36 inches (910 mm) deep. A 7.3 m
diameter fan produces a floor jet 108 inches (2,700 mm) deep, tall enough to
engulf a human standing on the floor or a cow, its initial development
purpose.
Commercial HVLS fans differ from residential
ceiling fans by diameter, rotational speed, and also performance. Whereas some
fans use contemporary blades to move air, other methods are being used to make
it more proficient such as using airfoils.
Benefits of HVLS
·
HVLS fans use comparatively little energy and
deliver a gentle, quiet breeze. However, the smaller floor-mounted fans can
help in limited areas and they have high speed so their high wind speed can
cause problems; noisy operating levels introduce another stress-inducing factor
and also cause to consume high amounts of electricity.
·
Technically advanced HVLS fans are best to
move the air of large areas and can move large volumes of air over an area up
to 22,000 square feet. An HVLS fan can cover the large area so it may replace
as many as 20-floor fans, so it can lower the chances of an accident as reduce
clutter on the ground.
·
HVLS fans also support air-conditioning systems
work more proficiently, allowing them to be run at a lower set point. So it can
help by mixing the air.
·
Air movement can have an important influence
on human thermal relaxation. Wind chill in cold conditions is considered
unfavourable, but air movement in neutral to warm surroundings is considered
helpful. This is as a result of unremarkably beneath conditions with air
temperatures higher than concerning 74 °F, the body has to lose heat to take
care of a continuing internal temperature.
·
As air conditioners, which cool rooms and fans
cool people. Ceiling fans raise airspeed at the occupant level, which helps
more efficient heat rejection, cooling the occupant, somewhat space.
·
It can allow the mixing of air in the space
while reducing both heat loss through the building roof and walls and building
energy consumption.
Applications for HVLS Fans
Industrial use: HVLS fans work
well that way these are use industries. HVLS fans maintain airflow in the
warehouse and manufacturing floor and also help in temperature control during
company luncheons.
HVLS fans are best for aviation,
manufacturing, auto service and also shop environments. However HVAC systems in
these applications are simply not cost, effective or even feasible, HVLS fans
make a great alternative to maintaining worker comfort and output.
Commercial use: HVLS fans can
prove useful for commercial uses. Installation of HVLS fans cut down on heat
and cooling costs as the increased airflow allows both to be more efficient in
educational institutes. Also, sporting venues, medical offices, shopping malls
and places of worship have discovered the same benefits and savings.
Agriculture use: HVLS fans the technology was used at a dairy farm, farmers use them for cooler cows produced
more milk. After the successful establishment of these fans in dairy forms,
HVLS fan technology moved into other agricultural operations including equine,
poultry, swine and fair exhibitions.
Besides keeping livestock cool and easy, the
fans also control moisture as pests attract to moistures and cause the
diseases. So these are best to reducing or even eradicating moisture in
livestock settings decrease the chance of infections as mastitis in dairy
cattle.
Industrial Ceiling Fans for Warehouses
In the warehouse, fans are used for different
purposes many times like cooling, refreshment, heating, etc. These fans are
small size, not a large size. Now a day large industrial ceiling fans are
utilized that are much better than others and cover the large area. As
warehouse large fan ranges in size from 9 to 24 feet in diameter and can cover
the large area up to 1800㎡.
So the HVLS fans are used for many reasons as
they can decrease condensation, circulate the airflow incomplete space, also
warm spaces in winter by recommended reverse rotation, Save money on cooling
and heating costs and HVAC equipment repairs, cool the area in the summer with
up to 30 per cent greater coverage, help in the reduction of airborne pollutants and
also protect your equipment and inventory from humidity.
Benefits of HVLS Fans in Warehouses
·
Air conditioners used for cooling but blow it
cold air from a single point, but they don’t spread the cold air in the
complete space. So large commercial high-volume, low-speed fans do this.
Installation of HVLS fans results in cooler air, lower power bills and workers
feel comfort and result in increasing their output.
·
Some warehouses don't seem to be occupied
enough to justify air con. So there, heat can form dangerous levels for
workers. Even when the air conditioner is not used then large industrial
ceiling fans keep more people cooler in warehouses by producing a fresh breeze
and eliminating stagnant air.
According to some studies,
It can improve employee comfort results in greater employee output by up to 2%
per degree when interior temperatures are above 77 degrees. Improving your fan the system can save your money and time, and also prevent excessive respiratory
problems as well.
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