Cooling Towers and Dry Coolers
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Cooling Towers and Dry Coolers
ViFlow now offers a complete product-range in the field of heat exchanging and cooling.
ViFlow has signed an agreement with the company Vestas Industrial Cooling which gives ViFlow the
exclusive right to sell Vestas Industrial Cooling products in Finland. The agreement broadens
ViFlow's product range with cooling towers and dry coolers (also called radiator coolers) and provides
a broad capability on technical deliveries.
These devices are suitable for a broad operating range from small units in the HVAC sector up to
large-scale industrial units. The largest module type area has been 144 m2. (width x length)
Release the powers of nature
Cooling with cooling towers and dry coolers is based on nature´s own resources water and
air.
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Cooling Towers
Natures own method
Excellent operating economy
Cooling towers offer the cheapest, most
efficient and most natural method for cooling
water. That is because nature itself creates the
cooling effect. In a cooling tower, water flows
against an airflow down a liner with a large
surface area. By this direct contact between
water and air, a small amount of water
evaporates, thereby cooling the remainder of
the water circulated. The cooling water may
typically be cooled below air temperature.
The cooling tower has very low energy
consumption compared to other cooling
methods. Today ́s increasing water and sewage
costs make recycling of cooling water more and
more cost-effective. Cooling towers from
Vestas aircoil also offer an efficient and lowcost solution for heat re-circulation systems,
when removing surplus heat during the summer
months.
Lots of Uses
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closed cooling water circulation
cooling of condensers
hydraulic oil
autoclaves
evaporators
extruders
fermenters
engine testing beds
Longer product life through quality
Vestas aircoil cooling towers are designed to
provide a long lifespan with little maintenance.
The top, side plates and lower tank are
constructed from fibreglass reinforced
polyester. All steel parts are galvanised or
stainless steel. The intake is manufactured from
polypropylene. In the cooling tower models
OCT06 and OCT09, a gear train is used as
transmission. In other models, the motor and
fan are directly coupled. The cooling liner and
the drip tray are made of polypropylene. This
design allows for a drip loss as low as 0.05% of
circulated water. In the standard version, the
cooling liner works with temperature as high as
75°C. We can supply special liners able to
withstand operating temperatures of up to
95°C.
Low water consumption
Only a small amount of the circulating water
needs to be replaced. This is due to
evaporation during the cooling process. The
replacement is done to prevent water pollution.
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Low noise levels
Fast and easy service
Our cooling towers are designed to produce
the lowest possible noise levels considering the
high cooling capacity. However, since noise
regulations depend on various factors such as
area, distance to source of noise and time of
day, we are able to lower the cooling tower
noise emission to the required level.
Each cell has a service door to allow
maintenance and inspection. Removing a grill
gives direct and free access to inspection of
level control, the stainless filter at the outlet as
well as the overflow. Access to allow cleaning
of the lower section is just as easy.
No need to interrupt operation
On the inside, the cooling tower is divided into
cells with separate fans and water connections.
This allows for easy adjustment, as each fan
can work independently. The amount of water
to be cooled may be varied by switching off the
water supply to individual cells. This design
ensures greater operating reliability. At the
same time, service inspections may take place
without the entire installation being shut down.
Instead, the cells are switched off one by one.
Ready to use in an instant
The modular construction gives the advantage
of a short set-up time, even for large cooling
towers. Quite simply, the blocks are placed on
top of each other and bolted together. The
cooling towers can be packed and delivered in
a container.
Examples of special designs
Our customers often require special equipment
and specific designs adapted to the individual
cooling task.
• Large door for servicing of cooling and fan
sections
• Parts made of acid-proof steel (1.4404) to
withstand contact with liquids
• Single-sided intake for connection to air
ducts
• Intake with filter for installation in areas with
dust, leaves, etc.
• Specific colours matched to surroundings
• Soundproofing according to requirements
• Electronic level monitoring and/or flow control
• Cooling towers with built-on steel reservoir
(also 1.4404), fitted with pumps if required.
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Standard size program
Vestas aircoil A/S supplies cooling towers from 1MW to 120 MW cooling capacity. We can offer the
right cooling tower size depending on the cooling capacity, sound requirements and other
specifications. Cooling towers can also be delivered with water basin.
OCT01-OCT02 - small size
OCT04-OCT09 - medium size
OCT26- OCT144 - large size
OCT01 (1050X1050)
the smallest cooling tower in
the series.
It is a low cost tower, with the
air-inlet as a part of the
cooling section.
To gain access to
replacement of spareparts
inside the tower, it is
equipped with servicedoor or
with an inspection hatch.
OCT04 (1950x1950)
is a quadratic cooling tower
It is very flexible when
combined in combination
with other cells (placement of
air-intake section).
To gain access to
replacement of spare parts
inside the towers the cooling
tower is equipped with a
service door .
OCT02HBL (1350x1350)
a medium cooling tower in
the small series. The low
model is where the air-inlet is
built-in the cooling-section.
This make the tower
less expensive but still keeps
the high preformance.
All cooling towers can be
built together in rows, to
increase the cooling capasity.
OCT06 (2550x2550)
is a quadratic cooling tower.
It is very flexible when
combined in combination
with other cells (placement of
air-intake section).
To prevent the system to be
polluted with dust or leafs,
the cooling towers can easily
be constructed with inlets
and filters.
OCT02HBH (1350x1350)
a large cooling tower in the
small series. The high model
is made with a seperate inlet
section.
It´s produced with up to four
layers of fills.
This makes the tower a little
higher but with a higher
capasity.
OCT05 (2550x1950)
OCT09 (3750x2559)
is a rectangular cooling tower.
In all towers the in-and outlet
can be placed so it matches
the specific situation at site.
It is very flexible when
combined in combination
with other cells (placement of
air-intake section).
OCT26 (5300x5300)
OCT52 (7300x7300)
OCT144 (12000x12000
In all towers the in- and outlet can be placed flexible to match most
situations at site.
It is very flexible when combined in combination with other cells.
(placement of air-intake section).
This cooling tower is assembled at site whereas all smaller towers
can be shipped as a complete unit or divided in sections easy to
be assembled.
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Cooling Tower References
UPM Kymmene Wisaforest Pietarsaari
Cooling Tower OCT09-HB05-5-120
including a silencer seen in the picture
Ruukki Raahe
Cooling Tower OCT52-WB03-3-120
For the same plant also a Cooling Tower
OCT04-HB-01-1-090 has been delivered
Cooling Tower
Hede Nielsen
Cooling Tower
Alphalydd
Cooling Tower
Kalundborg
Two units of Cooling Tower
OCT26WB04
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Dry coolers & Radiator coolers - the most natural solution
Air cooling of liquids
Dry coolers are a natural supplement to our programme of Wacond Standard and Module cooling
towers. In a cooling tower the water is in direct contact with the air. Cooling of the water happens by
evaporation. It is the wet bulb temperature which is the lower limit and in practice the water can be
cooled down under the ambient air temperature.
In a dry cooler there is a finned tube wall between water and air and cooling of the water is made by
heating up the air. In this case the air temperature is the lower cooling limit.
Advantages by the air cooled system
Effective high-quality radiatior coolers
no consumption of water
no consumption of chemicals
a minimum of service
easy to prevent frost by using antifreezer
liquids
• no evaporation clouds at low air temperature
The dry coolers of Vestas aircoil are based on
many years of experience and a well tested
calculation programme. The production is
controlled according to ISO 9002.
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When to use dry-coolers
Dry coolers are usable in all the plants where
water is used in a process to remove the
excess heat and where the temperature range
between the water and the air is adequate. The
temperature range should be at least 5 °C. It is
recommandable that the range is 8 - 10 °C
above the design ambient air temperature.
Often it can be an economical advantage to
use dry coolers for cooling/chilling during the
cold period of the year and another type of
cooling system during the warm period/
summer.
Dry coolers (radiator coolers) are used in power
plants, diesel- or gas generator plants, waste
treatment plants, biogas plants, but also in
other segments as for instance plastic
production, hydraulic processes, glassworks,
gardenings, the machine industry, and the
wood industry.
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Low energy comsumption and low noise
level.
The decisive factor when talking about low
operation costs is a low energy comsumption.
We have focused a lot on the fan arrangement:
• The inlet profile of the fan casing is shaped as
a bell in order to reduce noise and reduce
turbulence at the fan inlet to a minimum.
• The fan casing is fabricated in galvanized
steel or aluminium.
• The fan blades are fabricated in aluminium or
PAG - polyamide reinforced with glass fibres.
• Low energy motors are applied.
• Temperature controlling systems, which
minimizes the working hours, are supplied as
accessories
Materials for optimal dry cooling
Tubes and fins as well as frame and headers
can be supplied in many materials.
Tubes: Copper, copper/nickel, tin-plated copper,
aluminium, stainless steel and acid-proof
stainless steel, titanium
Fins:
Aluminium, copper, stainless steel, acid-proof
stainless steel, aluminium/magnesium, prepainted aluminium.
Frames:
Aluzink, galvanized steel, aluminium, copper,
stainless steel and acid-proof stainless steel.
Headers:
Copper, copper/nickel, aluminium, stainless
steel, acid-proof stainless steel and carbon
steel.
Pressure testing:
The coil is pressure tested up to minimum 16
Bar with dry pressure air.
Accessories:
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Safety cut-outs switch at each motor
Common extra header
On/off control
Voltage regulation controlled by the water
temperature
Frequency regulation controlled by the water
temperature
Motor includes thermal cut-out / termistor
Single-phase motor.
Surface treatment of lacquer
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Dry Cooler References
Dry Cooler
Fasan
Dry Cooler
Nestved
Dry Cooler in a Power Plant
Fasan
Dry Cooler
Fasan
Dry Cooler
Dry Cooler
Wärtsilä is one of the biggest Finnish customers.
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi
Quality
Quality means safety. Each unit is construction and pressure tested before leaving the factory. ViFlow Finland helps the customer with the maintenance and spare parts of all the products that we
sell. Our service does not end with the delivery of the product.
Service & Repair
Certificates
ViFlow offers a wide range of services
including:
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Assembling
Problem solving / advise
Service and maintenance
Repair
Spare parts
ViFlow Finland Oy is part of ViFlow Group, one of the leading suppliers of heat exchangers and pressure vessels in the
Nordic Region.
Beside of the cooling towers and dry coolers introduced in this leaflet we also have gasketed and brazed plate heat
exchangers, shell and tube heat exchangers, totally laserwelded plate and shell heat exchangers, tanks, reactors and other
production equipment in our product range. Contact us for more information.
ViFlow Finland Oy • Kauppakartanontie 7 A 1 • FI-00930 Helsinki • tel. +358 40 178 0920 • fax +358 9 4789 2800
viflow@viflow.fi • www.viflow.fi