Induced draft wet cooling towers

Induced draft wet cooling towers

The efficient solution

Nature’s own methodOpen-circuit cooling towers offer the most cost effective and most natural method for cooling water. That is because nature itself creates the cooling effect. In an open circuit, 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 circula- ted. The cooling water may typically be cooled below surrounding air temperature.

Multiple applicationsCooling towers may be used to great advan-tage in industries using cooling water e.g. in process cooling, cooling of conden- sers, hydraulic oil, autoclaves, eva- porators, extruders, fermenters and engine testing beds.

Cost of ownershipo kept at a minimumThe 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 Industrial Cooling also offer an efficient and low-cost solution for heat re-circulation systems, when removing surplus heat during the summer months.

Longer lifetime through roboust designVestas Industrial Cooling cooling towers are designed to provide a long and maintenance-free operation. The top, side plates and lower tank are constructed from fibreglass reinforced polyester.

Cooling with cooling towers is based on nature’s own resources – water and air

Safe, efficient and environmentally friendly

Pre fab. silencer modulesTo comply with a specific noise require- ment, the OCT cooling towers can easely be build up with silencers to reduce the noise level. Pre-fabricated moduls of silencers are simply to mount upon top, sides and bottom to reduce noise level from the fan, the air intake and water splashing.

OCT09WB cooling tower with silencer and servicebridge

1. Side silencer to reduce noise from air intake.

2. Noise reduction sections to reduce noise further in sides.

3. Top silencer to reduce noise from fan.

4. Noise reduction sections to put into the top silencer for further noise reduction.

5. End silencer to reduce noise further from both ends.

For further noise reduction, the cooling tower can be build with bottom silencers. The bottom silencer primary reduces the noise from the water.

OCT

01

02

04

05

06

09

26

35

52

M3

✔

✔

✔

✔

✔

✔

✔

M4

✔

✔

✔

✔

✔

✔

✔

✔

✔

M5

✔

✔

✔

✔

✔

✔

✔

✔

✔

M6

✔

✔

✔

✔

M7

✔

✔

✔

✔

✔

✔

M8

✔

✔

✔

✔

✔

✔

M9

✔

✔

✔

✔

✔

✔

✔

✔

✔

4

5

3

2

1

The cooling tower can be individually adapted, e.g. regarding colour, noise level or an access door for inspection and service.

All steel parts are galvanised. 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. 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 80°C. To sum it up, we produce quality.

No need to interrupt operationOn the inside, the cooling tower is divided into cells with separate fans and water connections. This allows for easy adjust-ment, 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.

Fast and easy serviceEach cell has a full size door for easy acces to allow for servicing. 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 tank is just as easy.

Plug & PlayThe 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.

Low water consumptionOnly a small amount of the circulating water needs to be replaced. This is due to evaporation during the cooling process. Low noise levelsOur 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.

Our customers often require special equip-ment and specific designs adapted to the individual cooling task.

These are examples of special designs: • Large door for servicing of cooling and

fan sections• Parts made of acid-proof steel

(AISI 316) 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• Float control of header tank• Electronic level monitoring and/or flow

control• Capacity adjustment with multi-

thermostat with change-overcycle• Cooling towers with built-on steel

reser-voir, fitted with pumps if required

The intake grill made of environmentally friendly polypropylene prevents large particles from

being sucked into the cooling towers. Also, it distributes the air correctly.

THREE BASIC MODELS FOR DIFFERENT REQUIREMENTS

Vestas Industrial Coolings cooling towers are supplied as three basic models:

Type WA: Without air-intake, for fitting above water reservoir. Particularly suitable if a large reservoir is already in place, or if special requirements apply to water reservoirs.

Type WB:Without lower tank, but with intake section. Suitable for installing directly on top of a steel or concrete tank.

Type HB: With lower tank large enough to make an extra water reservoir unnecessary.

forced polyester. All steel parts are galva-nised. The intake is manufactured frompolypropylene. In the cooling towermodels OCT06 and OCT09, a gear train isused as transmission. In other models,the motor and fan are directly coupled.The cooling liner and the drip tray aremade of polypropylene. In the standardversion, the cooling liner works with tem-perature as high as 75°C. We can supplyspecial liners able to withstand operatingtemperatures of up to 95°C.

No need to interrupt operationOn the inside, the cooling tower is divi-ded into cells with separate fans andwater connections. This allows for easyadjustment, as each fan can work inde-pendently. The amount of water to be cooled may be varied by switching off thewater supply to individual cells. This design ensures greater operating reli-ability. At the same time, service inspec-tions may take place without the entireinstallation being shut down. Instead, thecells are "switched off" one by one.

Fast and easy serviceEach cell has a "manhole" to allow forservicing. Removing a grill gives directand free access to inspection of level con-trol, the stainless filter at the outlet aswell as the overflow. Access to allow clea-ning of the lower tank is just as easy.

Very easy adaptationReady to use in an instantThe modular construction gives the advan-tage of a short set-up time, even for largecooling towers. Quite simply, the blocksare placed on top of each other and bol-ted together. The cooling towers can bepacked and delivered in a container.

Low water consumptionOnly a small amount of the circulatingwater needs to be replaced. This is due toevaporation during the cooling process.The replacement is done to prevent water

pollution.

Low noise levelsOur cooling towers are designed to produ-ce the lowest possible noise levels consi-dering the high cooling capacity.However, since noise regulations dependon various factors such as area, distanceto source of noise and time of day, we areable to lower the cooling tower noiseemission to the required level.

Specially adapted solutionsOur customers often require special equip-ment and specific designs adapted to theindividual cooling task.

These are examples of special designs:• Large door for servicing of cooling and

fan sections• Parts made of acid-proof steel (AISI

316) 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 surroun-

dings• Soundproofing according to require-

ments• Float control of header tank• Electronic level monitoring and/or flow

control• Capacity adjustment with multi-ther-

mostat with change-overcycle• Cooling towers with built-on steel reser-

voir, fitted with pumps if required

Nature’s own methodCooling towers offer the cheapest, mostefficient and most natural method forcooling water. That is because natureitself creates the cooling effect. In a coo-ling tower, water flows against an airflowdown a liner with a large surface area. Bythis direct contact between water and air,a small amount of water evaporates, the-reby cooling the remainder of the watercirculated. The cooling water may typical-ly be cooled below air temperature.

Lots of usesCooling towers may be used to greatadvantage in industries using coolingwater e.g. in process cooling, cooling ofcondensers, hydraulic oil, autoclaves, eva-porators, extruders, fermenters and enginetesting beds.

Excellent operating economyThe cooling tower has very low energyconsumption compared to other coolingmethods. Today’s increasing water and

sewage costs make recycling of coolingwater more and more cost-effective. Cooling towers from Vestas aircoil alsooffer an efficient and low-cost solution forheat re-circulation systems, when removingsurplus heat during the summer months.

Longer product life through qualityVestas aircoil cooling towers are designedto provide a long and maintenance-freeoperation. The top, side plates and lowertank are constructed from fibreglass rein-

The intake grill made of environmentally friendlypolypropylene prevents large particles from

being sucked into the cooling towers. Also, it distributes the air correctly.

2000

1800

1600

1400

1200

1000

800

600

400

200

00 5 10 15 20 25 30 35 40 45 50

12000

10000

8000

6000

4000

2000

00 50 100 150 200 250 300

6000055000 50000 45000 40000 35000 3000025000 20000 15000 10000 5000

00 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600

OCT01()-01

OCT02()-01

OCT04()-01

OCT05()-01

OCT06()-01

OCT09()-01

OCT026()-01

OCT035()-01

OCT052()-01

Flow [m3/h]

Flow [m3/h]

Flow [m3/h]

Hea

t Di

ssip

atio

n [k

W]

Hea

t Di

ssip

atio

n [k

W]

Hea

t Di

ssip

atio

n [k

W]

Natural use of water and air (pr. one cell)

DESIGN DATA: Wet Bulb Temperature Twb = 21oCMax. Inlet Temperature ti = 80oC Min. outlet Temperature = TWb + 4K

Max. Inlet Temperature ti = 80oC

Min. outlet Temperature = TWb + 4K

The cooling tower can be individually adapted, e.g. regarding colour, noise level or an access door for inspection and service.

The natural solution

FOUR BASIC MODELS FOR DIFFERENTREQUIREMENTS

Vestas aircoils cooling towers are sup-plied as four basic models:

Type WA: Without lower tank, for fitting abovewater reservoir. Particularly suitable ifa large reservoir is already in place, orif special requirements apply to waterreservoirs.

Type WB:Without lower tank, but with intakesection. Suitable for installing directlyon top of a steel or concrete tank.

Type HB: With lower tank large enough to makean extra water reservoir unnecessary.

12000

1000

8000

6000

4000

2000

0

0 50 100 150 200 250 300

Hea

t Di

ssip

atio

n [k

W]

OKT04()-01

OKT05()-01

OKT026()-01

OKT06()-01

OKT035()-01

OKT09()-01

OKT052()-01

Flow [m3/h]

2000

1800

1600

1400

1200

1000

800

600

400

200

0

60000

55000

50000

45000

40000

35000

30000

25000

20000

15000

10000

5000

0

0

0

5

100

10

200

15

300

20

400

25

500

30

600

35

700

40

800

45

900 1000 1100 1200 1300 1400 1500

50

1600

Hea

t Di

ssip

atio

n [k

W]

Hea

t Di

ssip

atio

n [k

W]

Natural use of water and air (pr. one cell)OKT01()-01

OKT02()-01

Max. Inlet Temperature ti = 80°C

Min. Inlet Temperature ti = TWb + 4K

Flow [m3/h]

Flow [m3/h]

DESIGN DATA: Wet Bulb Temperature Twb = Max. Inlet Temperature ti = Min. outlet Temperature =

21°C80°C

TWb + 4K

Vestas Industrial Cooling, Smed Hansens vej 13, DK-6940 Lem St. Denmark

Tel.: +45 9734 1800 [email protected]

Cooling towers for all your requirementsType description of Vic standard OCT

Type 1A 2A 3A Placement of outlet to bee agreed 4A Placement of outlet to bee agreed

1B 2B 3B 4B Ect.

Inlet

Outlet

Servicedoor

Air intake

1C 2C 4C 6C Placement of outlet to bee agreed Ect.

2D 4D 6D 8D Ect.

Type description of Vic standard OCT

Type 1E 2E 3E 4E Ect.

1F 2F 3F Placement of outlet to bee agreed 4F Placement of outlet to bee agreed

1G 2G 3G Placement of outlet to bee agreed Ect.

Important : All other types : OCT0x-Spec-x

Placement of inlet, outlet and servicedoor can be re-placed as options!

IH: 2000 mm OCT09 V V V V

V

V V

Air intake : 2-Sides Long



IH: 2000 mm OCT09 V V V

VIH: 2000 mm OCT09

V V V V

V V

V

Air intake : 1-Side Long




V V V V

V

V V V

V V V

V

V

V

V

IH: 1500 mm OCT05/09

V VIH: 1000 mm OCT01-09

V

V V V VV

IH: 1500 mm OCT05/09 V V VVV V V VV

VVV

V VV

VV

VV

VV

V V

V

V

V

V

V

VIH: 2000 mm

OCT09

V

V

V V

V

V

V

V

V

Air intake : 1-Side Short






Air intake : 2-Sides Short














Selected references:

Choosing the right cooling tower. Vestas Industrial Cooling supplies cooling towers from 10-260 m3/hr cooling water per cell fan. This sketch shows the principal dimensions in mm of the different cooling tower ranges

Certification body address: 5th Floor, 66 Prescot Street, London, E1 8HG, United Kingdom Local Office: Oldenborggade 25-31, 7000 Fredericia, Denmark

Further clarifications regarding the scope of this certificate and the applicability of the Management System requirements may be obtained by consulting the organization. To check this certificate validity, please call (+45) 77 311 000. 1/2

Vestas Aircoil A/S

Smed Hansens Vej 13, 6940 Lem St., Denmark

Additional site details are listed in the appendix to this certificate.

Bureau Veritas Certification Holding SAS – UK Branch certifies that the

Management System of the above organization has been audited and found to be in accordance with the requirements of the management system

standards detailed below.

Standard

ISO 9001:2015 Scope of certification

Consultancy, Development, Construction, Production, Sales and Service of: Charge Air Coolers, Cooling Towers, Dry Coolers

together with variations hereof, including Spare Parts.

Original cycle start date: 03 September 2007 Expiry date of previous cycle: NA Certification/Recertification Audit date: NA Certification/Recertification cycle start date: 19 June 2019

Subject to the continued satisfactory operation of the organization’s Management System, this certificate expires on: 18 June 2022 Certificate No.: DK011312 Version: 1 Revision date: 11 June 2019

Documents

Induced draft wet cooling towers