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Permanently Good Cooling
TOPAZ
brochure TP_01.en
Y E A RJA H R E
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adiabatic cooler
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TOPAZ
adiabatc cooler
Outlet air
Axial fan
motor
Water Distribution Channel
Waterinlet
finned Heat exchanger Dry
Humidifying Pad
inletair
inletair
Water Outlet
Water recirculation Pump
Water basin
Benefits
No water treatment required
Nowatersprayinairflow
elimination of legionella risk
Keine Verschmutzung und Ablagerungen im Wärmetauscher
euroveNTcertifiedtubecoils
Very low water consumption
Permanentmagnetmotors(efficiencybetterie3)
Low operating costs
easy maintenance due to vertical H shape of the tube coils : full access through the central door
P rod uc t D es c ription_TOPAZ
The TOPAZ adiabatic cooler is a heat exchanger; calories / heat are rejected to atmosphere.
The TOPAZ adiabatic cooler is a combination of dry cooler with an adiabatic precooling section: this precooling section lowers ambient air temperature by evaporating water which is
passed over the cooling / humidifying pads, specially designed for this purpose. The fluid is
cooled in the dry tube coil by ambient air flow. The ambient air is drawn through the coils by
fans mounted centrally on the top of the Cooler; the humidifying pads located in front of the
coils are dry. The fan speed is controlled by an inverter depending on heat load to maintain
the fluid outlet temperature. The warm air is then evacuated upwards. When cooling in dry
mode is not effective and the ambient temperature reaches a predetermined set point, the
pads are saturated with water from the sump.
The ambient air is cooled by evaporation when passing through the pads.This precooled air
then passes through the tube coils and cools the fluid. The water which has not been evaporated on the pads is collected in a collector and then flows to sump. The collected water is recirculated with the make-up water from the sump to be re-distributed over the pads. The water saving is significant and does not require water treatment, it is without risk of Legionella.
The TOPAZ range is robust due to its design, choice of materials and vortex sintering. The
device is specially developed for both urban and industrial environments.
Number Of
fANs
2
3
4
5
motor fans (1500
min -1)
electric motor power
consumption
Technical Specifications
WeTCooLiNg*
WaTerreCirCuLaTioN
PumP
airvoLuMe
(approximate)
kW
kW
m3/ h
T2B
410
1x0,75
100.000
9,7
2x6,5
T3a
520
2x0,75
150.000
14,5
3x6,5
T3B
600
2x0,75
150.000
14,5
3x6,5
T4A
700
2x0,75
200.000
19,4
4x6,5
mODeL
axiaLfaNø 140
kW
kW
T4b
810
2x0,75
200.000
19,4
4x6,5
T5b
1030
2x0,75
250.000
24,2
5x6,5
*Nominalcoolingcapacity(watercoolingfrom37°Cto32°Catanambientwetbulbtemperatureof21°C)
CoverpictureshowsModelT2B
04
00 mm
dB(a)
WaTerCoNNeCTioNs
DN
m3/ h
Zoll(mm)
diMeNsioNs
Zoll(mm)
Zoll(mm)
mm
mm
mm
operating weight
dry weight
height
width
frame support dimensionsL2
overall dimensions L1
overflow connection
drain connection
make up water
connection (threaded
male)
make up water flow
inlet/outlet water
connection
sound level in 15 m
Tec h n i c al i n form at i on_ToPaZ
WeighTs
mm
kg
kg
57
65
0,5
1"(26x34)
1½"(40x49)
1½“(40x49)
3665
3265
2485
2804
2240
3250
58
100
0,7
1“(26x34)
1½“(40x49)
1½“(40x49)
5275
4875
2485
2804
3160
4200
58
100
0,7
1“(26x34)
1½“(40x49)
1½“(40x49)
5275
4875
2485
2804
3250
4395
59
100
1
1“(26x34)
1½“(40x49)
1½“(40x49)
6890
6490
2485
2804
4080
5100
59
100
1
1“(26x34)
1½“(40x49)
1½“(40x49)
6890
6490
2485
2804
4200
5360
61
100
1,2
1“(26x34)
1½“(40x49)
1½“(40x49)
8500
8100
2485
2804
5000
6050
DRAWING AND DIMENSIONS
overflow valve
drain connection
water connection
05
Tube Coils The coil performance is certified by EUROVENT. in standard configuration, the coils are made of
copperandthealuminiumfinsareepoxycoated.Tubesareexpandedthroughthefinstoensurebothoptimized
mechanicalresistanceandthermalconductivity.Thetubethicknessis0.35mm,andthefinpitchis2.1mm.The
largefinpitchoffersgoodresistanceagainstscalingoftheexchangesurfaces.
Thecoilsarehydraulicallytestedto22Barasstandard.
Pre-cooling by Evaporation
The evaporation section is used to precool the ambient inlet air.
The cooling / humidifying media covers the whole air inlet section,
on both sides of the unit. The design and the choice of materials
haveproventogivebestefficiencyandlongoperatinglife,bothin
urban and industrial environments.
The cooling / humidifying pads are made of special cellulose,
chemically treated to avoid moisture and to improve water absorbing characteristics.
selected to simplify maintenance, the media pads are not directional. it is easy to disassemble the cooling / humidifying pads,
without tools or special access requirements.
Theprecoolingcircuitisactivatedwhenthefluidoutlettemperature is higher than the set point. This wet / dry set point is around
23 °C in a continental climate, for a fluid outlet temperature of
27°C.
Winter Operation Theprimarycycleisfilledwitha35%ethyleneglycolmixturethefreezingpointofwhichis
-21,8°C(-7,24°f).attemperatures<+12°C(53,6°f)thehumidificationsystemisemptiedandthereplenishment valve automatically closed.
Water Distribution
The water distribution channels with long-term protection against
corrosion with vortex sintering are entirely enclosed on the top and
do not require any pressure to operate. They are located outside
the airflow and distribute water evenly onto the pads, in full safety. Their “u” shape makes internal cleaning very easy, without any
tools, handles are provided to aid removal.
The water basin with vortex sintering collect the water which has
not been evaporated. The water is sent to the sump for recirculation by means of a pump.
Collected water is re-circulated without any bacteriological risk
(temperature is below the level for bacterial growth): The water
consumptionisdividedbyafactorof3.
06
The system includes a drain valve that automatically opens to dump the water from
the sump if the cooling section has been
usedduringtheprevious24hours.
A drying cycle is incorporated which will
drain the sump completely and will dry the
pads and other items which come into contact with water by running the fans at high
speed. This function minimises bacteria
growth potential and prolongs pad life.
The water recirculating system reduces
water consumption by approx. 70%.
Tec h n i c al I n form at i on_TOPAZ
Motor fan sets
The motor fan sets draw the air through the pads, then
through the tube coils..
A permanent-magnet motor, specially developed to minimizepowerconsumption(overie3efficiency)isdirectly
coupled to a low speed axial fan. This combination offers
bothpowerefficiencyandoptimizedsoundlevel.Themotor fan coupling is direct and requires no maintenance.
The blades are made of aluminum, and the hub is made
of steel, the blade angle adjustment is made stand still.
As an option, sound attenuators can be provided to significantlyreducethesoundlevels.
Permanent magnet motors
The TOPAZ adiabatic cooler is a cutting edge
technology and shows exceptional performance
(efficiencyoverie3).TheyareiP55insulation
class,380/400v.
This efficiency places the ToPaZ range at the
peakofenergyefficiency,especiallyasthemotors are always controlled by the inverter.
The magnets create their own magnetic field
without induced power. The motor runs cooler,
is smaller and lighter and has maintenance and
handling benefits. also, a lower temperature
means long-lasting bearings (grease nipples directlyonthemotor),andinsulationmaterials.
These motors have a low carbon footprint =>
power savings.
Efficiency Comparison
efficiency
%
98
96
Permanent
magnet motor
94
ie3Motor
92
ie2Motor
90
88
86
84
Load%
0
20
40
60
80
Values for indication only
07
Control panel with automaton The TOPAZ range is totally
« Plug and Play »: the siemens automaton equipped with hMi
(human Machine interaction) as a standard, allows frequency drive and precooling operation controls without opening
the electrical panel: it has an external screen for full safe
maintenance.
so it can be operated safely, without the use of specifically
trained operators.
Frequenz Steuerung Modelation
installed as a standard across the
whole range, there is one frequency
drive per motor. Permanent magnet
motor directly coupled to axial fan and
regulated by the frequency drive offers
thebestefficiency.
Functions of The Automaton
integralcontrolofthetimechip
memory saving in case of power failure
Liquid crystal display showing multiple lines of main parameters and alarms
interfacefortheuserinordertoreadjustsettings
Analogue outlet for fan speed control with frequency drive, installed as standard
Digital monitoring including: pumps, drain valve, water / sump make up valve, drai and dry mode
controls
security password to protect all set data
ethernet communication language is included as a standard, further communication modes are optional:
modbus, LON, bacnet.
Intelligent access. The TOPAZ adiabatic cooler has been designed with three main goals: thermal performance, hygiene and
ease of maintenance.
Therefore, the following technical features are incorporated: “H”
orientation of the tube coils offers an ideal geometry for complete
accesstothemotors,fansandtheinternalfinnedtubecoils,over
the whole height of the cooler.
TOPAZ is equipped with an automated roller shutter door without
doorstep. The motor/fan set is removable and can be extracted
from inside for maintenance. Accordingly, lifting equipment*, safety
guards or walkways are not necessary to carry out maintenance.
*As an option; a hydraulic lifting table allows removal of the motor/
fan set in complete safety, without means of other lifting equipment.
Also, easy handling of the humidifying pads is possible, without any
lifting/ handling tools.
08
Tec h n i c al I n form at i on_TOPAZ
Frame and Panelling The TOPAZ range of products is
robust and durable, due to its design and the choice of
materials with corrosion-resistant coating in vortex sintering.ithasbeendevelopedfortheairconditioningas
well as for industrial application.
Surface Protection by vortex sintering All galvanized sheet metal parts are protected against
corrosion by a unique coating process developped by e.W. Gohl GmbH. for this purpose the lightly sandblasted parts are heated up to processing temperature in a continuous furnace and then
dippedintoadispersedplasticpowderbath(fluidizedcoating).
Theplasticcoatisapprox.0,3mmoneachside.Thisbrilliantnon-poroussurfaceiselasticand
impact-resistant, resistant against dilute acids and bases, light and air resistant and weatherproof. electrochemical corrosion – caused by globules, chips as well as grinding particles – can
be avoided by vortex sintering.
Technical Requirements
model ................................................................................................
Anzahl der Axialventilatoren ............................ stück
Cooling capacity ......................................................................... kW
Air volume ...................................................... m³/ h
Water inlet temperature ............................................................ °C
fan speed .................................................... min(-1)
Water outlet temperature ........................................................... °C
fan power absorbed ............................................kW
Wet-bulb temperature ................................................................. °C
shipping weight .................................................... kg
Dry-bulb temperature ................................................................. °C
Operated weight .................................................. kg
Change-over point from wet to dry cooling ................................ °C
Dimensions l/b/h .............................................. mm
(atconstantcoolingcapacity)
Noiseat3mhorizontallyinextensionofthe
Watercircuitflowrate .............................................................m³/ h
fan shaft with free acoustic propagation,
with .............................................................weight%ethyleneglycol
approx. .............................................................. dB(a)
Water pressure drop in the heat exchanger ............................. bar
Water capacity in the heat exchanger ........................................ kg
Accessories
surface area of the heat exchanger ........................................... m²
shipping weight with accessories ........................ kg
fresh water consumption by evaporation ............................ m³/ h
Als frischwasser kann jedes Wasser verwendet werden
Operated weight with accessories ........................ kg
Dimensions with accessories l/b/h .................... mm
09
Installation inordertoachieveoptimumthermalperformance,theToPaZ
adiabatic cooler must be installed according to the following criteria:
sufficientspaceleftonbothsidesofthemachine:minimum1,5m(2to
3fans)andminimum2m(4to5fans)asperthesketchesbelow;thiswill
ensurethatairwillenterthecoilsefficientlytocoolthefluid.
inthecaseofamultiplecoolerinstallation,itisimportanttoconsiderthe
main wind direction; in order to avoid recirculation.
The air outlet should be free from any obstacle.
1000
1500
When TOPAZ units are located adjacent to buildings, walls or enclosures, the
top of the fan discharge casing must be aligned with or higher than any adjacent structure.
special care must be taken to avoid recycling of warm saturated discharge air
by drifting into any ventilation inlets located nearby.
Consider and allow for future expansion.
Parapet wall is not
restrective provided
y is equal to or less
than2x.
1000
2000
recommended separation distances for smaller units
(1to2fanunits)
recommendedseparationdistancesfor3to5fanunits
010
Design pipework with some
flexibilitytoallowforvibration,
expansion and contraction.
The dimensions given are
minimum recommendations
only.
for unusual requirements or
detailed recommendations
on location, please consult
us.
Tec h n i c al i n form at i on_ToPaZ
Recommended wet-bulb temperatures for the selection of wet cooling
EUROPE
°C
Belgium
Brussels
22,0
Denemark
Copenhagen
Germany
Berlin
Cologne
°C
Austria
Peru
Lima
24,5
Pakistan
Karachi
27,0
Montevideo
24,0
Philippines
Manila
26,5
Graz
21,0
Uruguay
20,0
Innsbruck
20,0
USA
Boston
24,0
Saudi
Dschidda
30,5
20,0
Salzburg
21,0
Chicago
24,0
Arabien
Medina
26,5
20,0
Villach
20,0
Denver
18,0
Riad
25,5
Frankfurt a.M. 21,0
Vienna
22,0
Los Angeles
21,0
Sri Lanka
Colombo
28,0
24,0
Hamburg
20,0
Poland
Warsaw
21,0
New York
South Korea
Seoul
26,0
Leipzig
20,0
Portugal
Lisbon
22,5
San Francisco 18,5
Syria
Damascus
22,5
Mannheim
22,5
Romania
Bucharest
22,0
Washington
25,5
Thailand
Bankok
28,5
Munich
20,0
Russia
Moscow
21,0
Caracas
22,0
People‘s Rep.
Hongkong
28,0
Nuremberg
19,5
Sweden
Stockholm
17,5
Stuttgart
21,0
Switzerland
Basel
22,5
Australia
19,5
Bern
21,0
Australia
London
19,0
Geneva
22,5
Alexandria
26,5
Manchester
20,0
Lucerne
21,0
Cairo
27,0
Zurich
21,0
Belgrade
23,0
United Kingdom Birmingham
Venezuela
of China
Finnland
Helsinki
19,0
France
Bordeaux
23,5
Serbia
Lyon
22,5
Slovakia
Bratislava
21,0
Asia
Marseille
23,0
Spain
Barcelona
24,0
Afghanistan
Paris
22,5
Czech Rep.
Prague
21,0
Indien
Straßburg
22,0
Turkey
Ankara
19,0
Greece
Athen
22,0
Istanbul
24,0
Rep. Irland
Dublin
18,5
Ukraine
Kiew
25,0
Island
Reykjavic
14,0
Hungary
Budapest
21,0
Italy
Iraq
Florence
21,5
Belarus
Minsk
24,5
Genova
24,5
Cyprus
Nikosia
24,5
Milan
23,0
Naples
24,0
North- and Southamaerica °C
Palermo
25,0
Argentinien
Buenos Aires
Rome
23,0
Brasilien
Rio de Janeiro 25,5
Turin
24,0
Sao Paulo
25,5
Venice
24,5
Chile
Santiago
22,0
Croatia
Karlovac
22,0
Canada
Toronto
23,5
Netherlands
Amsterdam
19,5
Montreal
24,0
Jordanien
Den Haag
19,5
Vancouver
19,5
Iran
Israel
24,0
Japan
Adelaide
20,5
Africa
Brisbane
24,5
Egypt
Melbourne
23,5
Sidney
22,0
26,5
Algier
26,0
Angola
Luanda
27,0
21,0
Ethiopia
Addis Abeba
22,0
Bombay
28,0
Ghana
Accra
28,0
Kalkutta
28,5
Kenia
Nairobi
18,5
Madras
28,0
The Congo
Brazzaville
28,0
Neu-Delhi
25,5
Liberia
Monrovia
28,0
Bagdad
24,0
Lybia
Tripolis
24,5
Basra
27,5
Madagascar
Antananarivo 22,5
Abadan
26,5
Marocco
Casablanca
Teheran
22,0
Haifa
26,5
Jerusalem
22,5
Namibia
Windhuk
19,5
Tel Aviv
26,5
Nigeria
Lagos
28,5
Kabul
25,0
Hiroshima
28,0
Tunisia
Tunis
25,5
Osaka
28,0
South Africa
Cape Town
22,5
Tokio
26,5
Durban
24,5
Amman
20,0
Johannesburg 20,5
Kuwait
Kuwait
27,0
Pretoria
21,5
Khartum
27,0
Port Sudan
31,0
Rotterdam
22,5
Cuba
Havanna
26,5
Lebanon
Beirut
25,5
North Ireland
Belfast
17,5
Mexiko
Mexiko City
17,0
Malaysia
Singapur
28,0
Norway
Oslo
19,5
°C
Luxor
Algeria
Sudan
°C
These wet-bulb temperatures are taken from known publised weather data. They are no peak values, but are suitable for the selection
of wet cooling. They will be reached or passed slightly four times in one statistical year. Changes due to other weather data are possible.
011
Januar2013
E.W. GOHL GmbH
Pfaffenhäule28.78224singen.germany.Phone+497731-88060.fax+497731-880699.info@gohl.de
www.gohl.de