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Founded in 1948 by our late Chairman, Mr Mahendra Swarup
Privately held company
Designing and manufacturing evaporative water cooling
towers and other products related to process cooling for over
5 decades
Sold cooling towers valued at over US$ 2 billion
Cooling more than 640,000,000 litres of water every minute
or 922 billion litres every day
Team consists of highly qualified engineers and professionals
with over 2,800 man-years of experience
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Main business is process cooling equipment – cooling towers, air-cooled heat exchangers and air-cooled steam condensers
The only company in the world having integrated manufacturing with five factories for process cooling equipment
90% of turnover and profits are from the process cooling business
Top management fully dedicated to process cooling
Diversified interests in wind energy, real estate and flexible packaging
Headquarters in Kolkata, India
Branch offices in New Delhi,
Mumbai, Chennai, Hyderabad,
Bangalore and Vadodara
U.S. office in Denver, Colorado
Indian and global sales network
Five manufacturing locations
around India
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KOLKATA WORKS Est. 1948
Area 16,000 sq. m
Manufactured items include:
Mechanical components
Aluminium and FRP fans
Gearboxes
Drive shafts
Flow control valves
Low oil level switches
FRP fan cylinders, basins, grids, etc.
Steel fabrication
PVC fill sheets and drift eliminators
Package and pre-engineered cooling towers
Industrial cooling tower components
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Manufactured items include:
Mechanical components
FRP fans
Gearboxes
Drive shafts
FRP fan cylinders, grids, etc.
SS grids
PVC/HTRE plastic splash bars
PVC drift eliminators
Fabrication and preservative treatment of wood components
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SAHIBABAD WORKS U.P. (near Delhi) Est. 1972
Area 40,000 sq. m
Manufactured items include:
FRP fan blades
FRP fan cylinders
FRP side casings
PVC rolls for fill sheets
PVC fill sheets and drift eliminators
Fabricated items
Package and pre-engineered cooling towers
Air-Cooled Heat Exchangers
Air-Cooled Steam Condensers
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BHASA WORKS W.B. (near Kolkata)
Est. 1992
Area 25,000 sq. m
Fabrication of wood components for cooling towers
Preservative treatment of wood components
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Manufactured items:
Air-Cooled Steam Condensers Single Row
Multi Row
KANDLA WORKS Gujarat
Est. 1997
Area 40,000 sq. m
SAVLI WORKS Gujarat (near Vadodara)
Est. 2012
Area 46,000 sq. m
SERIES AQ-3800 FRP & SERIES AQ 4800 STEEL
Steel Low energy consumption
Low sound level
High efficiency film-type fill
Corrosion resistant fibreglass construction
Rugged mechanical equipment
Low maintenance costs
V-belt drive
Venturi fan cylinder
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SERIES QF-20K FRP
Unique octagonal design
Corrosion-resistant fibreglass
construction
High efficiency PVC film-type fill
Rugged mechanical equipment
Easy maintenance
Architects’ delight
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SERIES 6KF FRP
Corrosion-resistant fibreglass
construction
High efficiency PVC film-type fill
Time-tested Paharpur power train
Long service life
Easy maintenance
Easy expansion
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SERIES CF-I & CF-II FRP
Induced draught, counterflow
design
Available in multi-cell configuration
for virtually any cooling capacity
Fans available with both gear- and
direct-drive option
P-25 spray nozzles for uniform water
distribution
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SERIES 9KF FRP
Paharpur’s latest FRP unitary cooling
tower
Corrosion-resistant pultruded FRP
structure
FRP casing, louvres and fan cylinder
Over 30 models with nominal capacity
of 160 to 1000 TR per cell
High efficiency PVC film-type fill
Time-tested Paharpur power train
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SERIES OXF-30K
Paharpur’s latest CTI certified FRP
unitary cooling tower
Crossflow design
Only CTI certified crossflow tower in
India
FRP casing and fan cylinder
High efficiency PVC film-type fill
Time-tested Paharpur power train
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SERIES CF 3
Paharpur’s latest CTI certified FRP
unitary cooling tower
Counterflow design
Corrosion-resistant pultruded FRP
structure
FRP casing, louvres and fan cylinder
High efficiency PVC film-type fill
Time-tested Paharpur power train
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SERIES 9 SF AND 10 DF WOOD
Designed for high efficiency and low
operating costs
Low profile enables integration with
architectural surroundings
Low plan area
High capacity per cubic foot
Fill and drift eliminators are optimised
to deliver maximum cooling with
minimum power
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SERIES 15 & 18 WOOD
Highly versatile
Available in single and dual air
intake configurations
Splash type fill – of treated wood or
PVC/PP
Can cope with poor water quality
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SERIES S-100, 120 & 160 WOOD
Low profile and pumping head
Low operating costs
Efficient PVC fill with integral
louvres and eliminators
Stainless steel fill support system
No framing obstructions in fill area
Industrial duty mechanical
equipment 19
CLASS 400 WOOD/FRP & 800 CONCRETE
Designed for dependability, durability
and operational simplicity
Low pumping head
Rectangular, counterflow design
In-line or back-to-back configurations
PVC film/splash type or pre-stressed
concrete splash type fill
PVC drift eliminators
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CLASS 500 WOOD Pressure treated wood provides high
strength and longevity
Crossflow design
Design permits variations in fill type/density/fan type/size/fan cylinder height and shape to optimise tower sizing
Efficient fill configuration
FRP fan cylinders
Sturdy mechanicals
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CLASS 600 WOOD Cross flow design
Low drift
Minimal long term maintenance costs
Both single and dual air intake configurations
High efficiency
Long service life
Available with PVC or treated wood splash fill
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CLASS 1000 CONCRETE Non-combustible
Pre-cast and pre-stressed structural components reduce construction time
Choice of treated wood, concrete and plastic fill for longevity and durability
Available in more than 20 combinations of cell length and fill height with a variety of fill and fan options
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CLASS 800 NATURAL DRAFT HYPERBOLIC Suitable for the largest heat load
applications
Absence of fans results in energy saving
Simplicity of operation
Total avoidance of heated air recirculation
Available in cross flow and counter flow design
PVC film/splash type or pre-stressed concrete splash type fill
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RCC CHIMNEYS
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Extension of cooling tower
construction business
Built chimneys as high as 275 m
(902 ft)
Single/twin flue
Steel/brick lining
At JSW Bellary, flue was of RCC up to a
height of 105 m (done for the first time
in Asia), balance 170 m was brick
Over 1,000 units in service
Thermal designs conform to HTFS standards
Design pressures up to 160 bar
Complete header box range – plug, cover, manifold, D-type
Complete finned tube range – L, G, extruded, welded
Comprehensive process control options – steam coil, louvres, warm air recirculation
Fans and drives designed specially for ACHE application
ASME U-Stamp authorisation, if required
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Cooling Tower is a device for
evaporative cooling of water
by direct contact with air
Ambient wet bulb
temperature is the limiting
temperature to which water
can be cooled
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Approach – Difference
between Cold water
temperature and Wet
Bulb temperature
Range – Difference
between Hot water
temperature and Cold
water temperature
AC System - highest
power consumer of a
building
Chillers – highest power
consumer of AC System
Chillers must be energy efficient if building has to be energy efficient
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Chiller power consumption
can be reduced by reducing
the condenser water
temperature at chiller inlet
0.586
0.592
0.597
0.603
0.609
0.614
0.62
0.626
0.632
0.56
0.57
0.58
0.59
0.6
0.61
0.62
0.63
0.64
86.6 87.1 87.6 88.1 88.6 89.1 89.6 90.1 90.6
Entering Condenser Water Temp vs IKW/TR
IKW
/TR
Entering Condenser Water Temp (Deg F)
Parameters Case 1 Case 2
Option 1 Option 2
Water flow rate 1650 USGPM 1650 USGPM 1650 USGPM
Hot water
temperature
1000 F 950 F 950 F
Cold water
temperature
900 F 850 F 850 F
Wet bulb temperature 830 F 830 F 830 F
Cooling Tower
selection
Model No.6153 Model No.978S/20
HP X 2 Nos.
Model No.988S/15 HP
X 2 Nos.
Cost of cooling tower INR 768000 INR 1888000 INR 2245000
Cooling Tower Fan
BHP
28.07 2x18.95 = 37.9 2X13.86 = 27.72
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Parameters Case 2 - Option 1 Case 2 – Option 2
Differential cost of C.T. INR 1120000 INR 1477000
Net energy saving in kW 33 – (37.9-28.07)X0.746 = 25.67 33– (27.72-28.07)X0.746 = 33.26
(A) Alt-I:- 5000 hrs
chiller operation
Energy saving 25.67 X 5000 X 10 = INR 1283500 33.26 X 5000 X 10 = 1663000
Payback period 1120000/1283500X12=10.5 months 1477000/1663000X12=11 months
(A) Alt-II:- 8000 hrs
chiller operation
Energy saving 25.67 X 8000 X 10 = INR 2053600 33.26 X 8000 X 10 = 2660800
Payback period 1120000/2053600X12=6.5 months 1477000/2660800X12 =7 months
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Green towers cost more
Higher initial cost is offset
by the energy saving in the
entire HVAC system
Payback period usually less
than 12 months