3. 3
New Ellipti-fin™ Coil Technology
• Spiral Fins Applied to the Thermal-Pak Coil!
• All Rows are Finned!
4. 4
New Ellipti-fin™ Coil Technology
• 3 Fins Per Inch
• Increased
Evaporative
Capacity
• Same Footprint
• Less Horsepower
• Increased Dry
Capacity
Increases Evaporative Capacity In the
Wet Mode…Energy Savings!
5. 5
eco-ATW
Two Modes of Operation:
Evaporative Mode
(Latent Heat Transfer)
Energy Savings
Dry Mode
(Sensible Heat Transfer)
Water Savings
7. 7
eco-ATWE
Third Mode of Operation:
Water Efficient Mode
(Combined Evaporative and Dry Mode)
• Two Pumps
• Two Water Distribution
Systems
• Two Ellipti-fin™ Coils
• Air Tight Partition
11. 15
eco-ATWE
The Ideal Solution for:
• Lower Energy Consumption
• Reduced Water Usage
• High Dry Bulb Switchover
Points
• Built in Redundancy
12. 16
Water & Energy Conservation
Ensures Predicted Water and
Energy Usage
• The NEW ® Water and
Energy Conservation Control
System is Available with the
eco-ATW!
• The NEW ® Water and
Energy Conservation Control
System is Standard on eco-
ATWE!
• Can Be Programmed With
Energy Savings or Water
Savings Priority
13. 17
Water & Energy Conservation
• A NEMA 4 Painted Steel
Enclosure
• Single Point Power with
Main Disconnect
• Transformer for Low
Voltage
• UL & cUL Approval
• Climate Controlled
14. 18
Water & Energy Conservation
• 10” Touch Screen with
Color Display
• Weather Enclosure for HMI
15. 19
Water & Energy Conservation
• Allen-Bradley PLC
• One VFD per Fan Motor
• One Starter per Spray Pump
Motor
• Four Temperature Sensors:
– 1) Fluid In
– 2) Fluid Out
– 3) Ambient Dry Bulb Temperature
– 4) Basin Water Temperature
• Interface to BAS via MODBUS
16. 20
Water & Energy Conservation
Standard Features Additional Features
• Manual Bypass Connectors Around • Discharge Hood Damper
VFD Actuator
• Heater Control Package w/ Contactor • Vibration Switch
and Overload Protection and Fusing
• 5-Probe Electronic Water Level • Pulse~Pure
Control Package
• High Water Level Alarm Contact(s)
• Low Water Level Alarm Contact(s)
• Fan Motor: Space Heater
17. 21
Water & Energy Conservation
• Since the Sage panel uses a PLC, it can adjust
the various mode of operation switch points as
the system load changes throughout the day
by measuring and analyzing the following data
points:
• Inlet Temperature, Outlet Temperature, Dry
Bulb Temperature, VFD Speed, Fan
RPM, Pump Status – On/Off.
18. 22
Water & Energy Conservation
– Manually Enable De-Icing Sequence
– Automatic De-Icing Sequence
• Program Temperature Set points
• Program Duration for Sequence
• Set Time Requirement Between De-Icing Sequences of
Operation
19. 23
Water & Energy Conservation
Additional Programming Benefits
• Manual Operation of Pumps and Fans
• Ability to Enable or Disable Make-Up Valve for Winter Operation
• Power Failure Recovery Timer With The Ability To Restart At Previous
Operating Set Points
• Ability to Perform Bump Test
• Visual Status Display of All Unit Components and Accessories
• Contacts and Counter With an Analog Signal for (Customer Supplied)
Make-Up and Drain Water Meter(s)
• Contacts and Analog Signal for (customer supplied) Conductivity Meter
• Backup with User Settings and Factory Settings
• Pump Run Time Recorder
• Fan Motor Run Time Recorder
20. 24
Water & Energy Conservation
• Heater
• Intake/Exhaust Fan
21. 28
Performance
eco-ATW eco-ATWE
12-6L12-Z 12-6L12-Z ESWA 144-34L ATWB 17-5K12-Z
Fan Motor HP 25 25 25 (2) 20
Spray Pump HP 5 (2) 2 10 (2) 3
Box Size (ft) 12x12 12x12 12x12 17x12
Weight (lbs.) 37,530 38,115 24,880 39,700
• Constant Load (Minneapolis, MN)
• 650 gpm (water) 95 F / 85 F / 78 F EWB
• Reduce Pump HP vs. ESWA
• Reduced Total HP and Footprint vs. ATWB
24. 34
Performance
Total Pump Total Fan Drybulb Water Usage % Water Energy Usage % Energy
Unit (HP) (HP) Footprint Height Switchover (gal) Savings (KW-hr) Savings
ESWA 102-46K 7.5 20 8.5'x12' 17' 4" N/A 1,122,902 N/A 56,160 N/A
ATWB 17-3J12-Z 6 30 17'x12' 11' 11-3/4" 2.7 830,902 26% 31,253 44%
eco-ATW 10-3J18 7.5 15 10'x18' 13' 5-7/8" 33.5 520,858 54% 19,877 65%
eco-ATWE 10-3J18 6 15 10'x18' 13' 5-7/8" 33.5 407,314 64% 17,967 68%
Editor's Notes
the NEW family of closed circuit coolers (click), the eco-ATW and eco-ATWE offer Environmentally Conscious Operation Featuring Water and Energy Conserving Technology
CB TALKING POINTS:-Finned coils were available in the past but were only available on round tubes, not elliptical tubes. This difference is a big deal! Round tubes offered dry performance with 3 major drawbacks -EXPENSIVE: Each round tube that was finned was hand welded into a coil circuit. Over 100 hand welds per row of finned tube -LIMITED # OF ROWS: Fins impeded air flow so only 5 rows were available on induced draft equipment. More rows on Forced draft equipment BUT required increased HP -NO IMPROVED WET PERFORMANCE: Fins only guaranteed better dry performance, not wet. -Elliptifin coils overcome all 3 of these shortcomings! -REDUCED COST -ALL ROWS FINNED -IMPROVED WET PERFORMANCE Building on the original patented Thermal-Pak Coil, Evapco’s revolutionary Ellipti-Fin coil technology is the heart of the new eco-cooler product family.As you know, only round tubes were finned…. Now, elliptical tubes are finned! The fins, are applied to EVAPCO’s Thermal-Pak elliptical tubing prior to hot-dip galvanizing.The eco-cooler family features ALL rows of the coil finned as standard.
The new eco-ATWE is designed for additional Water Savings and incorporates a third mode of operation called the Water Efficient mode.(Click)The eco-ATWE introduces simultaneous wet and dry operation for water and energy savings.(Click)The eco-ATWE also has two pumps, two water distribution systems and of course two coils… and an air tight partition to separate the wet and dry operating modes.This design allows the unit to operate in three modes, Evaporative, Water Efficient and the Dry Mode.[CLICK]
The new eco-ATWE is designed for additional Water Savings and incorporates a third mode of operation called the Water Efficient mode.(Click)The eco-ATWE introduces simultaneous wet and dry operation for water and energy savings.(Click)The eco-ATWE also has two pumps, two water distribution systems and of course two coils… and an air tight partition to separate the wet and dry operating modes.This design allows the unit to operate in three modes, Evaporative, Water Efficient and the Dry Mode.[CLICK]
Let’s highlight some of these additional features. CLICKSince each coil features it’s own dedicated water distribution system, the eco-ATWE is available on multi-coil units only.CLICKAs you can see, each coil has an independent pump and water distribution system. In this picture only pump A is in operation.CLICKBoth coils are completely separated by an air tight partition that begins above the drift eliminators in the fan section and ends just above the pan bottom.CLICK
Since the Sage panel uses a PLC, it can adjust the various mode of operation switch points as the system load changes throughout the day by measuring and analyzing the following data points: Inlet Temperature, Outlet Temperature, Dry Bulb Temperature, VFD Speed, Fan RPM, Pump Status – On/Off.
