ATWB Closed Circuit Cooler
EVAPCO ATWB Closed Circuit Cooler – Principle of Operation
The process fluid enters the Thermal-Pak II coil through the top coil connection and circulates through the coils. The water distribution system cascades water over the tubes of the coil, transferring heat to the water.
 |
Air is drawn upward and over the coils by the axial fan, agitating the falling water and increasing the transfer of heat. A small amount of the recirculating water evaporates due to latent heat transfer through the tube and fin walls of the Thermal-Pak II coil, removing heat from the system. The cooled fluid then returns to the process via the bottom coil connection.
Product Features
Thermal-Pak II Coil
EVAPCO’s Thermal-Pak II coils patented design assures maximum cooling capacity. The airflow through the coil is counterflow to the fluid flow, providing the most efficient heat transfer process. A special coil design is utilized to reduce the air pressure drop through the unit while maximizing tube surface area and increasing its heat transfer capabilities.
- Elliptical return bends allows for more circuits per coil bundle increasing the maximum capacity per footprint
- Coil located in airstream increasing dry bulb switchover temperature
- CrossCool Internal Tube Enhancement increase fluid turbulence providing additional evaporative capacity
- Available in type 304 SS or type 316 SS construction
Drift Eliminators
- Limits the drift rate to less than 0.001% of the recirculating water rate
- Limit the potential of spreading Legionella
- Constructed of an inert polyvinyl chloride (PVC)
Superior Air Inlet Louver and Screen Design
- Constructed of an inert polyvinyl chloride (PVC)
- Two pass design that minimizes splash-out and the potential for algae formation inside the tower
- Framed in steel in easily removable sections
Pressurized Water Distribution System
EVAPCO’s Zero Maintenance ZMII® spray nozzle remains clog free while providing even and constant water distribution, providing the industry’s best performing non-corrosive, maintenance-free water distribution system.
- ZMII spray nozzles have a 1-1/4″ diameter opening and a 1-1/4″ splash plate clearance
- Mounted in corrosion-free PVC water distribution pipes that have threaded end caps
- Provides unequaled coil coverage and scale prevention
Equipment Upgrades
Stainless Steel Water Touch Basin
- Available in Type 304 or Type 316 Stainless Steel
- Includes the entire basin area including the support columns and the louver frames
- Welded basin seams for leak-free operation
Stainless Steel Casing & Fan Section
- Available in Type 304 or Type 316 Stainless Steel
- Includes the entire upper section including fan guard
Sound Sensitive Installations
Available with multiple equipment options to reduce the overall sound generated from the side or top of the unit.
- Super Low Sound Fan
- Low Sound Fan
- Water Silencers
- Discharge Attenuation
- Offset Sound Attenuation Walls
FACTORY-MOUNTED Water Treatment Systems
Available with FACTORY-MOUNTED water treatment systems, providing environmentally sensitive alternatives for treating water in evaporative cooled equipment.
- SmartShield solid chemical water treatment system
- Pulse-Pure CHEMICAL-FREE water treatment system
Maintenance Accessories
Available with multiple equipment options to aid in the maintenance of the closed circuit cooler.
- External service platform
- Basin level platform
- Sloped ladder
- Hinged louver access door
- Motor davit with base