EAVWA

The adiabatic system involves fully wetting a fibrous pad located in front of the coil.

Hot process fluid enters the inlet header connection, shown in red. Heat from the process fluid dissipates through the coil tubes surface and out to the fins. The adiabatic system involves fully wetting a fibrous pad located in front of the coil. Ambient air is drawn through the adiabatic pre-cooling pad by the fans located on top of the unit. The air is humidified as it passes through the adiabatic pad, decreasing the ambient dry bulb temperature within a few degrees of the ambient wet bulb temperature. This new air temperature is referred to as the depressed dry bulb. This pre-cooled air is then drawn through the tube and fin surface, offering a substantial increase in heat rejection capability. Heat from the process fluid transfers to the air and discharged to the atmosphere. Cool process fluid exits the unit through the connections shown in blue.

Adiabatic Pre-cooling System

  • Wetted pads can be utilized for pre-cooling entering air, resulting in greater energy savings and increased capacity with minimal water use
  • Great for high ambient dry bulb climates or high temperature applications
  • Once-through design
  • No water treatment required
  • No cold water basin or pump
  • No drift
  • UL Listed

Reduced or Eliminated Water Consumption

Compared to traditional evaporative systems, the eco-Air series will either eliminate or dramatically reduce water consumption. Adiabatic models only use water when the ambient conditions and load require it. Reducing water consumption also reduces the ongoing expenses related with the cooling equipment such as purchasing, treating, and disposing of water. When the eco-Air adiabatic models are used in conjunction with the EVAPCO controls package, water conservation is maximized based on proprietary PLC logic.

Reduced Maintenance

Scaling, corrosion, and water born bacteria concerns are minimized or eliminated with dry and adiabatic cooling equipment. The eco-Air Series reduces the maintenance traditionally associated with fully evaporative systems. The eco-Air adiabatic condenser is designed as a once through system, meaning it has no pump and no basin to hold water, which further reduces the time required for maintenance. Additionally, the adiabatic pads filter the air before reaching the coil, limiting the exposure of dirt and debris to the tube and fin heat transfer surface. Both NEMA and EC motor options require zero routine maintenance. There are no bearings to grease, belts to adjust, or fans to pitch and balance.

Advanced Motor Technology

Available with Electronically Commutated (EC) or NEMA fan motor designs. The motors on the eco-Air series are pre-wired at the factory to UL standards, reducing costs associated with field wiring. As standard, all units are wired to a common terminal box. Adding the EVAPCO controls package allows for both single point power supply and complete capacity control.

  • NEMA
    • Premium efficient direct drive
    • Zero maintenance sealed bearings
    • VFD ready
    • Severe Duty
  • EC Motors
    • Latest development in energy savings and speed control
    • High efficiency wing tip fans operate up to 3 dB quieter than conventional blade fans
    • Improved part speed energy consumption
    • Zero maintenance
    • Integrated speed control
  • Advanced Construction - Superior Stainless Steel Technology
    • Constructed with high-grade Type 304L stainless steel tubing as standard
    • Meets ASME B31.5 refrigerant piping code
    • Available in 5/8-inch OD
  • Coil Return Bend Covers
    • Protects the coil return bends during handling and operation
  • Large Inspection Panel
    • Easily removable for interior inspection and access to coils and fan motors
  • Easy Rigging
    • All units are designed to ship and install as a single piece
  • Fork Lift Channels
    • Standard on all units up to 27 feet in length
  • Individual Motor Disconnect Switches
    • Mounted at each fan motor to electrically isolate individual motors
  • Internal Step Deck
    • Platform and grab rail for access to elevated fan section components
  • Epoxy Coated Fins
    • Increased corrosion resistance
    • No impact on unit capacity
  • EVAPCO Control Package
    • EVAPCO PLC Controller
    • Supervisory control system integration
    • Fan speed control
    • EC Motor Option: Modbus control of EC fan
    • NEMA Motor Option: Packaged VFD with bypass switch
    • UL Listed
    • NEMA 3R Rated
    • Thermal overload and short circuit protection of each motor
    • Operate and fault indicator lights on outside of panel
    • Refrigerant Pressure Sensor (shipped loose)
    • Ambient Temperature Sensor
    • Solenoid control of adiabatic pre-cooling system
    • Rain/Sun Protection Hood (optional)

Coil Design: Through the use of computational fluid dynamics (CFD) modeling software, finite element heat transfer analysis, and proprietary coil performance calculation methods, EVAPCO engineers have identified significant design elements to improve the finned coil performance. The extensive computer modeling has been refined and verified through coil performance evaluation in EVAPCO's state-of-the-art research laboratories.

EVAPCO Control Package: The EVAPCO Control Package is factory mounted and wired when configuration and shipping limitations allow. Provides operating sequence and fan speed control based on real-time heat loads and ambient conditions.

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