Free-cooling Dry Fluid Cooler For Industrial Process Cooling

Closed-loop process cooling systems are gaining attention among a growing number of industries with the introduction of more stringent regulations on water use and increasing costs for water purchase and discharge. A hybrid cooling system where the dry cooling and evaporative cooling technologies are taken together is an attractive alternative to open-loop cooling towers in terms of both water saving and efficiency.

The basic operating principle of the hybrid dry cooler is rejecting the heat by means of latent, or evaporative, heat transfer. In a typical dry cooler system, the closed-loop fluid is cooled by sensible heat transfer and the approach temperature of a dry cooler is based on the dry bulb, while in a hybrid dry cooler equipped with evaporative cooling pads its approach temperature is based on the wet bulb which takes into account the moisture in the air stream and which is always lower than the dry bulb temperature. The warmer the climate, the more the efficiency of using hybrid dry coolers. Hybrid dry coolers are also a cost-effective technology for water conservation compared to water-intensive open-loop cooling systems where the water is constantly exposed to the ambient air.

Features:

Intelligent control of speed and wetting
Water saved by volume control
Very low energy consumption thanks to EC fans
Very low water consumption because dry/wet switchover is set at a high level

Multifunctional use of humidifi cation pads
Easily removed for dry operation
Pads locate on cooler during winter, no need to store them elsewhere
Frames protect the pads from damage
No spraying
No water treatment needed
Unlimited wetting duration

System checked for aerosol output
Hygienic operation
Plume-free
No water circulation
Automatic draining
Dry cooling coil
No deposits or corrosion

Crane transport with no need for lifting beam
Easily transported by crane thanks to two moveable lifting lugs
Quick and easy installation
Optimal distribution of forces
Rigid structure, resistant to deflection

High power density
V construction
Unit height
Minimal footprint

Minimal number of support feet
High level of static stability
Saves effort on site with subconstruction
Optionally with spring supports

Service
Maintenance
Cleaning
Provision of spare parts
High system competence

Dry operation
With no wetting of the unit it operates like a conventional finned dry cooler
Energy is dissipated to the ambient air via convection

Wet operation
For high external temperatures or systems subject to higher cooling loads
Even without directly wetting the heat exchangers, the fluid can be brought down below the ambient temperature
Energy dissipated by convection

Packing: