Energy-saving pre-cooling technology based on finned aluminium evaporative media for air-cooled water chiller, condenser, dry cooler, and many other applications
Cost-cutting cooling technology
Evaporative pre-cooling allows a reduction in temperature of air delivered to heat exchanger coils even in hot and humid environments, hence raising efficiency by over a third and expanding the operating envelope of the cooling units.
The evaporative media used in E•VAP™ system made up of water retaining finned aluminium plates designed for maximum evaporation: the saturation efficiency reaches 90% and more at the air velocities of up to 2m/s.
Advantages and benefits
EQUIPPING THE COOLING UNITS WITH E•VAP™ OFFERS:
Energy savings on mechanical cooling of up to 30%
Reducing peak compressor loads
Increased cooling capacity
Expanded operating range
Efficient operation under extremely high temperatures
Low noise emission
ADVANTAGES OVER SPRAY-TYPE ADIABATIC SYSTEMS:
Possibility of water reuse
No need for chemical water treatment
Water is distributed over the length of evaporative pads by spraying over the evaporative media through the orifices located in the header pipe. Each pad row integrated with water redistributor which evenly feeds underlying pads with water. The system operates with tap (potable) water.
The evaporative media made of water retaining finned aluminium plates designed for maximum saturation efficiency which reaches 90% at the air velocities of up to 2m/s. The internal geometry of evaporative media facilitates minor air pressure drops while the special fin coating retains cleanliness of the media during the operation of cooling unit. The system doesn’t require droplet eliminators with the air velocities of up to 3m/s and can be installed at an angle of up to 30° to vertical, depending on configuration. Intake air flows through the wetted environment and cools down due to adiabatic evaporation process.
The system includes a drip tray to collect water for further reuse in an evaporation process. The drip tray directly connected to the pumping station which analyzes returning water and performs necessary treatment.
In order to achieve maximum efficiency and minimal water usage, the pre-cooling system can be equipped with a pumping station which includes circulation pump, water treatment module, and control system with state-of-the-art algorithms that monitor ambient conditions and determine operation modes, ensuring the E•VAP™ system is active only when necessary. The fully automated water management system continuously monitors the water quality, drains the system, and refreshes the water when mineral levels reach certain values.
CONSTRUCTION AND FRAMING
The lightweight, self-supporting aluminium frame has been designed to connect evaporative pads in series horizontally and stack them vertically. While each media pad is detachable, the entire E•VAP™ assembly, in turn, can be disengaged from the cooling unit. E•VAP™ system is also suitable for retrofit applications due to its flexibility, easy installation, and low airside pressure drop. Retrofitting the cooling units with E•VAP™ pre-cooling system results in significant electricity savings of up to 30% and even higher.
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