EarthSmart Adiabatic Cooling Tower
Significantly Reduced Water Consumption
With improved, multi-mode controls that conserve electricity while dramatically reducing water consumption, the latest EarthSmart adiabatic cooling towers (ESTW Series) provide a cost-efficient process-cooling solution, says manufacturer Conair.
The new adiabatic towers eliminate the constant water consumption and treatment requirements of conventional evaporative towers, utilizing closed-loop cooling that isolates process water from contamination, cycling it through finned heat exchangers where ambient air absorbs process heat and cools it for recirculation. The advanced controls in EarthSmart adiabatic towers offer multiple modes that also save energy and water in conditions when less than full cooling capacity is required. In normal mode, the system runs without using any water and the smart control regulates fan speed, air flow, and process coolant flow to achieve the desired process cooling set-point. No adiabatic cooling water is used.
When conditions require additional cooling, it operates in either of two wet modes and gives processors the flexibility to choose whether to conserve water or power, depending on changing utility and resource costs:
- In water-saving mode, the control minimizes water consumption in favor of increased airflow to achieve the desired process-cooling set-point. In this mode, the tower makes maximum use of fan speed and ambient air flow to provide process cooling capacity. The control system allows for use of water on the adiabatic cooling pads only if airflow at maximum fan speed is insufficient to achieve or maintain the process cooling set-point.
- In energy-saving mode, the control system reduces electrical consumption by activating use of adiabatic cooling as soon as power consumption reaches a user-defined set-point. Adiabatic cooling is then increased until process cooling needs are satisfied or adiabatic capacity is up to 100% before power consumption is increased.
These resource-saving features are why EarthSmart adiabatic towers cut water consumption up to 80% compared to conventional evaporative tower systems, according to the manufacturer. EarthSmart controls are built around an advanced, application-specific PLC. All towers feature variable-speed, electrically commutated fans and circulating motors that enable the controls to precisely match changing cooling-load requirements by varying fan/motor speeds, controlling the release of adiabatic cooling water, and regulating the speed of process-coolant flow.
Conair offers eleven models of EarthSmart adiabatic tower chillers (ESTW Series), available to handle nominal process coolant flow rates from as little as 45 gal/min (170 l/min) up to 510 gal/min (1930 l/min), with cooling capacities ranging from 17 tons to 195 tons.
Conair Corporate Office
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