In many areas of the globe, water has become a critical natural resource. To address this, a variety of non-conventional cooling towers have been developed to consume less water, while still meeting the cooling capacity of a traditional evaporative tower. The variety in the design and operation of these hybrid cooling towers results in a wide spectrum of water savings potential, which is further amplified when considering the climate in which the hybrid cooling tower will be installed. Currently, there is no generally-accepted method for estimating the expected water savings from a specific hybrid design at a specific site; nor is there a generally-accepted method for verifying that the estimated water savings was realized. This paper proposes methods for both standardization of hybrid water savings calculations and verification of water savings by field measurements.
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