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Hydronic rooftop cooling systems

United States Patent

January 29, 2008
View the Complete Patent at the US Patent & Trademark Office
U.S. Department of Energy - Visit the Office of the Assistant General Counsel for Technology Transfer & Intellectual Property Website
A roof top cooling unit has an evaporative cooling section that includes at least one evaporative module that pre-cools ventilation air and water; a condenser; a water reservoir and pump that captures and re-circulates water within the evaporative modules; a fan that exhausts air from the building and the evaporative modules and systems that refill and drain the water reservoir. The cooling unit also has a refrigerant section that includes a compressor, an expansion device, evaporator and condenser heat exchangers, and connecting refrigerant piping. Supply air components include a blower, an air filter, a cooling and/or heating coil to condition air for supply to the building, and optional dampers that, in designs that supply less than 100% outdoor air to the building, control the mixture of return and ventilation air.
Bourne; Richard C. (Davis, CA), Lee; Brian Eric (Monterey, CA), Berman; Mark J. (Davis, CA)
Davis Energy Group, Inc. (Davis, CA)
10/ 885,001
July 7, 2004
This invention was made with Government support under Contract #DE-FC26-00NT40991 awarded by the United States Department of Energy. The Government has certain fights in the invention.