Control methods and systems for indirect evaporative coolers

Woods, Jason; Kozubal, Erik

Title: Control methods and systems for indirect evaporative coolers

Patent · Tue Sep 22 00:00:00 EDT 2015

OSTI ID:1215830

Woods, Jason; Kozubal, Erik

A control method for operating an indirect evaporative cooler to control temperature and humidity. The method includes operating an airflow control device to provide supply air at a flow rate to a liquid desiccant dehumidifier. The supply air flows through the dehumidifier and an indirect evaporative cooler prior to exiting an outlet into a space. The method includes operating a pump to provide liquid desiccant to the liquid desiccant dehumidifier and sensing a temperature of an airstream at the outlet of the indirect evaporative cooler. The method includes comparing the temperature of the airstream at the outlet to a setpoint temperature at the outlet and controlling the pump to set the flow rate of the liquid desiccant. The method includes sensing space temperature, comparing the space temperature with a setpoint temperature, and controlling the airflow control device to set the flow rate of the supply air based on the comparison.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC36-08GO28308

Assignee:: Alliance For Sustainable Energy, LLC (Golden, CO)

Patent Number(s):: 9,140,460

Application Number:: 13/801,210

OSTI ID:: 1215830

Resource Relation:: Patent File Date: 2013 Mar 13

Country of Publication:: United States

Language:: English

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