Control Methods and Systems for Indirect Evaporative Coolers

Jason Woods (Inventor), Eric Kozubal (Inventor)

Research output: Patent


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.
Original languageAmerican English
Patent number9,140,460 B2
Filing date22/09/15
StatePublished - 2015

NREL Publication Number

  • NREL/PT-5500-65250


Dive into the research topics of 'Control Methods and Systems for Indirect Evaporative Coolers'. Together they form a unique fingerprint.

Cite this