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Title: Control methods and systems for indirect evaporative coolers

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.
Inventors:
;
Issue Date:
OSTI Identifier:
1215830
Assignee:
Alliance For Sustainable Energy, LLC (Golden, CO) NREL
Patent Number(s):
9,140,460
Application Number:
13/801,210
Contract Number:
AC36-08GO28308
Resource Relation:
Patent File Date: 2013 Mar 13
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION

Works referenced in this record:

A desiccant-enhanced evaporative air conditioner: Numerical model and experiments
journal, January 2013

Development and Analysis of Desiccant Enhanced Evaporative Air Conditioner Prototype
report, April 2012
  • Kozubal, E.; Woods, J.; Judkoff, R.
  • NREL/TP-5500-54755
  • DOI: 10.2172/1043778

Liquid desiccant based two-stage evaporative cooling system using reverse osmosis (RO) process for regeneration
journal, October 2007