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Title: Control methods and systems for indirect evaporative coolers

Abstract

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

Citation Formats

Woods, Jason, and Kozubal, Erik. Control methods and systems for indirect evaporative coolers. United States: N. p., 2015. Web.
Woods, Jason, & Kozubal, Erik. Control methods and systems for indirect evaporative coolers. United States.
Woods, Jason, and Kozubal, Erik. Tue . "Control methods and systems for indirect evaporative coolers". United States. https://www.osti.gov/servlets/purl/1215830.
@article{osti_1215830,
title = {Control methods and systems for indirect evaporative coolers},
author = {Woods, Jason and Kozubal, Erik},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {9}
}

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