Control methods and systems for indirect evaporative coolers

Woods, Jason; Kozubal, Erik

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A - human necessities
A01 - agriculture
A21 - baking
A22 - butchering
A23 - foods or foodstuffs
A24 - tobacco
A41 - wearing apparel
A42 - headwear
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A44 - haberdashery
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A99 - subject matter not otherwise provided for in this section
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B62 - land vehicles for travelling otherwise than on rails
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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:: Woods, Jason; Kozubal, Erik

Issue Date:: 2015-09-22

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1215830

Patent Number(s):: 9140460

Application Number:: 13/801,210

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

Patent Classifications (CPCs):: F - MECHANICAL ENGINEERING F24 - HEATING F24F - AIR-CONDITIONING

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

Show more

F - MECHANICAL ENGINEERING F24 - HEATING F24F - AIR-CONDITIONING
F24F1/0007 - Indoor units, e.g. fan coil units
F24F1/0059 - characterised by heat exchangers
F24F3/1417 - {with liquid hygroscopic desiccants}
F24F5/0035 - {using evaporation}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
Y02B30/54 - Free-cooling systems
Y02B30/62 - Absorption based systems

Show less

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

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                    Woods, Jason, and Kozubal, Erik. Control methods and systems for indirect evaporative coolers.  United States: N. p., 2015. 
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                    Woods, Jason, & Kozubal, Erik. Control methods and systems for indirect evaporative coolers.  United States.

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                    Woods, Jason, and Kozubal, Erik. Tue .  
        "Control methods and systems for indirect evaporative coolers".  United States.  https://www.osti.gov/servlets/purl/1215830.

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@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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Methods and Systems for Desiccant Air Conditioning
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Methods and Systems for Desiccant Air Conditioning
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journal, October 2000

El-Dessouky, H. T.; Ettouney, H. M.; Bouhamra, W.
Chemical Engineering Research and Design, Vol. 78, Issue 7
https://doi.org/10.1205/026387600528111

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

Al-Sulaiman, Faleh A.; Gandhidasan, P.; Zubair, Syed M.
Applied Thermal Engineering, Vol. 27, Issue 14-15, p. 2449-2454
https://doi.org/10.1016/j.applthermaleng.2007.02.010

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Title: Control methods and systems for indirect evaporative coolers

Abstract

Citation Formats

Solar collector for heating a fluid patent, September 1980

Heat transfer pack patent, April 1981

Hair dryer patent, December 1983

Combination direct and indirect evaporative media patent, October 1985

Indirect evaporative cooling system patent, May 1989

Apparatus for indirect evaporative gas cooling patent, December 1990

Low-flow internally-cooled liquid-desiccant absorber patent, October 1994

Indirect contact chiller air-precooler method and apparatus patent, February 1995

Method and apparatus for latent heat extraction patent, February 1996

Heat exchange assembly patent, June 1997

Thermally regenerated desiccant air conditioner with indirect evaporative cooler patent, January 1999

System for monitoring outdoor heat exchanger coil patent, January 1999

Desiccant/evaporative cooling system patent, January 2001

Liquid desiccant air conditioner patent, April 2001

Desiccant-containing stopper patent, June 2001

Dehumidifier/air-conditioning system patent, December 2002

Method and apparatus of indirect-evaporation cooling patent, December 2002

Dehumidification using desiccants and multiple effect evaporators patent, February 2003

Dehumidification process and apparatus patent, April 2003

Control system for gas turbine inlet-air water-saturation and supersaturation system patent, October 2003

Enthalpy pump patent, February 2004

Modularized power supply patent, May 2004

Membrane desiccation heat pump patent, May 2004

Crosslinked polymer electrolyte membranes for heat and moisture exchange devices patent, January 2005

Method of evaporative cooling of a fluid and apparatus therefor patent, February 2005

Method and plate apparatus for dew point evaporative cooler patent, April 2007

Versatile dehumidification process and apparatus patent, July 2010

Evaporative cooler, heat recovery device, and ventilation device patent, August 2011

Indirect evaporative cooler using membrane-contained, liquid desiccant for dehumidification patent, July 2014

Method and apparatus of indirect-evaporation cooling patent-application, April 2002

Method and apparatus of indirect-evaporation cooling patent-application, January 2003

Method of evaporative cooling of a fluid and apparatus therefor patent-application, February 2003

Heat and moisture exchange device patent-application, June 2003

Indirect evaporative cooling mechanism patent-application, April 2004

Dehumidifier/Air-conditioning System patent-application, June 2004

Cooling/heating system of air conditioner patent-application, July 2004

Systems and methods for conditioning air and transferring heat and mass between airflows patent-application, May 2005

Indirect evaporative cooling of a gas using common product and working gas in a partial counterflow configuration patent-application, September 2005

Crosslinked polymer electrolyte membranes for heat, ion and moisture exchange devices patent-application, September 2005

Self-powered evaporative cooler patent-application, March 2007

Multi-stage Hybrid Evaporative Cooling System patent-application, May 2007

Anti-Reflection Etching of Silicon Surfaces Catalyzed with Ionic Metal Solutions patent-application, September 2009

Solar-assisted climate control system patent-application, January 2010

Enhanced HVAC System and Method patent-application, February 2010

Process for Preparing Isocyanates patent-application, February 2010

Process for Structuring Silicon patent-application, April 2010

Metal-Assisted Chemical Etching of Substrates patent-application, September 2010

Molecule Sulfonation Process patent-application, October 2010

Indirect Evaporative Cooler Using Membrane-Contained, Liquid Desiccant for Dehumidification patent-application, December 2010

Water distillation method and apparatusfor indirect evaporative coolers patent-application, May 2011

High Efficiency Heat Exchanger and Dehumidifier patent-application, May 2011

System and Methods for Cooling Data Centers and Other Electronic Equipment patent-application, August 2011

Indirect Evaporative Cooling Apparatus patent-application, September 2011

Methods and Systems for Desiccant Air Conditioning Using Photovoltaic-Thermal (PVT) Modules patent-application, May 2012

Desiccant Air Conditioning Methods and Systems Using Evaporative Chiller patent-application, May 2012

Methods and Systems for Desiccant Air Conditioning patent-application, May 2012

Heat Exchanger and Associated Methods patent-application, May 2012

Methods and Systems for Desiccant Air Conditioning patent-application, May 2012

Air Conditioning System with Integrated Solar Inverter patent-application, May 2012

Methods and Systems for Desiccant Air Conditioning patent-application, May 2012

Desalination Methods and Systems patent-application, May 2012

Methods for removing heat from enclosed spaces with high internal heat generation patent-application, July 2012

Methods and Systems for Desiccant Air Conditioning Using Fluids Heated or Cooled by a Solar Thermal System patent-application, July 2012

Evaporative Induction Cooling patent-application, January 2013

Indirect Evaporative Cooler Using Membrane-Contained Liquid Desiccant for Dehumidification and Flocked Surfaces to Provide Coolant Flow patent-application,

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

Desiccant Enhanced Evaporative Air-Conditioning (DEVap): Evaluation of a New Concept in Ultra Efficient Air Conditioning report, January 2011

Development and Analysis of Desiccant Enhanced Evaporative Air Conditioner Prototype report, April 2012

A Novel Air Conditioning System journal, October 2000

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

Solar collector for heating a fluid
patent, September 1980

Heat transfer pack
patent, April 1981

Hair dryer
patent, December 1983

Combination direct and indirect evaporative media
patent, October 1985

Indirect evaporative cooling system
patent, May 1989

Apparatus for indirect evaporative gas cooling
patent, December 1990

Low-flow internally-cooled liquid-desiccant absorber
patent, October 1994

Indirect contact chiller air-precooler method and apparatus
patent, February 1995

Method and apparatus for latent heat extraction
patent, February 1996

Heat exchange assembly
patent, June 1997

Thermally regenerated desiccant air conditioner with indirect evaporative cooler
patent, January 1999

System for monitoring outdoor heat exchanger coil
patent, January 1999

Desiccant/evaporative cooling system
patent, January 2001

Liquid desiccant air conditioner
patent, April 2001

Desiccant-containing stopper
patent, June 2001

Dehumidifier/air-conditioning system
patent, December 2002

Method and apparatus of indirect-evaporation cooling
patent, December 2002

Dehumidification using desiccants and multiple effect evaporators
patent, February 2003

Dehumidification process and apparatus
patent, April 2003

Control system for gas turbine inlet-air water-saturation and supersaturation system
patent, October 2003

Enthalpy pump
patent, February 2004

Modularized power supply
patent, May 2004

Membrane desiccation heat pump
patent, May 2004

Crosslinked polymer electrolyte membranes for heat and moisture exchange devices
patent, January 2005

Method of evaporative cooling of a fluid and apparatus therefor
patent, February 2005

Method and plate apparatus for dew point evaporative cooler
patent, April 2007

Versatile dehumidification process and apparatus
patent, July 2010

Evaporative cooler, heat recovery device, and ventilation device
patent, August 2011

Indirect evaporative cooler using membrane-contained, liquid desiccant for dehumidification
patent, July 2014

Method and apparatus of indirect-evaporation cooling
patent-application, April 2002

Method and apparatus of indirect-evaporation cooling
patent-application, January 2003

Method of evaporative cooling of a fluid and apparatus therefor
patent-application, February 2003

Heat and moisture exchange device
patent-application, June 2003

Indirect evaporative cooling mechanism
patent-application, April 2004

Dehumidifier/Air-conditioning System
patent-application, June 2004

Cooling/heating system of air conditioner
patent-application, July 2004

Systems and methods for conditioning air and transferring heat and mass between airflows
patent-application, May 2005

Indirect evaporative cooling of a gas using common product and working gas in a partial counterflow configuration
patent-application, September 2005

Crosslinked polymer electrolyte membranes for heat, ion and moisture exchange devices
patent-application, September 2005

Self-powered evaporative cooler
patent-application, March 2007

Multi-stage Hybrid Evaporative Cooling System
patent-application, May 2007

Anti-Reflection Etching of Silicon Surfaces Catalyzed with Ionic Metal Solutions
patent-application, September 2009

Solar-assisted climate control system
patent-application, January 2010

Enhanced HVAC System and Method
patent-application, February 2010

Process for Preparing Isocyanates
patent-application, February 2010

Process for Structuring Silicon
patent-application, April 2010

Metal-Assisted Chemical Etching of Substrates
patent-application, September 2010

Molecule Sulfonation Process
patent-application, October 2010

Indirect Evaporative Cooler Using Membrane-Contained, Liquid Desiccant for Dehumidification
patent-application, December 2010

Water distillation method and apparatusfor indirect evaporative coolers
patent-application, May 2011

High Efficiency Heat Exchanger and Dehumidifier
patent-application, May 2011

System and Methods for Cooling Data Centers and Other Electronic Equipment
patent-application, August 2011

Indirect Evaporative Cooling Apparatus
patent-application, September 2011

Methods and Systems for Desiccant Air Conditioning Using Photovoltaic-Thermal (PVT) Modules
patent-application, May 2012

Desiccant Air Conditioning Methods and Systems Using Evaporative Chiller
patent-application, May 2012

Methods and Systems for Desiccant Air Conditioning
patent-application, May 2012

Heat Exchanger and Associated Methods
patent-application, May 2012

Methods and Systems for Desiccant Air Conditioning
patent-application, May 2012

Air Conditioning System with Integrated Solar Inverter
patent-application, May 2012

Methods and Systems for Desiccant Air Conditioning
patent-application, May 2012

Desalination Methods and Systems
patent-application, May 2012

Methods for removing heat from enclosed spaces with high internal heat generation
patent-application, July 2012

Methods and Systems for Desiccant Air Conditioning Using Fluids Heated or Cooled by a Solar Thermal System
patent-application, July 2012

Evaporative Induction Cooling
patent-application, January 2013

Indirect Evaporative Cooler Using Membrane-Contained Liquid Desiccant for Dehumidification and Flocked Surfaces to Provide Coolant Flow
patent-application,

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

Desiccant Enhanced Evaporative Air-Conditioning (DEVap): Evaluation of a New Concept in Ultra Efficient Air Conditioning
report, January 2011

Development and Analysis of Desiccant Enhanced Evaporative Air Conditioner Prototype
report, April 2012

A Novel Air Conditioning System
journal, October 2000

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