Air Conditioning with Magnetic Refrigeration

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Milwaukee, Wisconsin
Project Term:
09/01/2010 - 04/30/2014

Technology Description:

Astronautics Corporation of America is developing an air conditioning system that relies on magnetic fields. Typical air conditioners use vapor compression to cool air. Vapor compression uses a liquid refrigerant to circulate within the air conditioner, absorb the heat, and pump the heat out into the external environment. Astronautics' design uses a novel property of certain materials, called "magnetocaloric materials", to achieve the same result as liquid refrigerants. These magnetocaloric materials essentially heat up when placed within a magnetic field and cool down when removed, effectively pumping heat out from a cooler to warmer environment. In addition, magnetic refrigeration uses no ozone-depleting gases and is safer to use than conventional air conditioners, which are prone to leaks.

Potential Impact:

If successful, Astronautics' magnetic refrigeration could improve the efficiency of air conditioners without using refrigerants.


Increased energy efficiency would decrease U.S. energy demand and reduce reliance on fossil fuels—strengthening U.S. energy security.


Refrigerants with polluting emissions could account for up to 10%-20% of global warming by year 2050. Astronautics' technology could eliminate the use of these refrigerants.


Widespread adoption of this technology could reduce energy consumption for building air conditioning—providing consumers with cost savings on energy bills.


ARPA-E Program Director:
Dr. Dane Boysen
Project Contact:
Steve L. Russek
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