Bipolar pulse field for magnetic refrigeration
Abstract
A magnetic refrigeration apparatus includes first and second steady state magnets, each having a field of substantially equal strength and opposite polarity, first and second bodies made of magnetocaloric material disposed respectively in the influence of the fields of the first and second steady state magnets, and a pulsed magnet, concentric with the first and second steady state magnets, and having a field which cycles between the fields of the first and second steady state magnets, thereby cyclically magnetizing and demagnetizing and thus heating and cooling the first and second bodies. Heat exchange apparatus of suitable design can be used to expose a working fluid to the first and second bodies of magnetocaloric material. A controller is provided to synchronize the flow of working fluid with the changing states of magnetization of the first and second bodies.
- Inventors:
-
- Oak Ridge, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 869569
- Patent Number(s):
- 5357756
- Assignee:
- Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F25 - REFRIGERATION OR COOLING F25B - REFRIGERATION MACHINES, PLANTS OR SYSTEMS
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
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- bipolar; pulse; field; magnetic; refrigeration; apparatus; steady; magnets; substantially; equal; strength; opposite; polarity; bodies; magnetocaloric; material; disposed; respectively; influence; fields; pulsed; magnet; concentric; cycles; cyclically; magnetizing; demagnetizing; heating; cooling; heat; exchange; suitable; design; expose; fluid; controller; provided; synchronize; flow; changing; magnetization; magnetic refrigeration; bipolar pulse; opposite polarity; heat exchange; material disposed; substantially equal; refrigeration apparatus; pulse field; equal strength; pulsed magnet; /62/505/
Citation Formats
Lubell, Martin S. Bipolar pulse field for magnetic refrigeration. United States: N. p., 1994.
Web.
Lubell, Martin S. Bipolar pulse field for magnetic refrigeration. United States.
Lubell, Martin S. Sat .
"Bipolar pulse field for magnetic refrigeration". United States. https://www.osti.gov/servlets/purl/869569.
@article{osti_869569,
title = {Bipolar pulse field for magnetic refrigeration},
author = {Lubell, Martin S},
abstractNote = {A magnetic refrigeration apparatus includes first and second steady state magnets, each having a field of substantially equal strength and opposite polarity, first and second bodies made of magnetocaloric material disposed respectively in the influence of the fields of the first and second steady state magnets, and a pulsed magnet, concentric with the first and second steady state magnets, and having a field which cycles between the fields of the first and second steady state magnets, thereby cyclically magnetizing and demagnetizing and thus heating and cooling the first and second bodies. Heat exchange apparatus of suitable design can be used to expose a working fluid to the first and second bodies of magnetocaloric material. A controller is provided to synchronize the flow of working fluid with the changing states of magnetization of the first and second bodies.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}