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A sample of publications:<\/span><\/p>\n [\/et_pb_text][et_pb_accordion admin_label=”Accordion” _builder_version=”3.0.87″ use_border_color=”off” border_color=”#ffffff” border_style=”solid”][et_pb_accordion_item title=”Active magnetic regenerator performance enhancement using passive magnetic materials” open=”on” _builder_version=”3.0.47″]<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”Active magnetic regenerators: performance in the vicinity of para-ferromagnetic second order phase transitions” _builder_version=”3.0.47″ open=”off”]<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”Magnetic heat pumps: an overview of design principles and challenges” _builder_version=”3.0.47″ open=”off”]<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”Performance evaluation of two-layer active magnetic regenerators with second-order magnetocaloric materials” _builder_version=”3.0.47″ open=”off”]<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”Modeling of thermo-magnetic phenomena in active magnetic regenerators” _builder_version=”3.0.47″ open=”off”]<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”AMR thermodynamics: Semi-analytic modeling” _builder_version=”3.0.47″ open=”off”]<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”An apparatus to measure heat transfer and viscous losses in thermal regenerators” _builder_version=”3.0.47″ open=”off”]<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”An overview of operating experience using the AMR test apparatus” _builder_version=”3.0.47″ open=”off”]<\/p>\n [\/et_pb_accordion_item][et_pb_accordion_item title=”Concentric Halbach cylinder magnetic refrigerator cost optimization” _builder_version=”3.0.47″ open=”off”]<\/p>\n
\nstrengths of less than 2T, and more practically less than 1.5 T. In this range, the useful
\nmagnetocaloric effect is less than 6K and limits the cooling power of active magnetic
\nregenerator (AMR) devices. Maximizing the useful magnetocaloric effect is critical in
\nenabling commercially viable permanent magnet devices, and methods of increasing the net
\nchange in magnetic field would be beneficial. It has been shown [O. Peksoy, A. Rowe, J. …<\/b><\/div>\nQuote this paper in BibTeX<\/span><\/span><\/h3>\n\t\t\t\t\t
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\nfor the development of heat pumps and cooling systems for applications around room
\ntemperature. In the open literature numerous works can be found in which much effort has
\nbeen put on the development of magnetocaloric materials, magnetic circuits and prototypes.
\nIn this paper we discuss some of the main challenges encountered in the literature and how
\ndesign choices impact cooling power and work requirements from a system engineering …<\/b><\/div>\n<\/div>\n
\nin an active magnetic regenerator (AMR) cycle for application near room temperature. One
\nmethod of improving AMR performance is to layer regenerators with spatially varying Curie
\n(or transition) temperatures. To study the impact of layering on AMR performance, four
\nregenerator compositions comprised of two-layers are experimentally tested with interface
\ntemperature measurements. Each regenerator uses Gd as the layer with the highest Curie …<\/b><\/div>\n<\/div>\n
\nBrayton cooling cycle. It consists of a porous matrix heat exchanger whose solid phase is a
\nmagnetocaloric material (solid refrigerant) that undergoes a reversible magnetic phase
\ntransition when subjected to a changing magnetic field. The cooling capacity of the cycle is
\nproportional to the mass of solid refrigerant, operating frequency, volumetric displacement of
\nthe working fluid (generally an aqueous solution) and regenerator effectiveness. AMRs …<\/b><\/div>\n<\/div>\n
\ndescribing active magnetic regenerators used as refrigerators. Numerical methods to
\ncalculate these parameters efficiently and accurately are needed. This paper proposes a set
\nof semi-analytic relationships to determine cooling power and magnetic work as a function of
\ntemperature span, regenerator characteristics, operating conditions, and magnetic field
\nwaveform. Appropriate effective values for magnetocaloric effect and specific heat are …<\/b><\/div>\n<\/div>\nQuote this paper in BibTeX<\/span><\/span><\/h3>\n\t\t\t\t\t
\nthermal systems. In refrigeration, they can be used as passive storage devices, such as in
\nStirling coolers, or as active magnetic regenerators in magnetocaloric refrigerators. In either
\ncase, the performance of the cooling system is influenced by the regenerator effectiveness
\nand by viscous losses. A laboratory passive regenerator apparatus was developed with the
\nobjective of measuring viscous losses and heat transfer effectiveness, using water as a …<\/b><\/div>\n<\/div>\nQuote this paper in BibTeX<\/span><\/span><\/h3>\n\t\t\t\t\t
\ninvestigated by the authors in the hopes of creating compact and efficient devices for the
\nliquefaction of cryofuels. In the past, progress has been hindered by a lack of understanding
\nas to how one creates an effective AMR. Measurements of the thermodynamic properties of
\npotential refrigerants were found to be insufficient and dynamic tests of materials undergoing
\nan AMR cycle were needed. To address this need, an AMR Test Apparatus was …<\/b><\/div>\n<\/div>\nQuote this paper in BibTeX<\/span><\/span><\/h3>\n\t\t\t\t\t
\nchallenges and high costs. Although several laboratory devices have been developed, no
\ndesign is realistically close to the performance, reliability, and financial proposition of a
\nvapor compression refrigerator.<\/div>\n<\/div>\n<\/div>\n