Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5017192 | International Journal of Refrigeration | 2016 | 24 Pages |
Abstract
In this first part of a two-part paper, a new active magnetic regenerator (AMR) laboratory apparatus is presented and evaluated. The setup is composed of a nested Halbach cylinder magnetic circuit (maximum magnetic flux density of 1.69 T) assembled in phase with a double effect displacer that provides the cold and hot blows to the regenerator. A single packed-bed regenerator with 195.5âg of gadolinium spheres is used in a discontinuous (i.e., reciprocating) cycle. The system performance is evaluated in terms of characteristic curves (i.e., cooling capacity as a function of temperature span), coefficient of performance and second-law efficiency as a function of the utilization factor and operating frequency. Maximum values of COP have been identified for a given temperature span. The maximum values of second-law efficiency were obtained at system temperature spans between 15 and 20âK.
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Engineering
Mechanical Engineering
Authors
Paulo V. Trevizoli, Alan T. Nakashima, Guilherme F. Peixer, Jader R. Jr.,