A TEST STAND TO MEASURE THE MAGNETIZATION WORK OF MAGNETOCALORIC MATERIALS

Author(s)

Ferreira, L. D. R. ; Bessa, C. V. X. ; Gama, S. ; Horikawa, O. . ; Sandeman, K ; Bruck, E ; LoBue, M ; Barbosa, J ; KedousLebouc, A ; Rowe, A

• Document type: Journal article
• Source: 7TH INTERNATIONAL CONFERENCE ON MAGNETIC REFRIGERATION AT ROOM TEMPERATURE; v. N/A, p. 4-pg., 2016-01-01.

Abstract

The experimental apparatus presented in this study is capable of precisely measuring the magnetic force produced by a permanent magnets assembly over a magnetocaluric material at a regulated temperature. This data is then used to calculate the magnetization work necessary to bring the given magnetocaloric sample from zero field up to a 1 T field region over a given magnetic field gradient, for a range of temperatures around the Curie temperature of the material. This magnetization work can be used to compare different magnctocaloric materials, as well as to validate analytic methods to estimate the magnetization work of real applications in magnetic refrigeration, and thermomagnetic motors. Construction details of the test stand are presented as well as results for Gadolinium (Gd) and Manganese Arsenide (MnAs). (AU)

• FAPESP's process: 12/09486-0 - Development of tesla thermomagnetic motors running on solar energy or industrial heat rejects: part II
• Grantee: Sergio Gama
• Support Opportunities: Regular Research Grants