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Title: CaloriSMART: Small-scale test-stand for rapid evaluation of active magnetic regenerator performance

Abstract

We report operation of a device designed specifically for rapid experimental evaluation of performance of magnetocaloric materials in different magnetic fields using a compact active magnetic regenerator bed with a total volume of approximately 5 mL. Other features of the system include digital control of the rotating-permanent-magnet field source and custom dual-opposed syringe pump that enable precise tuning and coupling of the flow profile and the magnetic field profile. Performance of the device is demonstrated for flow volumes between 1 and 4 mL (utilization from 0.48 to 1.9), maximum magnetic fields of 1.13 and 1.45 T, and applied cooling powers from 0 to 20 W at frequencies from 0.5 to 4 Hz. A regenerator comprised of 25 g of 200 µm spherical Gd powder reached temperature spans of 19.3 K under no applied cooling load and 2.6 K under the maximum applied cooling load of 20 W. The device also achieves a very high specific exergetic cooling power of 73 W L -1T -1. Results obtained at two different maximum magnetic fields in the same device suggest a powerful new scaling for regenerator performance: the exergetic power quotient. The exergetic power quotient shows a simple scaling of device cooling performancemore » with the amount of active material and the magnetic field strength. This suggests results from a small device correlate to expected performance of a larger regenerator, making the exergetic power quotient a well-suited parameter for evaluating functionality of active magnetic regenerators employing new magnetocaloric materials.« less

Authors:
 [1];  [1];  [1];  [2]
  1. Ames Lab., Ames, IA (United States)
  2. Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States). Dept. of Materials Science and Engineering
Publication Date:
Research Org.:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1569743
Alternate Identifier(s):
OSTI ID: 1564589
Report Number(s):
IS-J 10000
Journal ID: ISSN 0196-8904
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Energy Conversion and Management
Additional Journal Information:
Journal Volume: 199; Journal Issue: C; Journal ID: ISSN 0196-8904
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

Griffith, Lucas, Czernuszewicz, Agata, Slaughter, Julie, and Pecharsky, Vitalij. CaloriSMART: Small-scale test-stand for rapid evaluation of active magnetic regenerator performance. United States: N. p., 2019. Web. doi:10.1016/j.enconman.2019.111948.
Griffith, Lucas, Czernuszewicz, Agata, Slaughter, Julie, & Pecharsky, Vitalij. CaloriSMART: Small-scale test-stand for rapid evaluation of active magnetic regenerator performance. United States. doi:10.1016/j.enconman.2019.111948.
Griffith, Lucas, Czernuszewicz, Agata, Slaughter, Julie, and Pecharsky, Vitalij. Fri . "CaloriSMART: Small-scale test-stand for rapid evaluation of active magnetic regenerator performance". United States. doi:10.1016/j.enconman.2019.111948.
@article{osti_1569743,
title = {CaloriSMART: Small-scale test-stand for rapid evaluation of active magnetic regenerator performance},
author = {Griffith, Lucas and Czernuszewicz, Agata and Slaughter, Julie and Pecharsky, Vitalij},
abstractNote = {We report operation of a device designed specifically for rapid experimental evaluation of performance of magnetocaloric materials in different magnetic fields using a compact active magnetic regenerator bed with a total volume of approximately 5 mL. Other features of the system include digital control of the rotating-permanent-magnet field source and custom dual-opposed syringe pump that enable precise tuning and coupling of the flow profile and the magnetic field profile. Performance of the device is demonstrated for flow volumes between 1 and 4 mL (utilization from 0.48 to 1.9), maximum magnetic fields of 1.13 and 1.45 T, and applied cooling powers from 0 to 20 W at frequencies from 0.5 to 4 Hz. A regenerator comprised of 25 g of 200 µm spherical Gd powder reached temperature spans of 19.3 K under no applied cooling load and 2.6 K under the maximum applied cooling load of 20 W. The device also achieves a very high specific exergetic cooling power of 73 W L-1T-1. Results obtained at two different maximum magnetic fields in the same device suggest a powerful new scaling for regenerator performance: the exergetic power quotient. The exergetic power quotient shows a simple scaling of device cooling performance with the amount of active material and the magnetic field strength. This suggests results from a small device correlate to expected performance of a larger regenerator, making the exergetic power quotient a well-suited parameter for evaluating functionality of active magnetic regenerators employing new magnetocaloric materials.},
doi = {10.1016/j.enconman.2019.111948},
journal = {Energy Conversion and Management},
number = C,
volume = 199,
place = {United States},
year = {2019},
month = {11}
}

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