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Heat transfer and viscous losses in micro-channel passive regenerators. 1. Apparatus and experimental results.

Author(s) : TURA A., SHOPFER S., ROWE A., et al.

Summary

The University of Victoria research group developed a passive regenerator test apparatus with the objective of obtaining the heat transfer coefficient and hydraulic losses of regenerator geometries suitable for active magnetic regenerator refrigerators. After initial tests with 1 mm diameter spheres new experiments have been conducted with a newly developed micro-channel type of regenerator manufactured with the collaboration of the Universita di Salerno through a laser sintering process. Each 23.5 mm diameter regenerator includes approximately 730 channels with a squared cross sectional area of 0.5 mm2. The test apparatus was modified to accommodate a Fiber Bragg Grating to read fluid temperature at five points equally spaced inside one of the micro-channel. Temperatures at the regenerator cold and hot inlet and of the solid regenerator were instead monitored by thermocouples. Measurements for a range of frequencies, fluid mass flow rate per cycle, and temperature spans were performed. See also this issue of the Bulletin, reference 2011-0193.

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Pages: 2010-4

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Details

  • Original title: Heat transfer and viscous losses in micro-channel passive regenerators. 1. Apparatus and experimental results.
  • Record ID : 2011-0192
  • Languages: English
  • Source: 4th International Conference on Magnetic Refrigeration at Room Temperature (Thermag IV). Proceedings: Baotou, China, August 23-27, 2010.
  • Publication date: 2010/08/23

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