Optimization of heat exchange in magnetic refrigerators and thermomagnetic motors

Optimization of heat exchange in magnetic refrigerators and thermomagnetic motors

Author Bessa, Carlos Vinícius Xavier Google Scholar
Ferreira, Lucas Diego Rodrigues Google Scholar
Gama, Sergio Autor UNIFESP Google Scholar
Santos, T. Google Scholar
Amaral, João S. Google Scholar
Costa, V. A. F. Google Scholar
Amaral, Vitor S. Google Scholar
Horikawa, Oswaldo Google Scholar
Abstract The power and efficiency of magnetic refrigerators and thermomagnetic motors depend on their operating frequencies. To improve the efficiency of these machines, it is necessary to design the regenerators/heat exchangers so to present heat transfer as high as possible, allowing higher operational frequencies. In several machines, a fluid flowing through internal channels promotes the heat transfer. In such cases, as the temperature difference governing heat transfer decreases along the channels length, the heat transfer also decreases. One solution for this problem is the use of non-linear heat transfer area increase along the channels. That can be done by changing the cross section area or the profile of the channels. This study presents an experimental analysis that shows the effectiveness of this technique by comparing heat exchangers with cylindrical, conical and non-prismatic shaped internal channels using infrared thermography.
Keywords Heat Transfer
Magnetocaloric Refrigeration
Thermomagnetic Motors
Thermography Analysis
Language English
Sponsor Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2012/09486-0]
Grant number FAPESP: 2012/09486-0
Date 2016
Published in 7th International Conference On Magnetic Refrigeration At Room Temperature. Paris, p. 154-157, 2016.
ISSN 0151-1637 (Sherpa/Romeo, impact factor)
Publisher Revista De Saude Publica
Extent 154-157
Origin http://dx.doi.org/10.18462/iir.thermag.2016.0145
Access rights Closed access
Type Conference paper
Web of Science ID WOS:000402542400038
URI http://repositorio.unifesp.br/handle/11600/49238

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