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Auteur Masahiro Ikenaga |
Documents disponibles écrits par cet auteur (2)



Cooling characteristics of regenerative magnetic refrigeration with particle-packed bed / Tsuyoshi Kawanami in Journal of heat transfer, Vol. 133 N° 6 (Juin 2011)
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Titre : Cooling characteristics of regenerative magnetic refrigeration with particle-packed bed Type de document : texte imprimé Auteurs : Tsuyoshi Kawanami, Auteur ; Shigeki Hirano, Auteur ; Masahiro Ikenaga, Auteur Année de publication : 2011 Article en page(s) : pp. [060903/1-8] Note générale : Physique Langues : Anglais (eng) Mots-clés : Magnetic refrigeration Magnetocaloric effect Heat pump Regenerative cycle Index. décimale : 536 Chaleur. Thermodynamique Résumé : The aim of our study was to elucidate the fundamental cooling characteristics and to improve the cooling characteristics of a room-temperature magnetic refrigerator operated under an active magnetic regenerator (AMR) cycle. The AMR refrigeration cycle, which includes a thermal storage process and a regeneration process, is used to realize a practical magnetic refrigerator operating near room-temperature. The basic components of the target AMR system are a magnetic circuit, test section, fluid-displacing device, and associated instrumentation. Spherical gadolinium particles are packed in the test section as the magnetic working substance, and air and water are used as heat transfer fluids. The cooling characteristics of the target AMR system under various operating conditions are investigated. The results show that the AMR cycle is very effective in improving the cooling performance of the room-temperature magnetic refrigerator.
DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]
in Journal of heat transfer > Vol. 133 N° 6 (Juin 2011) . - pp. [060903/1-8][article] Cooling characteristics of regenerative magnetic refrigeration with particle-packed bed [texte imprimé] / Tsuyoshi Kawanami, Auteur ; Shigeki Hirano, Auteur ; Masahiro Ikenaga, Auteur . - 2011 . - pp. [060903/1-8].
Physique
Langues : Anglais (eng)
in Journal of heat transfer > Vol. 133 N° 6 (Juin 2011) . - pp. [060903/1-8]
Mots-clés : Magnetic refrigeration Magnetocaloric effect Heat pump Regenerative cycle Index. décimale : 536 Chaleur. Thermodynamique Résumé : The aim of our study was to elucidate the fundamental cooling characteristics and to improve the cooling characteristics of a room-temperature magnetic refrigerator operated under an active magnetic regenerator (AMR) cycle. The AMR refrigeration cycle, which includes a thermal storage process and a regeneration process, is used to realize a practical magnetic refrigerator operating near room-temperature. The basic components of the target AMR system are a magnetic circuit, test section, fluid-displacing device, and associated instrumentation. Spherical gadolinium particles are packed in the test section as the magnetic working substance, and air and water are used as heat transfer fluids. The cooling characteristics of the target AMR system under various operating conditions are investigated. The results show that the AMR cycle is very effective in improving the cooling performance of the room-temperature magnetic refrigerator.
DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire Investigation of the sliding behavior between steel and mortar for seismic applications in structures / Jason McCormick in Earthquake engineering structural dynamics, Vol. 38 N° 12 (Octobre 2009)
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[article]
Titre : Investigation of the sliding behavior between steel and mortar for seismic applications in structures Type de document : texte imprimé Auteurs : Jason McCormick, Auteur ; Nagae, Takuya, Auteur ; Masahiro Ikenaga Article en page(s) : pp. 1401-1419 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Friction steel Mortar Steel structures Shake table tests Seismic Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The friction developed between a steel base plate and a mortar base contributes shear resistance to the building system during a seismic event. In order to investigate the possible sliding behavior between the base plate and the mortar, a shake table study is undertaken using a large rigid mass supported by steel contact elements which rest on mortar surfaces connected to the shake table. Horizontal input accelerations are considered at various magnitudes and frequencies. The results provide a constant friction coefficient during sliding with an average value of approximately 0.78. A theoretical formulation of the friction behavior is also undertaken. The theoretical equations show that the sliding behavior is dependent on the ratio of the friction force to the input force. The addition of vertical accelerations to the system further complicates the sliding behavior as a result of the varying normal force. This results in a variable friction resistance which is a function of the amplitude, phase, and frequency of the horizontal and vertical input motions. In general, this study showed a consistent and reliable sliding behavior between steel and mortar. ISSN : 0098-8847 En ligne : www.interscience.wiley.com/journal/eqe
in Earthquake engineering structural dynamics > Vol. 38 N° 12 (Octobre 2009) . - pp. 1401-1419[article] Investigation of the sliding behavior between steel and mortar for seismic applications in structures [texte imprimé] / Jason McCormick, Auteur ; Nagae, Takuya, Auteur ; Masahiro Ikenaga . - pp. 1401-1419.
Génie Civil
Langues : Anglais (eng)
in Earthquake engineering structural dynamics > Vol. 38 N° 12 (Octobre 2009) . - pp. 1401-1419
Mots-clés : Friction steel Mortar Steel structures Shake table tests Seismic Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : The friction developed between a steel base plate and a mortar base contributes shear resistance to the building system during a seismic event. In order to investigate the possible sliding behavior between the base plate and the mortar, a shake table study is undertaken using a large rigid mass supported by steel contact elements which rest on mortar surfaces connected to the shake table. Horizontal input accelerations are considered at various magnitudes and frequencies. The results provide a constant friction coefficient during sliding with an average value of approximately 0.78. A theoretical formulation of the friction behavior is also undertaken. The theoretical equations show that the sliding behavior is dependent on the ratio of the friction force to the input force. The addition of vertical accelerations to the system further complicates the sliding behavior as a result of the varying normal force. This results in a variable friction resistance which is a function of the amplitude, phase, and frequency of the horizontal and vertical input motions. In general, this study showed a consistent and reliable sliding behavior between steel and mortar. ISSN : 0098-8847 En ligne : www.interscience.wiley.com/journal/eqe Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire