On-line monitoring of heat transfer coefficients in a stirred tank from the signatures of the resultant force on a submerged body / J.B. Laurindo in International journal of refrigeration, Vol. 33 N° 3 (Mai 2010)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 33 N° 3 (Mai 2010) . - pp. 600-606 Titre : On-line monitoring of heat transfer coefficients in a stirred tank from the signatures of the resultant force on a submerged body Titre original : Suivi en ligne des coefficients de transfert de chaleur dans un bac sous agitation grâce aux forces agissant sur un objet submergé Type de document : texte imprimé Auteurs : J.B. Laurindo, Auteur ; B. A. M. Carciofi, Auteur ; R. Silva, Auteur Année de publication : 2010 Article en page(s) : pp. 600-606 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Process Cooling Immersion Tank Measurement Heat transfer coefficient Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A new procedure for on-line monitoring of heat transfer coefficients (h) during immersion cooling is presented. The signature of the resultant force acting on a sphere connected to a load cell by a rigid rod and immersed in a stirred tank was used as an indirect measurement of h. Temperature evolutions over time of the sphere initially at 40 °C, immersed in water at 1 °C, were used to determine h at different positions in a tank. The standard deviation (sd) of the resultant force was used as a measurement of force oscillations (force signature). The results indicated that it is possible to estimate h between sphere and water from the force signature. For a given spatial positions in the tank, a transfer function with correlation coefficients up to 0.98 was observed when a logarithm function was used to correlate h with sd of the normalized resultant force on the sphere. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002084 [article] On-line monitoring of heat transfer coefficients in a stirred tank from the signatures of the resultant force on a submerged body = Suivi en ligne des coefficients de transfert de chaleur dans un bac sous agitation grâce aux forces agissant sur un objet submergé [texte imprimé] / J.B. Laurindo, Auteur ; B. A. M. Carciofi, Auteur ; R. Silva, Auteur . - 2010 . - pp. 600-606. Génie Civil Langues : Anglais (eng) in International journal of refrigeration > Vol. 33 N° 3 (Mai 2010) . - pp. 600-606 Mots-clés : Process Cooling Immersion Tank Measurement Heat transfer coefficient Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : A new procedure for on-line monitoring of heat transfer coefficients (h) during immersion cooling is presented. The signature of the resultant force acting on a sphere connected to a load cell by a rigid rod and immersed in a stirred tank was used as an indirect measurement of h. Temperature evolutions over time of the sphere initially at 40 °C, immersed in water at 1 °C, were used to determine h at different positions in a tank. The standard deviation (sd) of the resultant force was used as a measurement of force oscillations (force signature). The results indicated that it is possible to estimate h between sphere and water from the force signature. For a given spatial positions in the tank, a transfer function with correlation coefficients up to 0.98 was observed when a logarithm function was used to correlate h with sd of the normalized resultant force on the sphere. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700709002084

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