| Titre : | On-line monitoring of heat transfer coefficients in a stirred tank from the signatures of the resultant force on a submerged body (2010) |
| Titre original : | Suivi en ligne des coefficients de transfert de chaleur dans un bac sous agitation grâce aux forces agissant sur un objet submergé |
| Auteurs : | J.B. Laurindo, Auteur ; B. A. M. Carciofi, Auteur ; R. Silva, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | International journal of refrigeration (Vol. 33 N° 3, Mai 2010) |
| Article en page(s) : | pp. 600-606 |
| Note générale : | Génie Civil |
| Langues : | Anglais |
| Index. décimale : | 621.5 (Energie pneumatique. Machinerie et outils. Réfrigération) |
| Tags : | Process Cooling Immersion Tank Measurement Heat transfer coefficient |
| 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 |
