Contribution à l'étude de l'effusivité thermique PDF Download
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Author: Jacques Bransier
Publisher:
ISBN:
Category :
Languages : fr
Pages : 94
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Book Description
Author: Jacques Bransier
Publisher:
ISBN:
Category :
Languages : fr
Pages : 94
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Book Description
Author: Alain Degiovanni
Publisher:
ISBN:
Category :
Languages : fr
Pages : 319
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Author: Karl Zankel
Publisher:
ISBN:
Category :
Languages : fr
Pages : 50
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Author: Claude Klapisz
Publisher:
ISBN:
Category :
Languages : fr
Pages : 132
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Author: Karl Zankel
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Author: Nour-Eddine Sahraoui
Publisher:
ISBN:
Category :
Languages : fr
Pages : 147
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Nouveau modèle approché permettant de simuler avec une bonne précision le comportement thermique de locaux en régime transitoire dans des conditions d'environnement restrictives. Utilisation de la méthode du formalisme matriciel pour l'analyse du transfert thermique en régime variable dans les parois multicouches à constantes réparties. Le modèle est établi à partir d'hypothèses simplificatrices . On montre que la puissance thermique fourni est à chaque instant réparti, en première approximation, proportionnellement aux modules des admittances thermiques régime sinusoïdal et aux réponses temporelles régime impulsionnel. Étude expérimentale sur un modèle de grand volume 14m(3) montrant le rôle important de l'effusivité des premiers matériaux dans les échanges thermiques intérieurs et dans la consommation d'énergie (régime transitoire) et le rôle important des isolants dans le rayonnement.
Author: A. Nicolaus
Publisher:
ISBN:
Category :
Languages : fr
Pages : 142
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Author:
Publisher: Ed. Techniques Ingénieur
ISBN:
Category :
Languages : fr
Pages : 12
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Author:
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ISBN:
Category :
Languages : fr
Pages : 0
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Author: Bozidar Liscic
Publisher: Springer Science & Business Media
ISBN: 366201596X
Category : Technology & Engineering
Languages : en
Pages : 499
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Book Description
Heat treatment of metallic alloys constitutes an important step within the production process. The heat treatment process itself is considered as a cycle of heating the workpieces to a predetermined temperature, keeping them at this temperature for the time period required, and cooling them to room temperature in an appropriate way. The process of heating and keeping workpieces at the required temperature is now adays weil mastered and mostly automatized. The process of cooling or quenching which determines actually the resulting properties, is handicapped with many physical and technical uncertainties. Good results can already be obtained predominantly by using empirically based practice. But increased demands on the properties of the pro ducts as weIl as demands on safety and environment conditions of the quenching media require efforts to investigate the details of the quenching process and to transfer the results of the research to practical application. Advances in the knowledge about quenching processes have been achieved by modem applied thermodynamics especially by the heat and mass transfer researches; further the application of computer technology was helpful to new approaches in quenching pro cesses. Special emphases has been given to: - The theory of heat transfer and heat exchange intensification during quenching - Wetting kinematics - Residual stresses after quenching - Determination of the quenching intensity - Prediction of microstructural transformation and hardness distribution after quenching, the latter with some limitations.
