Documents disponibles écrits par cet auteur

Approximation of transient 1D conduction in a finite domain using parametric fractional derivatives / Sergio M. Pineda in Journal of heat transfer, Vol. 133 N° 7 (Juillet 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 7 (Juillet 2011) . - pp. [071301/1-6] Titre : Approximation of transient 1D conduction in a finite domain using parametric fractional derivatives Type de document : texte imprimé Auteurs : Sergio M. Pineda, Auteur ; Gerardo Diaz, Auteur ; Carlos F. M. Coimbra, Auteur Année de publication : 2011 Article en page(s) : pp. [071301/1-6] Note générale : Physique Langues : Anglais (eng) Mots-clés : Heat  conduction  Finite  domain  Fractional  derivatives  Anamalous  diffusion Index. décimale : 536 Chaleur. Thermodynamique Résumé : A solution to the problem of transient one-dimensional heat conduction in a finite domain is developed through the use of parametric fractional derivatives. The heat diffusion equation is rewritten as anomalous diffusion, and both analytical and numerical solutions for the evolution of the dimensionless temperature profile are obtained. For large slab thicknesses, the results using fractional order derivatives match the semi-infinite domain solution for Fourier numbers, Fo[0,1/16]. For thinner slabs, the fractional order solution matches the results obtained using the integral transform method and Green's function solution for finite domains. A correlation is obtained to display the variation of the fractional order p as a function of dimensionless time (Fo) and slab thickness () at the boundary =0. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013300 [...] [article] Approximation of transient 1D conduction in a finite domain using parametric fractional derivatives [texte imprimé] / Sergio M. Pineda, Auteur ; Gerardo Diaz, Auteur ; Carlos F. M. Coimbra, Auteur . - 2011 . - pp. [071301/1-6]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 7 (Juillet 2011) . - pp. [071301/1-6] Mots-clés : Heat  conduction  Finite  domain  Fractional  derivatives  Anamalous  diffusion Index. décimale : 536 Chaleur. Thermodynamique Résumé : A solution to the problem of transient one-dimensional heat conduction in a finite domain is developed through the use of parametric fractional derivatives. The heat diffusion equation is rewritten as anomalous diffusion, and both analytical and numerical solutions for the evolution of the dimensionless temperature profile are obtained. For large slab thicknesses, the results using fractional order derivatives match the semi-infinite domain solution for Fourier numbers, Fo[0,1/16]. For thinner slabs, the fractional order solution matches the results obtained using the integral transform method and Green's function solution for finite domains. A correlation is obtained to display the variation of the fractional order p as a function of dimensionless time (Fo) and slab thickness () at the boundary =0. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JHTRAO00013300 [...]

Performance of an adiabatic cross-flow liquid-desiccant absorber inside a refrigerated warehouse / Sergio M. Pineda in International journal of refrigeration, Vol. 34 N° 1 (Janvier 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 138-147 Titre : Performance of an adiabatic cross-flow liquid-desiccant absorber inside a refrigerated warehouse Titre original : Performance d'un absorbeur à déshydratant liquide à écoulements croisés adiabatiques dans un entrepôt frigorifique Type de document : texte imprimé Auteurs : Sergio M. Pineda, Auteur ; Gerardo Diaz, Auteur Année de publication : 2011 Article en page(s) : pp. 138-147 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Cold  storage  Desiccant  Defrosting  Energy  consumption  Reduction  Moisture Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Liquid-desiccant systems have been extensively studied as a way of reducing the latent load on air conditioning systems. Most of the studies have targeted the removal of moisture from air at ambient conditions. The literature about the use of liquid desiccants in low temperature applications is scarce. In this study, a small-scale liquid-desiccant absorber is installed inside a commercial refrigerated warehouse. Its performance under realistic operating conditions inside a pre-cooling room is analyzed. The results show that the dew point temperature of the air downstream of the absorber is comparable to the evaporator surface temperature suggesting the potential to delay the formation of ice on the cooling coil. An internal heat exchanger is used to lower the temperature of the inlet liquid-desiccant flow to the absorber and the regeneration process is performed using only ambient air. The analysis of the reduction in water and energy consumption for a scaled-up system is also performed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001775 [article] Performance of an adiabatic cross-flow liquid-desiccant absorber inside a refrigerated warehouse = Performance d'un absorbeur à déshydratant liquide à écoulements croisés adiabatiques dans un entrepôt frigorifique [texte imprimé] / Sergio M. Pineda, Auteur ; Gerardo Diaz, Auteur . - 2011 . - pp. 138-147. Génie Mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 1 (Janvier 2011) . - pp. 138-147 Mots-clés : Cold  storage  Desiccant  Defrosting  Energy  consumption  Reduction  Moisture Index. décimale : 621.5 Energie pneumatique. Machinerie et outils. Réfrigération Résumé : Liquid-desiccant systems have been extensively studied as a way of reducing the latent load on air conditioning systems. Most of the studies have targeted the removal of moisture from air at ambient conditions. The literature about the use of liquid desiccants in low temperature applications is scarce. In this study, a small-scale liquid-desiccant absorber is installed inside a commercial refrigerated warehouse. Its performance under realistic operating conditions inside a pre-cooling room is analyzed. The results show that the dew point temperature of the air downstream of the absorber is comparable to the evaporator surface temperature suggesting the potential to delay the formation of ice on the cooling coil. An internal heat exchanger is used to lower the temperature of the inlet liquid-desiccant flow to the absorber and the regeneration process is performed using only ambient air. The analysis of the reduction in water and energy consumption for a scaled-up system is also performed. DEWEY : 621.5 ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700710001775