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Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators in Revue internationale du froid, Vol. 34, issue 2 (Mars 2011)
[article]
in Revue internationale du froid > Vol. 34, issue 2 (Mars 2011) . - pp. 484-497
Titre : Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators : Evaporateurs à écoulement accéléré : transfert de chaleur côté air et caractéristiques de la chute de pression Type de document : texte imprimé Année de publication : 2011 Article en page(s) : pp. 484-497 Langues : Anglais (eng) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : TRANSFERT THERMIQUE ECHANGEUR DE CHALEUR EVAPORATEUR COEFFICIENT DE TRANSFERT DE CHALEUR REFRIGERATION Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur [article] Air-side heat transfer and pressure drop characteristics of accelerated flow evaporators : Evaporateurs à écoulement accéléré : transfert de chaleur côté air et caractéristiques de la chute de pression [texte imprimé] . - 2011 . - pp. 484-497.
Langues : Anglais (eng)
in Revue internationale du froid > Vol. 34, issue 2 (Mars 2011) . - pp. 484-497
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : TRANSFERT THERMIQUE ECHANGEUR DE CHALEUR EVAPORATEUR COEFFICIENT DE TRANSFERT DE CHALEUR REFRIGERATION Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Air velocity characteristics within vented pallets loaded in a refrigerated vehicle with and without air ducts in Revue internationale du froid, vol 32, Issue 2 (2009)
[article]
in Revue internationale du froid > vol 32, Issue 2 (2009) . - pp. 220-234
Titre : Air velocity characteristics within vented pallets loaded in a refrigerated vehicle with and without air ducts Titre original : Caractéristiques de la vitesse de l'écoulement d'air à l'intérieur de palettes munies de ventilation chargées à bord d'un véhicule frigorifique avec ou sans gaines d'air Type de document : texte imprimé Année de publication : 2011 Article en page(s) : pp. 220-234 Langues : Anglais (eng) Français (fre) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Transport frigorifique Palette Modélisation Dynamique numérique des fluides Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : During transport using refrigerated vehicles, this being a vital link in the cold chain, the maintaining of even temperature throughout the cargo is essential in order to preserve the quality, safety and shelf life of perishable food. Within the refrigerated container, the temperature level and its homogeneity are directly governed by airflow patterns. The design of the air-distribution system should allow these airflows to compensate heat fluxes exchanged through the insulated walls or generated by the products.
In this paper, a reduced-scale model and CFD predictions were used to investigate experimentally and numerically the airflow patterns within a typical refrigerated truck configuration loaded with vented pallets filled with spherical objects. The experiments were carried out using a laser Doppler velocimetry and thermal sphere-shaped probes located inside the pallets. The aim was to investigate air velocity characteristics above and within pallets. The performance of ventilation was characterized with and without supply air duct systems. Both configurations are extensively used in refrigerated transport. Full-scale measurements were also performed within a load of fruit during transport in a refrigerated truck in order to evaluate the temperature distribution under given operating conditions.
The numerical modelling of airflow was performed using the computational fluid dynamics (CFD) fluent code and the Reynolds Stress Model (RSM) turbulence model. Numerical and experimental data make it possible to evaluate the air ventilation levels and their heterogeneity between the pallets. The numerical predictions show reasonable agreement with experimental data. The studied supply air duct system improves significantly the homogeneity of ventilation in the vehicle.[article] Air velocity characteristics within vented pallets loaded in a refrigerated vehicle with and without air ducts = Caractéristiques de la vitesse de l'écoulement d'air à l'intérieur de palettes munies de ventilation chargées à bord d'un véhicule frigorifique avec ou sans gaines d'air [texte imprimé] . - 2011 . - pp. 220-234.
Langues : Anglais (eng) Français (fre)
in Revue internationale du froid > vol 32, Issue 2 (2009) . - pp. 220-234
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Transport frigorifique Palette Modélisation Dynamique numérique des fluides Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : During transport using refrigerated vehicles, this being a vital link in the cold chain, the maintaining of even temperature throughout the cargo is essential in order to preserve the quality, safety and shelf life of perishable food. Within the refrigerated container, the temperature level and its homogeneity are directly governed by airflow patterns. The design of the air-distribution system should allow these airflows to compensate heat fluxes exchanged through the insulated walls or generated by the products.
In this paper, a reduced-scale model and CFD predictions were used to investigate experimentally and numerically the airflow patterns within a typical refrigerated truck configuration loaded with vented pallets filled with spherical objects. The experiments were carried out using a laser Doppler velocimetry and thermal sphere-shaped probes located inside the pallets. The aim was to investigate air velocity characteristics above and within pallets. The performance of ventilation was characterized with and without supply air duct systems. Both configurations are extensively used in refrigerated transport. Full-scale measurements were also performed within a load of fruit during transport in a refrigerated truck in order to evaluate the temperature distribution under given operating conditions.
The numerical modelling of airflow was performed using the computational fluid dynamics (CFD) fluent code and the Reynolds Stress Model (RSM) turbulence model. Numerical and experimental data make it possible to evaluate the air ventilation levels and their heterogeneity between the pallets. The numerical predictions show reasonable agreement with experimental data. The studied supply air duct system improves significantly the homogeneity of ventilation in the vehicle.An analytical prediction for performance and optimum design analysis of porous fins in Revue internationale du froid, Vol. 34, issue 1 (Jan 2011)
[article]
in Revue internationale du froid > Vol. 34, issue 1 (Jan 2011) . - pp. 337-352
Titre : An analytical prediction for performance and optimum design analysis of porous fins Titre original : Prévision, analytique de la performance et la conception optimale d'ailettes poreuses Type de document : texte imprimé Année de publication : 2011 Article en page(s) : pp. 337-352 Langues : Anglais (eng) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : TECHNIQUE DU FROID TRANSFERT DE CHALEUR ECHANGEUR DE CHALEUR AILETTE MILIEU POREUX Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur [article] An analytical prediction for performance and optimum design analysis of porous fins = Prévision, analytique de la performance et la conception optimale d'ailettes poreuses [texte imprimé] . - 2011 . - pp. 337-352.
Langues : Anglais (eng)
in Revue internationale du froid > Vol. 34, issue 1 (Jan 2011) . - pp. 337-352
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : TECHNIQUE DU FROID TRANSFERT DE CHALEUR ECHANGEUR DE CHALEUR AILETTE MILIEU POREUX Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur An application of the extended corresponding states model to thermodynamic property calculations for trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) in Revue internationale du froid, vol 33, Issue 5 (août 2010)
[article]
in Revue internationale du froid > vol 33, Issue 5 (août 2010) . - pp. 907-914
Titre : An application of the extended corresponding states model to thermodynamic property calculations for trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) Titre original : Application de l'extension d'un modèle d'états correspondants étendus pour le calcul des propriétés thermodynamiques du trans-1,3,3,3-tétrafluoropropène (HFO-1234ze[E]) Type de document : texte imprimé Année de publication : 2011 Article en page(s) : pp. 907-914 Langues : Anglais (eng) Français (fre) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Frigorigène Modélisation Propriété thermodynamique Équation d'état Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur [article] An application of the extended corresponding states model to thermodynamic property calculations for trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) = Application de l'extension d'un modèle d'états correspondants étendus pour le calcul des propriétés thermodynamiques du trans-1,3,3,3-tétrafluoropropène (HFO-1234ze[E]) [texte imprimé] . - 2011 . - pp. 907-914.
Langues : Anglais (eng) Français (fre)
in Revue internationale du froid > vol 33, Issue 5 (août 2010) . - pp. 907-914
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Frigorigène Modélisation Propriété thermodynamique Équation d'état Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur An approximate analytical prediction about thermal performance and optimum design of pin fins subject to condensation of saturated steam flowing under forced convection in Revue internationale du froid, vol 32, issue 5 (2009)
[article]
in Revue internationale du froid > vol 32, issue 5 (2009) . - pp. 809-825
Titre : An approximate analytical prediction about thermal performance and optimum design of pin fins subject to condensation of saturated steam flowing under forced convection Titre original : Prévision analytique approximative de la performance thermique et de la conception optimale des picots cylindriques assujettis à la condensation de vapeur d'eau saturée en écoulement en convection forcée Type de document : texte imprimé Année de publication : 2012 Article en page(s) : pp. 809-825 Langues : Anglais (eng) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Échangeur de chaleur; Surface augmentée; Ailette; Géométrie; Système à absorption; Condensation; Vapeur; Eau; Calcul; Transfert de chaleur; Optimisation; performance Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : An approximate analytical method has been suggested for solving the governing equation for horizontal pin fins subject to condensation while saturated steam flowing over its under laminar forced convection. Adomian decomposition method is used for determination of the temperature distribution, performance and optimum dimensions of pin fins with temperature dependent thermal conductivity under the condensation of steam on the fin surface. From the results, a significant effect on the temperature distribution in the fin and its performances are noticed with the variation in fin-geometric parameters and thermo-physical properties of saturated vapor. Next, a generalized scheme for optimization has been demonstrated in such a way that either heat-transfer duty or fin volume can be taken as a constraint. Finally, the curves for the optimum design have been generated for the variation of different thermo-physical and geometric parameters, which may be helpful to a designer for selecting an appropriate design condition. [article] An approximate analytical prediction about thermal performance and optimum design of pin fins subject to condensation of saturated steam flowing under forced convection = Prévision analytique approximative de la performance thermique et de la conception optimale des picots cylindriques assujettis à la condensation de vapeur d'eau saturée en écoulement en convection forcée [texte imprimé] . - 2012 . - pp. 809-825.
Langues : Anglais (eng)
in Revue internationale du froid > vol 32, issue 5 (2009) . - pp. 809-825
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Échangeur de chaleur; Surface augmentée; Ailette; Géométrie; Système à absorption; Condensation; Vapeur; Eau; Calcul; Transfert de chaleur; Optimisation; performance Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : An approximate analytical method has been suggested for solving the governing equation for horizontal pin fins subject to condensation while saturated steam flowing over its under laminar forced convection. Adomian decomposition method is used for determination of the temperature distribution, performance and optimum dimensions of pin fins with temperature dependent thermal conductivity under the condensation of steam on the fin surface. From the results, a significant effect on the temperature distribution in the fin and its performances are noticed with the variation in fin-geometric parameters and thermo-physical properties of saturated vapor. Next, a generalized scheme for optimization has been demonstrated in such a way that either heat-transfer duty or fin volume can be taken as a constraint. Finally, the curves for the optimum design have been generated for the variation of different thermo-physical and geometric parameters, which may be helpful to a designer for selecting an appropriate design condition. An experimental and numerical study on an inherent capacity modulated linear compressor for home refrigerators in Revue internationale du froid, vol.34, issue 6 (sept 2011)
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PermalinkAnalytical solution for the simultaneous heat and mass transfer problem in air washers in Revue internationale du froid, vol 34, issue 1 (janvier 2011)
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