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Littérature scientifique sur le sujet « Température d’air »
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Articles de revues sur le sujet "Température d’air"
Benmansour, Abdeldjellil, et Mohammad Hamdan. « Simulation du Stockage de l'Energie Thermique dans un Lit Fixe de Sphères Contenant un Matériau à Changement de Phase ». Journal of Renewable Energies 4, no 2 (31 décembre 2001) : 125–34. http://dx.doi.org/10.54966/jreen.v4i2.1004.
Texte intégralSoualmi, Rabiaa, Abderrahmane Benbrik, Mohammed Cherifi, Denis Lemonnier et Siham Laouar-Meftah. « Etude numérique de la convection naturelle dans une enceinte rectangulaire en présence d’un gradient de température et une génération de chaleur interne ». Journal of Renewable Energies 21, no 3 (30 septembre 2018) : 403–13. http://dx.doi.org/10.54966/jreen.v21i3.700.
Texte intégralMagne, Laurent, Nicolas Lecoq, Joël Rodet, Stéphane Chédeville, Caroline Fournial et Jean-Pierre Viard. « Les inversions des circulations d’air dans une grotte de la craie à une entrée. Exemple de la grotte des Petites Dales (Normandie, France) ». Karstologia : revue de karstologie et de spéléologie physique 69, no 1 (2017) : 47–56. https://doi.org/10.3406/karst.2017.3115.
Texte intégralYoucef, Ahmed. « Simulation numérique du comportement dynamique et thermique d’un écoulement d’air à travers un canal muni des chicanes sous forme aile (Application aux capteurs solaires plans à air) ». Journal of Renewable Energies 20, no 3 (30 septembre 2017) : 521–29. http://dx.doi.org/10.54966/jreen.v20i3.646.
Texte intégralGodbane, Nadir, Youssef Benserai, Fouzia Ouarhlent et Azeddine Soudani. « Simulation numérique de la convection naturelle bidimensionnelle dans une cavité carrée différentiellement chauffée remplie d'air ». Journal of Renewable Energies 22, no 2 (6 octobre 2023) : 217–26. http://dx.doi.org/10.54966/jreen.v22i2.739.
Texte intégralDever, L., C. Marlin et P. Vachier. « Teneurs en2H,18O,3H et en chlorures des pluies dans le Nord-Est de la France (Châlons-sur-Marne) : relation avec la température et l’origine des masses d’air ». Geodinamica Acta 4, no 3 (janvier 1990) : 133–40. http://dx.doi.org/10.1080/09853111.1990.11105205.
Texte intégralSandoval Torres, Sadoth, Wahbi Jomaa, Françoise Marc et Jean-Rodolphe Puiggali. « Étude des altérations de la couleur du bois de Chêne lors du séchage sous vide discontinu ». Madera y Bosques 22, no 2 (19 septembre 2016) : 119. http://dx.doi.org/10.21829/myb.2016.2221329.
Texte intégralAssani, Ali A., Francis Lajoie, Marie-Ève Vadnais et Guillaume Beauchamp. « Analyse de l’influence de l’oscillation Arctique sur la variabilité interannuelle des précipitations dans le bassin versant de la rivière Saint-François (Québec, Canada) au moyen de la méthode des corrélations canoniques ». Revue des sciences de l'eau 21, no 1 (29 avril 2008) : 19–33. http://dx.doi.org/10.7202/017928ar.
Texte intégralKhadraoui, Mohamed Amine, et Leila Sriti. « Etude expérimentale du comportement thermique d’une façade ventilée dans un climat chaud et aride ». Journal of Renewable Energies 20, no 4 (31 décembre 2017) : 626–34. http://dx.doi.org/10.54966/jreen.v20i4.655.
Texte intégralDeprost, Raphaèle, Patrice Paul, Florent Vasbien et Joseph Kleinpeter. « Conditions météorologiques et épisodes de pollution par les particules fines en Alsace ». Pollution atmosphérique, NS 8 (1 mars 2015) : 115–34. http://dx.doi.org/10.54563/pollution-atmospherique.7895.
Texte intégralThèses sur le sujet "Température d’air"
Hamdi, Hiba. « Estimation des températures d’air en milieu urbain à l’aide de modèles physiques et de réseaux de neurones ». Electronic Thesis or Diss., Rennes 2, 2025. http://www.theses.fr/2025REN20003.
Texte intégralThis thesis is set within the context of climate change and its impacts on urban environments, focusing on the phenomenon of the UHI. The goal is to provide tools for identifying vulnerable areas to implement targeted measures, particularly through neighborhoodscale air temperature maps. This work introduces an innovative methodological framework that combines physical simulations and statistical approaches. The UWG model was employed to construct an urban air temperature database using rural data and surface parameters. A neural network-based model, NUWG-City, was developed. Pre-trained on simulations generated by UWG, it was finetuned using meteorological station data from Toulouse. This city, characterized by its diverse urban fabric and extensive meteorological records, enabled robust training and validation of the model. NUWG-City improves UWG’s performance by 30% and increases simulation speed by 33%, while providing better spatial variability by incorporating the specific characteristics of urban environments
Chaomuang, Nattawut. « Caractérisation expérimentale et modélisation des écoulements d’air et transferts thermiques dans un meuble frigorifique fermé ». Thesis, Paris, Institut agronomique, vétérinaire et forestier de France, 2019. http://www.theses.fr/2019IAVF0017/document.
Texte intégralThe use of closed refrigerated display cabinets in supermarkets has been increased steadily because of the potential energy savings compared to open ones. This growing trend has contributed to the necessity to expand research in the field of retail refrigeration. Most studies in literature, however, focused on the improvements of energy efficiency after door installation while studies on the mechanism of heat transfer and airflow within closed display cabinets are still limited. In fact, the airflow pattern influences the heat exchange between air and products, thus, product temperature. This PhD thesis aims to gain an insight into the mechanism of airflow and heat transfer in closed refrigerated display cabinets by the implementation of experimental and numerical approaches.Experimental investigations were conducted in a closed refrigerated display cabinet (an integral type with a single band air curtain and two double-glazing doors) located in a controlled-temperature test room. Air/product temperatures and air velocity are the main parameters taken into investigations. Eighty calibrated thermocouples distributed throughout the cabinet made it possible to observe the spatial and temporal evolutions of the air and product temperatures under different operating conditions. These conditions were ambient air temperature (15, 19, 24 and 29 °C), product-occupied volume (unloaded, half-loaded and full-loaded with test packages made of methylcellulose), door-opening frequency (0 - permanently closed, 10, 20, 40, 60 Openings Per Hour - OPH) and opening duration (15s and 30s). An automatic door opening system was developed and allowed to apply the opening regime as prescribed in the standard test (EN ISO 23953-2, 2015). The experiment was also conducted in an open configuration of the cabinet (doors were completely removed) to determine the benefits of the doors on the temperature performance. The results showed that when the doors were permanently closed, the temperature distribution in the cabinet was similar whatever the ambient temperatures and occupied-volume percentages – the highest temperature position at the front-top shelf and the lowest temperature position at the rear-bottom shelf. The temperature distribution changed when the doors were periodically or permanently open – the front of the middle shelf became the highest temperature position while the lowest temperature position remained at the rear-bottom shelf. However, the air and product temperatures in the cabinet with doors remained lower despite a very high door-opening frequency (i.e. 60 OPH, product temperatures at least 1.0 °C lower), compared to the case without doors.Air velocity measurement using a hot-wire anemometer at the front of the cabinet from the discharge to the return air grilles allowed to observe the shape of the air curtain, while the measurement in the rear duct allowed to quantify the air flow distribution over the perforated back panel of different shelves. The use of a Particle Image Velocimetry (PIV) technique allowed the characterization of the air curtain with higher spatial resolution and accuracy. The result showed a zone of air recirculation at the upper part of the cabinet where warm ambient air infiltration through the door gaps was also observed, leading to an increase in the air curtain temperature. A 2D-CFD k-ε turbulence model was developed to reproduce the main flow phenomena observed by PIV so that its influence on the internal temperature distribution can be examined.Finally, a simplified heat transfer model was developed based on a zonal approach in both static and dynamic regimes which permits, respectively, the predictions of time-averaged air and product temperatures and temperature fluctuations according to the on/off cycle of the compressor regulation. The dynamic model was solved with a spectral approach, thus the influence of different parameters on the damping of the temperature fluctuations can be identified
Lafaye, de Micheaux Téo. « Modélisation des écoulements d’air et des transferts de chaleur dans un camion frigorifique : Etude des performances d’un dispositif de rideau d’air innovant pour le maintien de la chaîne du froid et la réduction des pertes à l’ouverture des portes ». Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI057.
Texte intégralCold chain safety is a key parameter for urban distribution where the frequent door-opening induces a heat infiltration. In order to reduce heat and mass transfer, air curtain have recently been installed to protect the doorway of refrigerated truck. The aim of this work is to study this type of door insulation. Two CFD numerical models were developed to simulate the temperature and velocity fields in a closed refrigerated truck. These models showed that modifying the blowing velocity does not modify the air flow structure inside the cavity. Different air chutes were modelled. Numerical results demonstrate that the configuration with a convergent and an open duct strongly improves the air renewal. A numerical investigation was performed in order to study heat and mass infiltration rates during the opening. The infiltration flow rate is well predicted by the CFD model, except at the transition between both flow regimes. An experimental truck was equipped with an air curtain setup, composed by an ambient air jet, a cold air jet or a double jet. In parallel, a numerical CFD model was developed to study the influence of various parameters. Experimental and numerical results were found to be in good agreement. The maximum efficiency of the ambient air curtain is reached when the impact point of the jet occurs in the door plane at the ground level. This configuration is only relevant for short opening times. The double air curtain efficiently maintains the temperature homogeneity for short openings. The cold air curtain is the best configuration which strongly limits the temperature increase during the opening and allows important energy savings