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Academic literature on the topic 'Déshumidification'
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Journal articles on the topic "Déshumidification"
Chraibi, A., A. Jaffrin, S. Makhlouf, and N. Bentounes. "Déshumidification de l'air d'une serre par contact direct à courants croisés avec une solution hygroscopique organique." Journal de Physique III 5, no. 7 (1995): 1055–74. http://dx.doi.org/10.1051/jp3:1995177.
Full textDissertations / Theses on the topic "Déshumidification"
Saghir, Ba Mohammed Mohamed. "Modélisation numérique de la déshumidification de l'air humide dans les échangeurs de chaleur à tubes ailetés." Valenciennes, 2007. https://ged.uphf.fr/nuxeo/site/esupversions/a0ce7a06-8f0f-4d94-a61b-446f6cb24fdd.
Full textThis dissertation presents numerical simulations of humid airflow dehumidification in heat exchangers. In-house condensation routines have been developed and implemented into a CFD package. The use of these routines was required in order to predict the partial condensation of the water vapor contained in the humid air on the fin surfaces. Two different modeling approaches (single-phase and two-phases) of the humid air/condensate flow are considered. In a first step, the single-phase model was applied to a continuous plate-fins and tubes heat exchanger. Besides, it was applied to an independent circular-fins and tubes heat exchanger. The global mass and thermal numerical performances were obtained by means of the condensation model. Then, it was successfully compared with experimental data. The numerical analysis is complemented by an experimental study. Experimentations allow taking condensate distribution photographs on a simplified model of the plate-fins and tubes heat exchanger. The comparison between condensate distribution photographs and numerical results validates locally the current study. Numerical simulations are also used to analyze the relation and interaction between the air side flow topology and coupled heat and mass transfers. Finally, we describe the row by row evolution of mass and heat transfer for different inlet air velocities. In a second step, a two-phases modeling of the moist air flow throughout a two-dimensional channel geometry is presented. First results of the two-phases modeling of humid air flow showed very satisfactory global results compared to those of single-phase modeling
Vallières, Marise. "Comparaison de méthodes de refroidissement et de déshumidification pour une production en serre de tomates biologiques." Master's thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/29481.
Full textChrusciel, Laurent. "Étude de l'association d'une colonne d'absorption à un séchoir convectif à basse température : influence de l'absorbeur sur la cinétique et la qualité du chauffage." Vandoeuvre-les-Nancy, INPL, 1998. http://www.theses.fr/1998INPL069N.
Full textMakhlouf, Saïd. "Expérimentation et modélisation d'une serre solaire à stockage par chaleur latente assisté par pompe à chaleur de déshumidification." Nice, 1988. http://www.theses.fr/1988NICE4180.
Full textYang, Junhua. "Evaluation analytique et numérique de la performance du transfert de chaleur et de masse lors du refroidissement de l'air avec ou sans déshumidification sur une surface augmentée." Nancy 1, 2002. http://www.theses.fr/2002NAN10244.
Full textThis study consists of a mathematical modelling of heat and mass transfer for during the cooling of airflow over a fin-and-tube with or without condensation. The numerical simulation made it possible to obtain the distribution of velocity, the temperature and humidity of the airflow, and distribution of fin temperature and local efficiency, as well as the condensate flux and the sensitive and latent heat flux
Maalouf, Samer. "Étude et conception d'un système thermodynamique producteur du travail mécanique à partir d'une source chaude à 120°C." Thesis, Paris, ENMP, 2013. http://www.theses.fr/2013ENMP0074/document.
Full textLow-temperature waste-gas heat sources (< 120-150°C) exiting several industrial processes could be recovered for electricity production and constitute an effective mean to reduce primary energy consumption and carbon dioxide emissions. However, technical barriers such as low conversion efficiency, large needed heat transfer area, and the presence of chemically corrosive substances associated with high moisture content when operating in harsh environment impede their wider application. This thesis focuses on particularly energy-hungry industrial sectors characterized by presently unsolved challenges in terms of environmentally hostile low-temperature heat sources. Existing thermodynamic cycles based on Organic Rankine Cycle (ORC) are adapted and optimized for this temperature level. Two conventional heat recovery methods are studied more particularly: indirect and direct contact dehumidification. Optimized design methods for heat exchangers are elaborated and experimentally validated. For the indirect contact dehumidification, advanced anti-corrosion coated materials are proposed and laboratory tested. For the direct contact dehumidification, the effects of packing material and geometry on the corresponding hydraulic performances are underlined. Innovative thermodynamic cycles based on the liquid desiccant technology are investigated. An improved regeneration cycle (IRC) is developed. Compared to the conventional heat recovery technologies, the proposed “IRC” improves both net power and turbine expansion ratio besides preventing faced corrosions problems