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Статті в журналах з теми "Fluides caloporteurs – Propriétés thermiques":
MARVILLET, Christophe. "Fluides caloporteurs - Propriétés." Thermique pour l’industrie, July 2015. http://dx.doi.org/10.51257/a-v2-be9571.
MARVILLET, Christophe. "Fluides caloporteurs - Propriétés." Thermique pour l’industrie, January 2003. http://dx.doi.org/10.51257/a-v1-be9571.
Дисертації з теми "Fluides caloporteurs – Propriétés thermiques":
Nessakh, Fatima Zohra. "Étude de nouveaux fluides de travail constitués de solvants à eutectique profond pour les pompes à chaleur." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0262.
A significant amount of waste heat is generated and rejected by industrial processes. This waste heat at low temperature can be upgraded using absorption heat transformers. Absorption heat thermo-transformers use conventional working fluids such as {water + lithium bromide} or {ammonia + water} systems. Nevertheless, the use of these working pairs in the processes has certain drawbacks such as corrosivity, toxicity or even crystallization. Other working fluids consisting of ionic liquid have also been considered. However, these solvents show significant toxicity and high costs. This study aims to evaluate the performance of working fluids consisting of a deep eutectic solvent (DES) and water in absorption heat thermo-transformers. The liquid-vapor equilibria of five {H2O + DES} systems as well as their thermophysical properties such as density, molar heat capacity and excess molar enthalpy were measured. This experimental work made it possible to develop empirical correlations and to adjust the parameters of the NRTL model in order to characterize the working fluids studied at any point of the absorption heat thermo-transformer. Simulations indicate that the working fluids {H2O + DES} have a performance close to {H2O + LiBr} mixture and they could be an alternative to traditional working fluids
Lataoui, Zied Petit Daniel Bertin Yves Jemni Abdelmajid. "Contribution à l'étude des transferts thermiques au sein des caloducs rainurés identification de la position du front d'assèchement /." Poitiers : I-Médias, 2008. http://08.edel.univ-poitiers.fr/theses/index.php?id=2490.
Lataoui, Zied. "Contribution à l'étude des transferts thermiques au sein des caloducs rainurés : identification de la position du front d'assèchement." Poitiers, 2008. http://theses.edel.univ-poitiers.fr/theses/2008/Lataoui-Zied/2008-Lataoui-Zied-These.pdf.
Heat pipes are thermally efficient devices used in many applications (electronics, telecommunication, aerospace,…) for heat management and regulation. In particular, heat pipes are considered as practical solutions for thermal distribution and heat dissipation problems in satellite panel surface. Heat pipe performance test is typically performed using some few wall temperature measurements. However, in such approach, the heat pipe operation phenomena cannot be conveniently investigated. For this aim, an axially grooved heat pipe is experimentally characterized using a test bench, to establish stationary wall temperature distributions for various operating conditions. The obtained temperature profiles show that the evaporator region includes the most important temperature gradients as a consequence to the input heat load increase. A sudden and significant temperature increase is therefore observed since the burnout limit is attained. In the evaporator section, an expected progression of the dry out can be then used to interpret experimental results. Nevertheless, ground test (1g) results cannot efficiently be discussed due to the existence of liquid puddle in the heat pipe bottom section. An inverse analysis is then proposed to localise dry out front positions in every axial groove of the evaporator region, using wall temperature measurements. The obtained results show that the dry out zone expands within the evaporator section as the heat load is increased. The significant temperature increase obtained in the evaporator wall can be therefore explained by the incapacity of the grooves to liquid feed the heated section (capillary limit). When an adverse tilt is introduced, the dry out is also involved in the adiabatic section. The important role of the capillary pumping capacity is also emphasized as a key parameter of the investigated heat pipe operation
Peuvrel, Christophe. "Etude des transferts thermiques lors de la circulation dans un échangeur d'un fluide frigoporteur à changement de phase solide-liquide." Pau, 2003. http://www.theses.fr/2003PAUU3018.
The use of an intermediate secondary refrigerant circuit in indirect cooling process can represent a solution to reduce natural refrigerant volumes and so to contribute to protect environment. In this context, a new generation of secondary fluid has been developed : a phase changing secondary refrigerant, named " Ice slurry ", which is represented by a pumpable mixture of a water solution and fine ice crystals. These thermal fluids offer attractive oportunities for thermal energy transportation and the heat transfer nhancement of heat exchangers notably thanks to latent heat of fusion. The heat transfer and friction characteristics of a 10% (wt/wt) ethanol/water ice slurry has been studied in different double pipe heat exchangers. Measurements were obtained for ice mass fractions ranging from 0% to 25% and velocities between 0,3 and 1,85 m. S-1. For some velocities, the results show that an increase in ice fractions causes a change in the slurry flow structure, influencing the evolution of the pressure drops and the heat transfer coefficients. In the last part of this work, we present an exergetic study of the two-phase mixture, which enables to determine a thermodynamic parameter to choose secondary refrigerant and the couple temperatureconcentration to use for a specific cooling process
Rios-Rojas, Carlos. "Etude des propriétés de transferts thermiques des coulis de glace stabilisée." Lyon, INSA, 2005. http://theses.insa-lyon.fr/publication/2005ISAL0021/these.pdf.
The purpose of this work is the experimental study of the heat transfer properties of a two-phase cooling fluid : stabilized ice-slurry. This ice-slurry is made of millimetric organic gel particles of 90 % porosity filled with water, in suspension in silicon oil. A specific installation was built up, essentially made of two identical smooth plate heat-exchangers ; one cooled by an alcohol flow, the other one heated with electric elements. This device allows to determine the steady-state local heat transfer coefficients during the freezing and the melting processes of the ice-slurry. These coefficients are derived from thermocouple temperature measurements : the temperature of the fluid and the temperature of each side of the heat-exchanger wall which are thus used as fluxmeters. The influence of the ice-slurry flow rate and of its particle concentration is also studied. A strong evolution of the local heat transfer coefficients is observed along one quarter of the heat-exchanger plate. During the melting process, with laminar flow conditions, the average heat transfer coefficient of the cooling fluid is 100 % greater with 20 % particle concentration than without particles. The increase of the heat transfer coefficient rises up to 200 % with 30 % particle concentration. During the melting process, with turbulent flow conditions, the increase of the heat transfer coefficient varies from 200 to 300 % depending on the particle concentration
Liu, Qiusheng. "Couplage entre forces interfaçiales dans un système multicouche de fluides immiscibles, avec ou sans effet des forces thermogravitionnelles." Aix-Marseille 2, 1994. http://www.theses.fr/1994AIX22065.
Belkadi, Abdelkrim. "Modélisation de la matière avec l'équation SAFT pour la prédiction des propriétés thermodynamiques des fluides complexes à travers simulis thermodynamics." Phd thesis, Toulouse, INPT, 2008. http://oatao.univ-toulouse.fr/7781/1/belkadi.pdf.
Houriez, Nicolas. "Etude du transport thremique dans des fluides complexes par calorimètrie photopyroélectrique." Littoral, 2008. http://www.theses.fr/2008DUNK0268.
In this work, a new methodology for the simultaneous determination of thermal parameters (thermal diffusivity, thermal effusivity, thermal conductivity and heat capacity) and pyroelectric coefficient of a pyroelectric material has been developed. This methodology is based on the study of pyroelectric signal generated by the pyroelectric sample when irradiated by a light source intensity modulated. Initially, a theoretical model was developed from the general theory of technique photopyroelectric corresponding to a configuration of the cell as simple as possible. A normalization procedure pyroelectric signal was proposed to eliminate experimental parameters whose value is difficult to estimate. Different procedures for determining the thermal parameters of pyroelectric sample have been proposed : they may be reduced from the development phase or the amplitude of the normalized frequancy modulation. For each of the proposed procedures, a detailed study has assessed the error in determining thermal parameters based on experimental parameters. For measurements based on temperature, two different procedures have been proposed : the first is based on the combination of phase and amplitude of the signal at a given frequency modulation, the latter uses the value of the normalized phase two different frequencies. In addition, it has been shown that the temperature dependence of pyroelectric coefficient could also be measured from the amplitude of the pyroelectric signal. Another application of the method is the measurement of thermal effusivity liquid when the pyroelectric material is well characterized, then playing the role of sensor. It is not necessary to know the thickness of liquid film in thermal contact with the pyroelectric material, which makes measuring simple and applicable to highly viscous fluids. Finally, the first measurements of thermal parameters performed on a ferroelectric liquid crystal were presented. The pyroelectric signal obtained as a funtion of frequency and temperature is similar to that obtained with a pyroelectric material “classic”. The method allows the characterization of ferroelectric liquid crytals also produced in film form. The results obtained for a single crystal, a ceramic, a polymer and a ferroelectric liquid crystal have shown that the method could be applied for the characterization of pyroelectric materials of any kind
Rahli, Ouamar. "Etude des milieux poreux constitués de fibres rigides : empilements, écoulements et transferts de chaleur." Aix-Marseille 1, 1997. http://www.theses.fr/1997AIX11064.
Guérin, Romuald. "Estimation des hétérogénéités de traitement lors de la cuisson de fluides alimentaires polyphasiques en cuves mécaniquement agitées." Nancy 1, 2003. http://www.theses.fr/2003NAN10166.
In this work, a system that allows obtaining dynamic images of temperature fields from a set of 19 electrical property measurements of the agitated fluid via a number of electrodes which are mounted non-intrusively on the vessel boundary has been developped. Using this system, it was shown the existence of thermal gradients within the vessel. In the same time, the developed tool permits to appreciate structural heterogeneity of texturing foods during cooking from a detection algorithm based on the log-likelihood ratio and applied on the first derivative of the delivered electrical signal. Experimental studies were performed with model fluids, simulating the behavior of real food fluids. That was necessary in order to be freed from the seasonal variations of real foods and to be able to discuss the physical phenomena observed during cooking of such fluids
Книги з теми "Fluides caloporteurs – Propriétés thermiques":
Applied Thermodynamics Of Fluids. Royal Society of Chemistry, 2010.
Shenoy, Aroon, Mikhail Sheremet, and Ioan Pop. Convective Flow and Heat Transfer in Wavy Surfaces: Viscous Fluids, Porous Media, and Nanofluids. Taylor & Francis Group, 2016.
Solana, J. R. Perturbation Theories for the Thermodynamic Properties of Fluids and Solids. Taylor & Francis Group, 2019.
Solana, J. R. Perturbation Theories for the Thermodynamic Properties of Fluids and Solids. Taylor & Francis Group, 2013.
Solana, J. R. Perturbation Theories for the Thermodynamic Properties of Fluids and Solids. Taylor & Francis Group, 2013.
Частини книг з теми "Fluides caloporteurs – Propriétés thermiques":
FLAMANT, Gilles. "Fluides caloporteurs pour centrales solaires." In Le solaire à concentration, 167–84. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9079.ch5.
DELAHAYE, Anthony, and Laurence FOURNAISON. "Utilisation des hydrates pour le stockage et la distribution du froid." In Stockage de la chaleur et du froid 1, 161–216. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9133.ch7.