International journal of refrigeration, Vol. 33 N° 4. International journal of refrigeration - Juin 2010
| Titre : | International journal of refrigeration, Vol. 33 N° 4. International journal of refrigeration - Juin 2010 |
| Type de document : | Bulletin |
| Paru le : | 16/06/2010 |
Dépouillements
Article : texte imprimé
Chaobin Dang, Auteur ;
Nobori Haraguchi, Auteur ;
Eiji Hihara, Auteur
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This study investigated the flow boiling heat transfer of carbon dioxide inside a small-sized microfin tube (mean inner diameter: 2.0 mm; helix angle: 6.3°) at a saturation temperature of 15 °C, and heat and mass flux ranges of 4.5–18 kW m−2 and[...]
Article : texte imprimé
Joaquim Rigola, Auteur ;
Nicolás Ablanque, Auteur ;
Carlos D. Pérez-Segarra, Auteur
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The present paper is a numerical and experimental comparative study of the whole vapour compression refrigerating cycle in general, and reciprocating compressors in particular, with the aim of showing the possibilities that CO2 offers for commer[...]
Article : texte imprimé
A. Subiantoro, Auteur ;
K.T. Ooi, Auteur
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In this paper, four possible design variants of the Revolving Vane expander have been examined in relation to their application when using CO2 as the working fluid in a refrigeration cycle. The detailed examination of the design components and i[...]
Article : texte imprimé
Xiao Feng Niu, Auteur ;
Kai Du, Auteur ;
Fu Xiao, Auteur
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Experiments of ammonia–water falling film absorption were performed in magnetic fields of different intensities and different directions as well as under varied operating conditions. Experimental results showed that the outlet concentration of a[...]
Article : texte imprimé
Francisco Táboas, Auteur ;
Manel Vallès, Auteur ;
Bourouis, Mahmoud, Auteur
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The objective of this work is to contribute to the development of plate heat exchangers as desorbers for ammonia/water absorption refrigeration machines driven by waste heat or solar energy. In this study, saturated flow boiling heat transfer an[...]
Article : texte imprimé
Experimental study on adsorption kinetics of activated carbon/R134a and activated carbon/R507A pairs
Khairul Habib, Auteur ;
Bidyut B. Saha, Auteur ;
Kazi A. Rahman, Auteur
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The objective of this article is to evaluate adsorption kinetics of R134a and R507A on pitch based activated carbon experimentally by a constant volume variable pressure method at different adsorption temperatures ranging from 20 to 60 °C. These[...]
Article : texte imprimé
Hasan Demir, Auteur ;
Moghtada Mobedi, Auteur ;
Semra Ülkü, Auteur
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The effects of metal piece additives on effective thermal conductivity and diffusivity of an unconsolidated adsorbent bed in which adsorbent is silica gel were investigated. The metal piece additives were copper, brass, aluminum and stainless st[...]
Article : texte imprimé
Marie-Eve Duprez, Auteur ;
Eric Dumont, Auteur ;
Marc Frère, Auteur
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This paper presents an improvement of the scroll compressors model previously published by Duprez et al. (2007). This improved model allows the calculation of refrigerant mass flow rate, power consumption and heat flow rate that would be release[...]
Article : texte imprimé
Ling-Xiao Zhao, Auteur ;
Liang-Liang Shao, Auteur ;
Chun-Lu Zhang, Auteur
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This paper presents steady-state hybrid modeling and analysis of water chillers with economized screw compressors using intermediate gas injection. The hybrid chiller model consists of the polynomial neural network compressor model and other com[...]
Article : texte imprimé
Ming Xia, Auteur ;
Xiaoping Chen, Auteur
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This paper analyzes resonant frequency of the moving magnet linear compressor of Stirling cryocooler. The CFD (Computational Fluid Dynamics) and FEM (Finite Element Method) are used for the analysis of resonant frequency with FLUENT 6.2 and ANSY[...]
Article : texte imprimé
D. Vuarnoz, Auteur ;
A. Kitanovski, Auteur ;
C. Gonin, Auteur
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In a rotary magnetic refrigerator a porous ring is turning in and out of a magnetic field region. The adiabatic demagnetization of the magnetocaloric material produces the “cold energy”. This is described by a discontinuous temperature decrease,[...]
Article : texte imprimé
K.K. Nielsen, Auteur ;
C. R. H. Bahl, Auteur ;
A. Smith, Auteur
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A two-dimensional numerical heat transfer model is used to investigate an active magnetic regenerator (AMR) based on parallel plates of magnetocaloric material. A large range of parameter variations are performed to study the optimal AMR. The pa[...]
Article : texte imprimé
José Roberto Simões-Moreira, Auteur
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A Thermodynamic air-standard cycle was envisaged for Ranque–Hilsh (R–H) or Vortex Tubes to provide relevant Thermodynamic analysis and tools for setting operating limits according to the conservation laws of mass and energy, as well as the const[...]
Article : texte imprimé
Rahim Shamsoddini, Auteur ;
Alireza Hossein Nezhad, Auteur
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In this paper, the effects of the nozzles number on the flow and power of cooling of a vortex tube are studied, using a three-dimensional numerical fluid dynamic model. Vortex tube has interesting functions and several industrial applications, a[...]
Article : texte imprimé
T. Dutta, Auteur ;
K.P. Sinhamahapatra, Auteur ;
S. S. Bandyopdhyay, Auteur
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An axisymmetric computational fluid dynamics (CFD) model is used to compare the influence of different Reynolds Averaged Navier–Stokes (RANS) based turbulence models in predicting the temperature separation in a Ranque–Hilsch vortex tube. The st[...]
Article : texte imprimé
Néstor Fonseca Diaz, Auteur ;
Jean Lebrun, Auteur ;
Philippe André, Auteur
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This article presents the results of an experimental study performed to develop a computational model of cooling ceiling systems. The model considers the cooling ceiling as a fin. Only the dry regime is considered. From ceiling and room dimensio[...]
Article : texte imprimé
Fabrizio Ascione, Auteur ;
Francesco Minichiello, Auteur
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For the conservation of cultural heritage, museums need appropriate HVAC systems. Besides the time stability of the microclimatic parameters in the exhibition rooms, a high spatial uniformity is necessary and, thus, an optimal performance of the[...]
Article : texte imprimé
O. Abdelaziz, Auteur ;
R. Radermacher, Auteur
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Small dimensions found in modern and novel heat exchanger (HX) designs encounter very challenging manufacturing issues. With current manufacturing techniques HXs in small dimensions will exhibit large tolerances relative to design variables. Hen[...]
Article : texte imprimé
J. Alberto Dopazo, Auteur ;
José Fernández-Seara, Auteur ;
Francisco J. Uhía, Auteur
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A detailed transient simulation model has been developed to predict and evaluate the performance of the hot-gas defrost process of an air-coil evaporator. In the model, the defrost process is subdivided into six stages: preheating, tube frost me[...]
Article : texte imprimé
M.K. Mittal, Auteur ;
Ravi Kumar, Auteur ;
Akhilesh Gupta, Auteur
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This paper presents an experimental investigation of coiling effect on the flow of R-407C in an adiabatic helical capillary tube. It has been observed that the coiling of capillary tube significantly influences the mass flow rate of R-407C throu[...]
Article : texte imprimé
Jaehyeok Heo, Auteur ;
Min Woo Jeong, Auteur ;
Yongchan Kim, Auteur
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A heat pump has received much attention as substitute for the conventional boiler or heating coil because of its high efficiency. For the wide application of the heat pump, the most important design factor is the performance degradation upon its[...]
Article : texte imprimé
Clito Afonso, Auteur ;
Manuel Castro, Auteur
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One component of the heat exchange rate in domestic refrigerators/freezers and of the other all types of refrigeration stores is the air infiltration due to the air exchange rate between inside and outside of the store trough the magnetic seals [...]
Article : texte imprimé
The computation of the partial and total volume of pressure vessels with various type of head profiles requires detailed knowledge of the head profile geometry. Depending on the type of head profile the derivation of the equations can become ver[...]
Article : texte imprimé
Grażyna Jaworska, Auteur ;
Emilia Bernaś, Auteur
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The aim of the present work was to determine changes in the texture of Boletus edulis resulting from blanching or soaking and blanching, freezing and twelve months' frozen storage. The texture was examined using instrumental as well as sensory p[...]
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