International journal of refrigeration, Vol. 33 N° 8. International journal of refrigeration - Décembre 2010
| Titre : | International journal of refrigeration, Vol. 33 N° 8. International journal of refrigeration - Décembre 2010 |
| Type de document : | Bulletin |
| Paru le : | 02/02/2011 |
Dépouillements
Article : texte imprimé
M. Kauffeld, Auteur ;
M.J. Wang, Auteur ;
V. Goldstein, Auteur
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The role of secondary refrigerants is expected to grow as the focus on the reduction of greenhouse gas emissions increases. The effectiveness of secondary refrigerants can be improved when phase changing media are introduced in place of single-p[...]
Article : texte imprimé
Indirect systems with aqueous solution have long been used to minimize the charge and leakage of (primary) refrigerants. In ice slurry applications such aqueous solutions are used below the freezing point, benefitting from the enthalpy change re[...]
Article : texte imprimé
Hiroyuki Kumano, Auteur ;
Tetsuo Hirata, Auteur ;
Michito Shirakawa, Auteur
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Flow characteristics of ice slurry were experimentally investigated using narrow tubes. Reynolds number, the diameter of the tubes and the ice packing factor (IPF) were varied as the experimental parameters. Theoretical analysis was carried out [...]
Article : texte imprimé
Ashley C.S. Monteiro, Auteur ;
Pradeep K. Bansal, Auteur
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This paper presents a review on the pressure drop in pipes for ice slurry flows. The variation of the pressure drop as a function of slurry velocity, pipe diameter as well as ice concentration in the slurry is discussed. The stratification obser[...]
Article : texte imprimé
Tatsunori Asaoka, Auteur ;
Hiroyuki Kumano, Auteur ;
Masashi Okada, Auteur
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The calculation method for the effective latent heat of fusion of ice in aqueous solution was proposed, in order to clarify the amount of heat generated by the melting of ice in ice slurry. In this study, the effect of the temperature of the aqu[...]
Article : texte imprimé
Hiroyuki Kumano, Auteur ;
Tetsuo Hirata, Auteur ;
Ryouta Shouji, Auteur
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Heat transfer characteristics of ice slurry were investigated experimentally. The Reynolds number, diameter of the tubes and ice packing factor (IPF) were varied as experimental parameters. For laminar flow, it was found that the ratio of the Nu[...]
Article : texte imprimé
T. Kousksou, Auteur ;
A. Arid, Auteur ;
J. Majid, Auteur
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The interaction between laminar Rayleigh–Benard convection and non-isothermal melting process is studied for the case of ice slurry kept in a rectangular cavity heated from the bottom. Clear visualization of the Rayleigh–Benard convective cells [...]
Article : texte imprimé
V. Chégnimonhan, Auteur ;
C. Josset, Auteur ;
H. Peerhossaini, Auteur
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Most crystallization models for ice slurries are based on the equilibrium thermodynamic approach, an assumption that is not made a priori here. We present results of simulations grounded on classical nucleation theory and crystal growth included[...]
Article : texte imprimé
T. Kousksou, Auteur ;
T. El Rhafiki, Auteur ;
K. El Omari, Auteur
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A model has been developed for the simulation of laminar hydrodynamic and heat transfer characteristics in a horizontal circular tube for a suspension flow with micro-size phase-change material (PCM) particles. The energy equation is formulated [...]
Article : texte imprimé
Li Huang, Auteur ;
Christian Doetsch, Auteur ;
Clemens Pollerberg, Auteur
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A paraffin phase change emulsion is a multifunctional fluid consisting of water as the continuous phase and a paraffin as the dispersed phase. It can store or transfer large amounts of thermal energy by using the latent heat capacity of the para[...]
Article : texte imprimé
Koji Matsumoto, Auteur ;
Hirofumi Yamauchi, Auteur ;
Yoshikazu Teraoka, Auteur
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This study is focused on a W/O (water-in-oil) emulsion with 60–80% water contents for formation of ice slurry in ice storage system. The emulsion is made of oil–water mixture with a little amino group modified silicone oil additive. Ice slurry c[...]
Article : texte imprimé
Koji Matsumoto, Auteur ;
Hirofumi Yamauchi, Auteur ;
Yoshikazu Teraoka, Auteur
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In an ice storage system, use of a water-in-oil (W/O) emulsion is an effective means of forming ice slurry. It is possible to form ice slurry by cooling the emulsion without the adhesion of ice to a cooling wall because water contained in the em[...]
Article : texte imprimé
E. Günther, Auteur ;
T. Schmid, Auteur ;
H. Mehling, Auteur
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When a liquid starts to solidify only when cooled well below its melting temperature, this is called subcooling. From nucleation theory, subcooling is expected to increase for small volumes due to statistics and seed isolation effects. PCM emuls[...]
Article : texte imprimé
P. Schalbart, Auteur ;
M. Kawaji, Auteur ;
K. Fumoto, Auteur
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Compared with conventional single-phase heat transfer fluids such as chilled water for air conditioning applications, the apparent specific heat of phase change emulsions in the phase change temperature range is greatly increased, thus offering [...]
Article : texte imprimé
Salem Jerbi, Auteur ;
Anthony Delahaye, Auteur ;
Laurence Fournaison, Auteur
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The objective of this work is to investigate CO2 hydrate formation and dissociation kinetics in the aim of designing a circulation loop with heat exchangers for secondary refrigeration applications. The formation of gas hydrates is a crystalliza[...]
Article : texte imprimé
Hiroshi Suzuki, Auteur ;
Shingo Tateishi, Auteur ;
Yoshiyuki Komoda, Auteur
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An experimental study on flow characteristics of trimethylolethane (TME) hydrate slurries treated with drag-reducing surfactants has been performed in order to investigate the effect of molar ratio of counter-ions to surfactants. As drag-reducin[...]
Article : texte imprimé
Anthony Delahaye, Auteur ;
Laurence Fournaison, Auteur ;
Guilpart, Jacques, Auteur
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The objective of the present work is to characterise, using an experimental microscopic observation device, the crystal size distribution (CSD) of ice and tetrahydrofuran (THF) hydrate slurries, which can be used as two-phase refrigerant fluids [...]
Article : texte imprimé
T. Kousksou, Auteur ;
P. Bruel, Auteur
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The objective of this work is to investigate numerically a storage system formed by a cylindrical tank which is randomly packed with spheres having uniform sizes and encapsulating paraffin as phase change material (PCM). The packed bed is tested[...]
Article : texte imprimé
Marino Grozdek, Auteur ;
Boris Halasz, Auteur ;
Tonko Ćurko, Auteur
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In order to verify the mathematical model of an ice bank system developed for the purpose of predicting the system performance, experimental measurements on the ice bank system were performed. Static, indirect, cool thermal storage system, with [...]
Article : texte imprimé
C. Muriset, Auteur ;
Peter W. Egolf, Auteur ;
D. Vuarnoz, Auteur
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A PCM dephaser and storage module based on a melting/freezing model was built and implemented into the Dymola-Modelica software. This software offers thermal libraries with standard components as tubes, pumps, heat exchangers, etc. Main simulati[...]
Article : texte imprimé
U. Stritih, Auteur ;
V. Butala, Auteur
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This article presents an experimental analysis of cooling buildings using night-time cold accumulation in a phase change material (PCM), otherwise known as the “free-cooling principle”. Studies of the ceiling and floor free-cooling principle, as[...]
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