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Study on formation of ice slurry by W/O emulsion (discussion for promoting propagation of supercooling dissolution due to AC voltage impression) in Revue internationale du froid, Vol.33, issue 8 (December 2010)
[article]
Titre : Study on formation of ice slurry by W/O emulsion (discussion for promoting propagation of supercooling dissolution due to AC voltage impression) Titre original : Etude sur la génération de coulis de glace à l’aide d’une émulsion eau-huile (discussion sur la proportion de la propagation de la dissolution surrefroidie sous l’effet d’une tension électrique alternative) Type de document : texte imprimé Année de publication : 2011 Article en page(s) : pp. 1598–1604 Langues : Anglais (eng) Français (fre) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Coulis de glace;Émulsion;Eau;Huile;Enquête;Procédé;Champ électrique;Courant alternati Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : 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 emulsion does not come in direct contact with the cooling wall. However, the start of propagation of supercooling dissolution barely occurs and the subsequent rate of propagation is much slower. In a previous study, it was clarified that DC voltage impression to the emulsion was effective in promoting the propagation of supercooling dissolution of the emulsion. In the present paper, the validity of applying an AC voltage to the emulsion in place of a DC voltage is discussed. Moreover, under a fixed composition ratio of water and oil in the emulsion, influences of varying the magnitudes of the applied AC voltage and frequency on the propagation process are clarified.
in Revue internationale du froid > Vol.33, issue 8 (December 2010) . - pp. 1598–1604[article] Study on formation of ice slurry by W/O emulsion (discussion for promoting propagation of supercooling dissolution due to AC voltage impression) = Etude sur la génération de coulis de glace à l’aide d’une émulsion eau-huile (discussion sur la proportion de la propagation de la dissolution surrefroidie sous l’effet d’une tension électrique alternative) [texte imprimé] . - 2011 . - pp. 1598–1604.
Langues : Anglais (eng) Français (fre)
in Revue internationale du froid > Vol.33, issue 8 (December 2010) . - pp. 1598–1604
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Coulis de glace;Émulsion;Eau;Huile;Enquête;Procédé;Champ électrique;Courant alternati Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : 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 emulsion does not come in direct contact with the cooling wall. However, the start of propagation of supercooling dissolution barely occurs and the subsequent rate of propagation is much slower. In a previous study, it was clarified that DC voltage impression to the emulsion was effective in promoting the propagation of supercooling dissolution of the emulsion. In the present paper, the validity of applying an AC voltage to the emulsion in place of a DC voltage is discussed. Moreover, under a fixed composition ratio of water and oil in the emulsion, influences of varying the magnitudes of the applied AC voltage and frequency on the propagation process are clarified. Study on leakage via the radial clearance in a novel synchronal rotary refrigeration compressors in Revue internationale du froid, Vol. 34, issue 1 (Jan 2011)
[article]
Titre : Study on leakage via the radial clearance in a novel synchronal rotary refrigeration compressors Titre original : Etude sur les fuites à travers l'espace mort dans un nouveau compresseur frigorifique rotatif synchrone Type de document : texte imprimé Année de publication : 2011 Article en page(s) : pp. 84-93 Langues : Anglais (eng) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : COMPRESSEUR ROTATIF SYSTEME FRIGORIFIQUE PISTON ROULANT MOTEUR A COMPRESSION Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur
in Revue internationale du froid > Vol. 34, issue 1 (Jan 2011) . - pp. 84-93[article] Study on leakage via the radial clearance in a novel synchronal rotary refrigeration compressors = Etude sur les fuites à travers l'espace mort dans un nouveau compresseur frigorifique rotatif synchrone [texte imprimé] . - 2011 . - pp. 84-93.
Langues : Anglais (eng)
in Revue internationale du froid > Vol. 34, issue 1 (Jan 2011) . - pp. 84-93
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : COMPRESSEUR ROTATIF SYSTEME FRIGORIFIQUE PISTON ROULANT MOTEUR A COMPRESSION Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur The freezing and supercooling of garlic (Allium sativum L.) in Revue internationale du froid, vol 32, Issue 2 (2009)
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Titre : The freezing and supercooling of garlic (Allium sativum L.) Titre original : Congélation et surfusion d'ail (Allium sativum L.) Type de document : texte imprimé Année de publication : 2011 Article en page(s) : pp. 53-260 Langues : Anglais (eng) Français (fre) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Expérimentation Congélation Surfusion entreposage frigorifique Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : This work shows that peeled garlic cloves demonstrate significant supercooling during freezing under standard conditions and can be stored at temperatures well below their freezing point (?2.7 °C) without freezing. The nucleation point or ‘metastable limit temperature’ (the point at which ice crystal nucleation is initiated) of peeled garlic cloves was found to be between ?7.7 and ?14.6 °C. Peeled garlic cloves were stored under static air conditions at temperatures between ?6 and ?9 °C for up to 69 h without freezing, and unpeeled whole garlic bulbs and cloves were stored for 1 week at ?6 °C without freezing.
in Revue internationale du froid > vol 32, Issue 2 (2009) . - pp. 53-260[article] The freezing and supercooling of garlic (Allium sativum L.) = Congélation et surfusion d'ail (Allium sativum L.) [texte imprimé] . - 2011 . - pp. 53-260.
Langues : Anglais (eng) Français (fre)
in Revue internationale du froid > vol 32, Issue 2 (2009) . - pp. 53-260
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Expérimentation Congélation Surfusion entreposage frigorifique Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : This work shows that peeled garlic cloves demonstrate significant supercooling during freezing under standard conditions and can be stored at temperatures well below their freezing point (?2.7 °C) without freezing. The nucleation point or ‘metastable limit temperature’ (the point at which ice crystal nucleation is initiated) of peeled garlic cloves was found to be between ?7.7 and ?14.6 °C. Peeled garlic cloves were stored under static air conditions at temperatures between ?6 and ?9 °C for up to 69 h without freezing, and unpeeled whole garlic bulbs and cloves were stored for 1 week at ?6 °C without freezing. The heat transfer performance of horizontal tube bundles in large falling film evaporators in Revue internationale du froid, Vol. 34, issue 1 (Jan 2011)
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Titre : The heat transfer performance of horizontal tube bundles in large falling film evaporators Titre original : Performance en termes de transfert de chaleur des faisceaux de tubes horizontaux dans les évaporateurs à film tombant de grandes dimensions Type de document : texte imprimé Année de publication : 2011 Article en page(s) : pp. 303-316 Langues : Anglais (eng) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : TRANSFERT THERMIQUE ETUDE EXPERIMENTALE EVAPORATEUR MODELISATION Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur
in Revue internationale du froid > Vol. 34, issue 1 (Jan 2011) . - pp. 303-316[article] The heat transfer performance of horizontal tube bundles in large falling film evaporators = Performance en termes de transfert de chaleur des faisceaux de tubes horizontaux dans les évaporateurs à film tombant de grandes dimensions [texte imprimé] . - 2011 . - pp. 303-316.
Langues : Anglais (eng)
in Revue internationale du froid > Vol. 34, issue 1 (Jan 2011) . - pp. 303-316
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : TRANSFERT THERMIQUE ETUDE EXPERIMENTALE EVAPORATEUR MODELISATION Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur The influence of the magnetic field on the performance of an active magnetic regenerator (AMR) in Revue internationale du froid, vol 34, issue 1 (janvier 2011)
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Titre : The influence of the magnetic field on the performance of an active magnetic regenerator (AMR) Titre original : Influence du champ magnétique actif sur la performance d'un régénérateur magnétique actif Type de document : texte imprimé Année de publication : 2012 Article en page(s) : pp. 192-203 Langues : Anglais (eng) Français (fre) Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Réfrigérateur magnétique; Champ magnétique; Simulation; Modélisation; Performance; Variation Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : The influence of the time variation of the magnetic field, termed the magnetic field profile, on the performance of a magnetocaloric refrigeration device using the active magnetic regeneration (AMR) cycle is studied for a number of process parameters for both a parallel plate and packed bed regenerator using a numerical model. The cooling curve of the AMR is shown to be almost linear far from the Curie temperature of the magnetocaloric material. It is shown that a magnetic field profile that is 10% of the cycle time out of sync with the flow profile leads to a drop in both the maximum temperature span and the maximum cooling capacity of 20–40% for both parallel plate and packed bed regenerators. The maximum cooling capacity is shown to depend very weakly on the ramp rate of the magnetic field. Reducing the temporal width of the high field portion of the magnetic field profile by 10% leads to a drop in maximum temperature span and maximum cooling capacity of 5–20%. An increase of the magnetic field from 1 T to 1.5 T increases the maximum cooling capacity by 30–50% but the maximum temperature span by only 20–30%. Finally, it was seen that the influence of changing the magnetic field was more or less the same for the different regenerator geometries and operating parameters studied here. This means that the design of the magnet can be done independently of the regenerator geometry.
in Revue internationale du froid > vol 34, issue 1 (janvier 2011) . - pp. 192-203[article] The influence of the magnetic field on the performance of an active magnetic regenerator (AMR) = Influence du champ magnétique actif sur la performance d'un régénérateur magnétique actif [texte imprimé] . - 2012 . - pp. 192-203.
Langues : Anglais (eng) Français (fre)
in Revue internationale du froid > vol 34, issue 1 (janvier 2011) . - pp. 192-203
Catégories : 621.5 : Technique pneumatique, du vide, des basses températures Mots-clés : Réfrigérateur magnétique; Champ magnétique; Simulation; Modélisation; Performance; Variation Index. décimale : 621.56 Technique des basses températures : réfrigération, pompe à chaleur Résumé : The influence of the time variation of the magnetic field, termed the magnetic field profile, on the performance of a magnetocaloric refrigeration device using the active magnetic regeneration (AMR) cycle is studied for a number of process parameters for both a parallel plate and packed bed regenerator using a numerical model. The cooling curve of the AMR is shown to be almost linear far from the Curie temperature of the magnetocaloric material. It is shown that a magnetic field profile that is 10% of the cycle time out of sync with the flow profile leads to a drop in both the maximum temperature span and the maximum cooling capacity of 20–40% for both parallel plate and packed bed regenerators. The maximum cooling capacity is shown to depend very weakly on the ramp rate of the magnetic field. Reducing the temporal width of the high field portion of the magnetic field profile by 10% leads to a drop in maximum temperature span and maximum cooling capacity of 5–20%. An increase of the magnetic field from 1 T to 1.5 T increases the maximum cooling capacity by 30–50% but the maximum temperature span by only 20–30%. Finally, it was seen that the influence of changing the magnetic field was more or less the same for the different regenerator geometries and operating parameters studied here. This means that the design of the magnet can be done independently of the regenerator geometry. The influence of the magnetic field on the performance of an active magnetic regenerattor (AMR) in Revue internationale du froid, Vol. 34, issue 1 (Jan 2011)
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PermalinkTheoretical and experimental analysis of a CO2 heat pump for domestic hot water in Revue internationale du froid, vol 34, issue 3 (mai 2011)
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PermalinkThermodynamic analysis and experimental investigation of a CO2 household heat pump dryer in Revue internationale du froid, Vol. 34, issue 4 (Juin 2011)
PermalinkThermodynamic analysis and optimization of a novel two-stage transcritical N2O cycle in Revue internationale du froid, Vol. 34, issue 4 (Juin 2011)
PermalinkThermodynamic performance assessment of a novel air cooling cycle : Maisotsenko cycle in Revue internationale du froid, Vol. 34, issue 4 (Juin 2011)
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