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Portable forced-air tunnel evaluation for cooling products inside cold storage rooms / D. F. Barbin in International journal of refrigeration, Vol. 35 N° 1 (Janvier 2012) 

Public ISBD [article]  in International journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 202–208 Titre : Portable forced-air tunnel evaluation for cooling products inside cold storage rooms Titre original : Evaluation d'un tunnel de refroidissement et de congélation pour le refroidissement de produits à l'intérieur de chambres froides utilisées pour l'entreposage Type de document : texte imprimé Auteurs : D. F. Barbin, Auteur ; L.C. Neves Filho, Auteur ; V. Silveira Júnior, Auteur Année de publication : 2012 Article en page(s) : pp. 202–208 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Frozen  food  Air  distribution  Refrigeration  Freezing  Heat  transfer Résumé : Freezing process efficiency is affected by the required conditions to keep the air flow and temperature at the product surface. The objective of this work was to obtain results on comparative studies with air exhaustion and blowing using an experimental portable forced-air freezing tunnel. The device was designed to improve cooling rates inside storage room without the need for a cooling/freezing tunnel. A heterogeneity factor was proposed for air circulation evaluation and compared with convective heat transfer coefficient (hef) values. Lower modules of heterogeneity factor values represent smaller temperature differences among samples. Comparing two different air flow processes, heterogeneity factor values were similar for regions where the cooling air could flow without obstructions. However, larger differences were observed for regions with hampered air circulation. Results indicated that the air distribution, as well as the heat transfer, occurs more uniformly around the products in the exhausting process than in the blowing system. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002106 [article] Portable forced-air tunnel evaluation for cooling products inside cold storage rooms = Evaluation d'un tunnel de refroidissement et de congélation pour le refroidissement de produits à l'intérieur de chambres froides utilisées pour l'entreposage [texte imprimé] / D. F. Barbin, Auteur ; L.C. Neves Filho, Auteur ; V. Silveira Júnior, Auteur . - 2012 . - pp. 202–208. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 202–208 Mots-clés : Frozen  food  Air  distribution  Refrigeration  Freezing  Heat  transfer Résumé : Freezing process efficiency is affected by the required conditions to keep the air flow and temperature at the product surface. The objective of this work was to obtain results on comparative studies with air exhaustion and blowing using an experimental portable forced-air freezing tunnel. The device was designed to improve cooling rates inside storage room without the need for a cooling/freezing tunnel. A heterogeneity factor was proposed for air circulation evaluation and compared with convective heat transfer coefficient (hef) values. Lower modules of heterogeneity factor values represent smaller temperature differences among samples. Comparing two different air flow processes, heterogeneity factor values were similar for regions where the cooling air could flow without obstructions. However, larger differences were observed for regions with hampered air circulation. Results indicated that the air distribution, as well as the heat transfer, occurs more uniformly around the products in the exhausting process than in the blowing system. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002106