Experimental study of the effect of twisted-tape inserts on flow boiling heat transfer enhancement and pressure drop penalty / Taye Stephen Mogaji in International journal of refrigeration, Vol. 36 N° 2 (N° spécial) (Mars 2013)  

Public ISBD [article]  inInternational journal of refrigeration > Vol. 36 N° 2 (N° spécial) (Mars 2013) . - pp. 504–515 Titre : Experimental study of the effect of twisted-tape inserts on flow boiling heat transfer enhancement and pressure drop penalty Titre original : Etude expérimentale sur l'effet des inserts en forme de rubans torsadés sur l'amélioration du transfert de chaleur lors de l'ébullition en écoulement et la diminution de la chute de pression Type de document : texte imprimé Auteurs : Taye Stephen Mogaji, Auteur ; Fabio Toshio Kanizawa, Auteur ; Enio Pedone Bandarra Filho, Auteur Année de publication : 2013 Article en page(s) : pp. 504–515 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Flow boiling  Twisted tape  Heat transfer enhancement  Pressure drop  Swirl flow Résumé : This study presents experimental results of heat transfer coefficient and pressure drop during two-phase flow of R134a in a horizontal tube containing twisted-tape inserts. The test section is a 2 m long copper tube of 15.9 mm inner diameter. The experiments were performed for tapes with twist ratios of 9 and 14 and a tube without insert. The mass velocity ranged from 75 to 200 kg m−2 s−1 and the vapor quality from 5 to 95%, for adiabatic condition and for constant heat flux of 10 kW m−2. Experimental pressure drop and heat transfer coefficient results are presented, and also an analysis of overall enhancement due to the inserts. The use of twisted-tape inserts is suitable if applied to the high vapor quality region of the evaporator and under high mass velocities. En ligne : http://www.sciencedirect.com/science/article/pii/S014070071200268X [article] Experimental study of the effect of twisted-tape inserts on flow boiling heat transfer enhancement and pressure drop penalty = Etude expérimentale sur l'effet des inserts en forme de rubans torsadés sur l'amélioration du transfert de chaleur lors de l'ébullition en écoulement et la diminution de la chute de pression [texte imprimé] / Taye Stephen Mogaji, Auteur ; Fabio Toshio Kanizawa, Auteur ; Enio Pedone Bandarra Filho, Auteur . - 2013 . - pp. 504–515. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 2 (N° spécial) (Mars 2013) . - pp. 504–515 Mots-clés : Flow boiling  Twisted tape  Heat transfer enhancement  Pressure drop  Swirl flow Résumé : This study presents experimental results of heat transfer coefficient and pressure drop during two-phase flow of R134a in a horizontal tube containing twisted-tape inserts. The test section is a 2 m long copper tube of 15.9 mm inner diameter. The experiments were performed for tapes with twist ratios of 9 and 14 and a tube without insert. The mass velocity ranged from 75 to 200 kg m−2 s−1 and the vapor quality from 5 to 95%, for adiabatic condition and for constant heat flux of 10 kW m−2. Experimental pressure drop and heat transfer coefficient results are presented, and also an analysis of overall enhancement due to the inserts. The use of twisted-tape inserts is suitable if applied to the high vapor quality region of the evaporator and under high mass velocities. En ligne : http://www.sciencedirect.com/science/article/pii/S014070071200268X

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