| Titre : | Experimental study of the effect of twisted-tape inserts on flow boiling heat transfer enhancement and pressure drop penalty (2013) |
| 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 |
| Auteurs : | Taye Stephen Mogaji, Auteur ; Fabio Toshio Kanizawa, Auteur ; Enio Pedone Bandarra Filho, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | International journal of refrigeration (Vol. 36 N° 2 (N° spécial), Mars 2013) |
| Article en page(s) : | pp. 504–515 |
| Note générale : | Refrigeration |
| Langues : | Anglais |
| Tags : | 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 |
