• Ashish S. Mantri
• M. A. Kadam
• D.G. Kumbhar

The paper focuses on CFD analysis and experimental investigation of heat transfer enhancement of circular receiver tube fitted with twisted tape inserts. Water is flowing through a circular receiver tube having inner diameter and length of 19 mm and 1000 mm respectively. The tapes are inserted in tube at three different twist ratio(y) of (2, 2.67 and 4) having 45mm, 60mm and 90mm pitch. CFD analysis is performed on plain tube by using standard k-€ and SST-k-ω model. SST-K-ω model was selected for further studies as it is more reliable model and provides more accurate prediction of flow separation. CFD results shows that 45mm pitch twisted tape gives better result as compared to 60mm & 90mm pitch twisted tapes. For further experimentation, 45mm pitch twisted tape is selected. The result obtained from plain twisted tapes are compared with plain tube within the Reynolds number range from 3193.38 to 15962.2. The experimental & CFD results reveals that heat transfer rate and friction factor in a circular tube fitted with twisted tape insert were significantly higher than the plain tube. Based on thermal performance factor, it was observed that 45 mm pitch twisted tape insert gives maximum Ƞth as compared with 60 mm and 90 mm pitch.

Heat transfer augmentation, Twisted tape insert, Twist ratio (y), Thermal performance factor (ɳth)

"Heat Transfer Enhancement of Receiver Tube Using Twisted Tape Inserts", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 6, page no.452-460, June-2018, Available :http://www.jetir.org/papers/JETIR1806665.pdf

"Heat Transfer Enhancement of Receiver Tube Using Twisted Tape Inserts", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 6, page no. pp452-460, June-2018, Available at : http://www.jetir.org/papers/JETIR1806665.pdf