• M Sheik Mohamed
• J Habeeb Rahman
• Ayaz Ahmed

In the present work, the heat transfer and friction characteristics were experimentally investigated, employing twisted tape insert with holes inserted in a plain tube heat exchanger. The experiment was conducted by using water-based Al2O3 nanofluid at 0.3% volume concentration. The twisted tape insert with holes was inserted into the tube to generate the turbulent flow which helped to increase the heat transfer rate of the tube. The flow rate of the tube was in a range of Reynolds number between 800 to 2400. The physical properties of water-based Al2O3 nanofluid needed to calculate the pressure drop and convective heat transfer coefficient have been measured. In this experiment the pitch length 4cm and 6cm twisted tape insert with holes was used. In the experiment, the water-based Al2O3 nanofluids used as a working fluid and the readings are taken down with and without twisted tape insert with holes. The experimental data obtained were compared with those from plain tubes of published data. Experimental results confirmed that the use of twisted tape insert with holes leads to a higher heat transfer rate over the plain tube of water-based Al2O3 nanofluid.

Enhancement heat transfer, Nusselt number, Reynolds number, Water-based Al2O3 nanofluid, twisted tape insert with holes, Friction factor.

"EXPERIMENTAL STUDY ON HEAT TRANSFER ENHANCEMENT IN A PLAIN TUBE HEAT EXCHANGER FITTED WITH TWISTED TAPE INSERT WITH DIFFERENT TWIST RATIO BY USING WATER-BASED AL2O3 NANOFLUID", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.344-349, May-2019, Available :http://www.jetir.org/papers/JETIR1905W08.pdf

"EXPERIMENTAL STUDY ON HEAT TRANSFER ENHANCEMENT IN A PLAIN TUBE HEAT EXCHANGER FITTED WITH TWISTED TAPE INSERT WITH DIFFERENT TWIST RATIO BY USING WATER-BASED AL2O3 NANOFLUID", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp344-349, May-2019, Available at : http://www.jetir.org/papers/JETIR1905W08.pdf