Main Article Content
An experimental investigation was carried for measure tube-side heat transfer coefficient, friction factor, heat transfer enhancement efficiency of water for flow in an exceedingly circular tube fitted with rectangular-cut twisted tape insert. A copper tube of twenty six millimeter internal diameter and thirty millimeter outer diameter and 900 millimeter check length was used. A stainless-steel rectangular-cut twisted tape insert of five.25 twist magnitude relation was inserted into the sleek tube. The rectangular cut had eight millimeter depth and fourteen millimeter dimension. A regular heat flux condition was created by wrapping Nichrome wire round the check section and fiber glass the wire. Outer surface temperatures of the tube were measured at five totally different points of the check section by T-type thermocouples. 6 thermometers were used for measure the majority temperatures. At the outlet section the measuring system was placed in an exceedingly combination box. The painter numbers were varied within the vary 10000-19000 with heat flux variation fourteen to twenty two kW/m2 for swish tube, and twenty three to forty kW/m2 for tube with insert. Nusselt numbers obtained from swish tube were compared with Gnielinski correlation and errors were found to be within the vary of -6% to -25% with r.m.s. price of two hundredth. At comparable painter variety, Nusselt numbers in tube with rectangular-cut twisted tape insert were increased by a nonanofluid of 0.3 to 2.9 times at the value of increase of friction factors by 1.4 to 1.8 times compare thereto of swish tube. Heat transfer improvement efficiencies were found to be within the range of 1.9 to 2.3 and magnified with the rise of painter variety.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.