Heat transfer enhancement and pressure drop of the horizontal concentric tube with twisted wires brush inserts

Heat transfer performance evaluation for turbulent flow through a tube with twisted wire brush inserts

“…5(a), the friction factors obtained from the tube with twisted wire brush inserts were higher than those of the plain tube. This was because of the swirl flow, drag forces, and the turbulence augmentation produced by the twisted wire brush inserts [25].…”

“…Wazed et al [24] investigated the enhancement of heat transfer in turbulent flow through tube with perforated twisted tape inserts and found a significant enhancement of heat transfer at the cost of increased pumping power. Naphon and Suchana [25] experimentally studied the heat transfer enhancement and pressure drop of the horizontal concentric tube with twisted wire brush inserts, and showed that the twisted wire brush inserts have a large effect on the enhancement of heat transfer with the corresponding increase in pressure drop.…”

Effect of Twisted-Tape Turbulators and Nanofluid on Heat Transfer in a Double Pipe Heat Exchanger

“…Results of these studies proved that the inclusion of nanoparticles improves the thermal conductivity compared to the conventional fluid and increases heat transfer rate with the nanoparticle concentration. Naphon and Suchana [15] studied experimentally the effect of twisted wire brush inserts of water turbulent flow on the heat transfer enhancement in a horizontal concentric tube. It was observed that the heat transfer rate and the friction factor of the plain tube with 300-twisted-wire brush insert were higher than those of the plain tube with 200-and 100-twistedwire brush insert and subsequently higher than those of the plain tube without twisted wire brush insert.…”

Heat transfer performance for turbulent flow through a tube using double helical tape inserts

“…Sreenivasulu and Prasad [11] numerically studied the flow and heat transfer characteristics in an annulus wrapped with a helical wire for constant heat flux boundary condition. Naphon and Suchana [12] experimentally studied the heat transfer enhancement and pressure drop of the horizontal concentric tube with twisted wire brush inserts. Wongcharee and Eiamsa-ard [13] investigated the influences of twisted tapes with alternate-axes and triangular, rectangular and trapezoidal wings on heat transfer, fluid friction and thermal performance characteristics in a tube.…”