Thermohydraulics of Turbulent Flow Through Heat Exchanger Tubes Fitted with Circular-rings and Twisted Tapes

Review of heat transfer enhancement methods: Focus on passive methods using swirl flow devices

“…The influences of circular-ring turbulators (CRT) and twisted tape (TT) swirl generators on the heat transfer enhancement, pressure drop and thermal performance factor characteristics in a round tube were reported by Eiamsa-ard et al [67] (Fig. 45).…”

Heat Transfer Enhancement Using Twisted Tape Insert: A Review

“…The thermal performance factor of T-WA with F-wing varies between 0.98 and 1.29; 0.93 and 1.22; and 0.88 and 1.16for e P = 0.75, 1.0 and 1.25, respectively. Smith Eiamsa-ard, VichanKongkaitpaiboon and KwanchaiNanan [9] carried out an experimental investigation to evaluate heat transfer enhancement using twisted tape fitted with circular ring. The circular-ring turbulators were individually employed and together with the twisted tape swirl generators in the heated section of the tube.…”

A study of heat transfer enhancement in a new solar air heater having circular type turbulators

“…13 heater on heat exchangers without solar radiation in earlier investigations [14][15][16]23]. In order to see the advantage of turbulators of SAHs having semi circular type's absorber plate, the present work was performed and compared with previous SAHs works as shown in Table 3.…”