Experimental and CFD studies on heat transfer and friction factor characteristics of a tube equipped with modified twisted tape inserts

Experimental Investigation on Heat Transfer and Friction Factor Characteristics of a Water and Ethylene Glycol Mixture Flow of Internally Grooved Tubes

“…On the experimental part, higher Nusselt number and thermal -hydraulic performance are obtained for the square grooved tube with the other ones in the studied range of Reynolds number from 4900 to 13300. The increase of Nusselt number and Reynolds number indicates that the heat transfer rate also increases [1,2,6,7].The heat transfer co-efficient is also increases due to the mixing of ethylene glycol to the water and the mixture is passes through the grooved tubes. The study is carried out in different grooved tubes for a flow of water and ethylene glycol mixture; maximum heat transfer enhancement is obtained up to 36% for circular grooved tube, 55% for square grooved tube and 10 % trapezoidal grooved tube in comparison with smooth tube [6].…”

“…The increase of Nusselt number and Reynolds number indicates that the heat transfer rate also increases [1,2,6,7].The heat transfer co-efficient is also increases due to the mixing of ethylene glycol to the water and the mixture is passes through the grooved tubes. The study is carried out in different grooved tubes for a flow of water and ethylene glycol mixture; maximum heat transfer enhancement is obtained up to 36% for circular grooved tube, 55% for square grooved tube and 10 % trapezoidal grooved tube in comparison with smooth tube [6]. Since, water and ethylene glycol mixture has a good potential to be used for heat exchangers with a different proportions of water and ethylene glycol and different geometries of tube [1,2,6].…”

“…The study is carried out in different grooved tubes for a flow of water and ethylene glycol mixture; maximum heat transfer enhancement is obtained up to 36% for circular grooved tube, 55% for square grooved tube and 10 % trapezoidal grooved tube in comparison with smooth tube [6]. Since, water and ethylene glycol mixture has a good potential to be used for heat exchangers with a different proportions of water and ethylene glycol and different geometries of tube [1,2,6]. …”

“…Vincente et al [5], carried out an experimental investigation on heat transfer and frictional characteristics of spirally corrugated tubes in turbulent flow at different Prandtl numbers. Masoud Rahima et al [6], an experimental and CFD studies on heat transfer and friction factor characteristics of tube equipped with modified twisted tape inserts. Kadir bilen et al [7], carried out an experimental investigation on heat transfer and friction factor characteristics with internally grooved tubes.…”

Review on Recent Progresses in Heat Transfer Enhancement Through the Use of Passive Vortex Generators and Its Applications in Solar Parabolic Trough Systems

“…al. [42] and concluded that most of the heat transfer enhancement took place because of the higher amount of turbulence generated in fluid close to the tube walls.…”