Abstract
In this work, heat transfer in channels containing inserts of different shapes was investigated using computational fluid dynamics (CFD) modeling techniques taking a gaslight water heater as an example. Three types of devices inserted in the water heater tube (flow swirlers) were investigated: star-shaped, coiled wire, and classic ones in the form of twisted tapes. In the present study, the RNG k-ɛ turbulence model is used to model the turbulent flow regime. This numerical simulation has been performed over a Reynolds number range of 5800–18500. In the studied range of Reynolds number the maximum thermal performance factor was obtained by the starry inserts with A star/A inlet = 0.50. The results have exposed that also the use of all tube inserts leads to a considerable increase in heat transfer and pressure drop over the smooth tube. In addition, the results revealed that both heat transfer rate and friction factor in the tube equipped with starry insert were significantly higher than those in the tube fitted with the coiled wire inserts and classic twisted tape.
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P. Parthasarathy, P. Talukdar, and V. R. Kishore, “Enhancement of heat transfer with porous/solid insert for laminar flow of a participating gas in a 3-D square duct,” Numerical Heat Transfer; Part A: Applications 56(9), 764–784 (2009).
S. Kiwan and M. S. Alzahrany, “Effect of using porous inserts on natural convection heat transfer between two concentric vertical cylinders,” Numerical Heat Transfer; Part A: Applications 53(8), 870–889 (2008).
N. Yucel and R. T. Guven, “Forced-convection cooling enhancement of heated elements in a parallel-plate channels using porous inserts,” Numerical Heat Transfer; Part A: Applications 51(3), 293 312 (2007).
X. Tong, J. A. Khan, and M. R. Amin, “Enhancement of heat transfer by inserting a metal matrix into a phase change material,” Numerical Heat Transfer; Part A: Applications 30(2), 125–141 (1996).
R. Sethumadhavan and M. R. Rao, “Turbulent flow heat transfer and fluid friction in helical wire coil inserted tubes,” Int. J. Heat Mass Transfer 26(12), 1833–1845 (1983).
K. Yakut and B. Sahin, “The effects of vortex characteristics on performance of coiled wire turbulators used for heat transfer augmentation,” Appl. Therm. Eng. 24(16), 2427–2438 (2004).
G. C. Kidd, Jr., “Heat transfer and pressure drop for nitrogen flowing in tube containing twisted-tapes,” AIChE J. 15(2), 581–585 (1969).
O. H. Klepper, “Heat transfer performance of short twisted-tapes,” AIChE J. 35, 1–24 (1972).
M. S. Lokanath, “Performance evaluation of full length and half length twisted-tape inserts on laminar flow heat transfer in tubes,” in Proceedings of the 14th National Heat and Mass Transfer Conference and Third ISHMT—ASME Joint Heat and Mass Transfer Conference, IIT Kanpur, India, 1997, pp. 319–324.
A. Dewan, P. Mahanta, K. Sumithra Raju, and P. Suresh Kumar, “Review of passive heat transfer augmentation techniques,” J. Power Energy 218, 509–525 (2004).
S. Eiamsa-ard, C. Thianpong, and P. Promvonge, “Experimental investigation of heat transfer and flow friction in a circular tube fitted with regularly spaced twisted tape elements,” Int. Commun. Heat Mass Transfer 33, 1225–1233 (2006).
S. Jaisankar, T. K. Radhakrishnan, and K. N. Sheeba, “Experimental studies on heat transfer and friction factor characteristics of thermosyphon solar water heater system fitted with spacer at the trailing edge of twisted tapes,” Appl. Therm. Eng. 29(5–6), 1224–1231 (2009).
S. W. Chang, Y. J. Jan, and J. S. Liou, “Turbulent heat transfer and pressure drop in tube fitted with serrated twisted-tape,” Int. J. Therm. Sci. 46(5), 506–518 (2007).
S. W. Chang, T. L. Yang, and J. S. Liou, “Heat transfer and pressure drop in tube with broken twisted-tape insert,” Exp. Therm. Fluid Sci. 32(2), 489–501 (2007).
M. Rahimi, S. R. Shabanian, and A. A. Alsairafi, “Experimental and CFD studies on heat transfer and friction factor characteristics of a tube equipped with modified twisted tape inserts,” Chem. Eng. Process. 48, 762–770 (2009).
S. Al-Fahed, L. M. Chamra, and W. Chakroun, “Pressure drop and heat transfer comparison for both microfin tube and twisted-tape inserts in laminar flow,” Exp. Therm. Fluid Sci. 18, 323–333 (1998).
V. Zimparov, “Enhancement of heat transfer by a combination of a single-start spirally corrugated tubes with a twisted-tape,” Exp. Therm. Fluid Sci. 25, 535–546 (2002).
P. Bharadwaj, A. D. Khondge, and A. W. Date, “Heat transfer and pressure drop in a spirally grooved tube with twisted tape insert,” Int. J. Heat Mass Transfer 52(8), 1938–1944 (2009).
P. Sivashanmugam, P. K. Nagarajan, and S. Suresh, “Experimental studies on heat transfer and friction factor characteristics of turbulent flow through a circular tube fitted with right and left helical screw-tape inserts,” Chem. Eng. Commun. 195(8), 977–987 (2008).
R. X. Cai and C. H. Gou, “Discussion on the convective heat transfer and field synergy principle,” Int. J. Heat Mass Transfer 50, 5168–5176 (2007).
J. F. Guo, M. T. Xu, and L. Cheng, “The application of field synergy number in shellandtube heat exchanger optimization design,” Appl. Energy 86(10), 2079–2087 (2009).
Q. Chen, J. X. Ren, and J. A. Meng, “Field synergy equation for turbulent heat transfer and its application,” Int. J. Heat Mass Transfer 50, 5334–5339 (2007).
E. Z. Ibrahim, “Augmentation of laminar flow and heat transfer in flat tubes by means of helical screw-tape inserts,” Energy Conversion and Management 52, 250–257 (2011).
T. S. Wang and Y. S. Chen, “Unified Navier-Stokes flow field and performance analysis of liquid rocket engines,” AIAA Journal 9(5), 678–685 (1993).
V. Gnielinski, “New equations for heat and mass transfer in turbulent pipe flow and channel flow,” International Chemical Engineering 16, 359–368 (1976).
F. W. Dittus and L. M. K. Boelter, Calif. University of California Publications on Engineering (Berkley, 1930).
L. F. Moody, “Friction factors for pipe flow,” Trans. ASME 66, 671–684 (1944).
B. S. Petukhov, “Heat transfer in turbulent pipe flow with variable physical properties,” in Advances in Heat Transfer, Ed. by J. P. Harnett (Academic Press, New York, 1970), vol. 6.
S. Eiamsa-ard, P. Seemawute, and Kh. Wongcharee, “Influences of peripherally-cut twisted tape insert on heat transfer and thermal performance characteristics in laminar and turbulent tube flows,” Experimental Thermal and Fluid Science 34, 711–719 (2010).
H. Usui, K. Sano, K. Iwashhita, and A. Isozaki, “Enhancement of heat transfer by a combination of internally grooved tube and twisted tape,” Int. Chem. Eng. 26(1), 97–104 (1986).
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Goodarzi, K., Goudarzi, S.Y. & Zendehbudi, G. Investigation of the effect of using tube inserts for the intensification of heat transfer. Therm. Eng. 62, 68–75 (2015). https://doi.org/10.1134/S004060151501005X
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DOI: https://doi.org/10.1134/S004060151501005X