THERMAL SCIENCE

International Scientific Journal

THERMOHYDRAULIC PERFORMANCE COMPARISION OF COMPOUND INSERTS FOR A TURBULENT FLOW THROUGH A CIRCULAR TUBE

ABSTRACT
Heat transfer and pressure drop characteristics of three different passive inserts are experimentally investigated for individual and compound insertion. Insert cross-section is altered along the length of test section for compound insertion. Test runs were conducted in a concentric circular tube in tube heat exchanger in the Reynolds number range of 8000 to 32000 with water as a working fluid. Enhancements in Nusselt number and friction factors are reported to be in the range of 38-234% and 55-524%, respectively, over plain tube. The average performance ratios based on equal pumping power are also reported and found in the range of 0.63-1.53. Based on experimental results, optimum combination for compound insertion is proposed.
KEYWORDS
PAPER SUBMITTED: 2015-10-27
PAPER REVISED: 2015-12-26
PAPER ACCEPTED: 2016-04-09
PUBLISHED ONLINE: 2016-05-08
DOI REFERENCE: https://doi.org/10.2298/TSCI151027096K
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE 3, PAGES [1309 - 1319]
REFERENCES
  1. Kumar, A., Prasad, B., Investigation of Twisted Tape Inserted Solar Water Heaters-Heat Transfer, Friction Factor and Thermal Performance Results, Renewable Energy, 19 (2000), 3, pp. 379-398
  2. Chen, J., Muller, S., Duffy, G., G., Heat Transfer Enhancement in Dimpled Tubes, Applied Thermal Engineering, 21 (2001), 5, pp. 535-547
  3. Yilmaz, M., Comakli, O., Yapici, S., Sara, O., N., Heat Transfer and Friction Factor Characteristics in Decaying Swirl Flow Generated by Different Radial Guide Vane Swirl Generators, Energy Conservation and Management, 44 (2003), 2, pp. 283-300
  4. Paisarn, N., Effect of coil-wire insert on heat transfer enhancement and pressure drop of horizontal concentric tubes, International Communications in Heat and Mass Transfer, 33 (2006), pp. 753-763
  5. Naphon, P., Nuchjapo, M., Kurujareon, J., Tube Side Heat Transfer Coefficient and Friction Factor Characteristics of Horizontal Tubes with Helical Rib, Energy Conservation and Management, 47(2006), 18-19, pp. 3031-3044
  6. Li, X., Meng, J., Guo, Z., Turbulent flow and heat transfer in discrete double inclined ribs tube, International Journal of Heat and Mass Transfer, 52 (2009), pp. 962-970
  7. Seemawute, P., Eiamsa-ard, S., Thermohydraulics of turbulent through a round tube by a peripherally -cut twisted tape with an alternate axis, International Communications in Heat and Mass Transfer, 37(2010), pp. 652-659
  8. Eiamsa-ard, S., Wongcharee, K., Eiamsa-ard, P., Thianpong C., Heat Transfer Enhancement in a Tube Using Delta-Winglet Twisted Tape Inserts, Applied Thermal Engineering, 30 (2010), 4, pp. 310-318
  9. Eiamsa-ard, S., Seemawute, P., Wongcharee, K., Influences of peripherally-cut twisted tape insertion on heat transfer and thermal performance characteristics in laminar and turbulent tube flows, Experimental Thermal and Fluid Science, 34 (2010), pp. 711-719
  10. Kongkaitpaiboon, V., Nanan, K., Eiamsa-ard, S., Experimental Investigation of Heat Transfer and Turbulent Flow Friction in a Tube Fitted with Perforated Conical-Rings, International Communications in Heat and Mass Transfer, 37 (2010), 5, pp. 560-567
  11. Liu, S., Sakr, M., A Comprehensive Review on Passive Heat Transfer Enhancements in Pipe Exchangers, Renewable and Sustainable Energy Reviews, 19 (2013), pp. 64-81
  12. Promvonge, P., Eiamsa-ard, S., Heat Transfer Enhancement in a Tube with Combined Conical-Nozzle Inserts and Swirl Generator, Energy Conservation and Management, 47 (2006), 18-19, pp. 2867-2882
  13. Promvonge, P., Eiamsa-ard, S., Heat Transfer Behaviors in a Tube with Combined Conical-Ring and Twisted-Tape Insert, International Communications in Heat and Mass Transfer, 34 (2007), 7, pp. 849-859
  14. Promvonge, P., Thermal Augmentation in Circular Tube with Twisted Tape and Wire Coil Turbulators, Energy Conservation and Management, 49 (2008), 11, pp. 2949-2955
  15. Thianpong, C., Eiamasa-ard, P., Wongcharee, K., Eiamsa-ard, S., Compound Heat Transfer Enhancement of a Dimpled Tube with a Twisted Tape Swirl Generator, International Communications in Heat and Mass Transfer, 36 (2009), 7, pp. 698-704
  16. Promvonge, P.,Chompookham, T., Kwankaomeng, S., Thianpong, C., Enhanced Heat Transfer in a Triangular Ribbed Channel with Longitudinal Vortex Generators, Energy Conservation and Management, 51(2010), 6, pp. 1242-1249
  17. Saha, S. K., Thermohydraulics of Turbulent Flow through Rectangular and Square Ducts with Axial Corrugation Roughness and Twisted-Tapes with and without Oblique Teeth, Experimental Thermal and Fluid Science, 34 (2010), 6, pp. 744-752
  18. Garcia, A., Solano, J., Vicente, P., Viedma, A., The influence of artificial roughness shape on heat transfer enhancement: Corrugated tubes, dimpled tubes and wire coils, Applied Thermal Engineering, 35 (2012), pp. 196-201
  19. Incropera, F., Dewitt, P., Fundamentals of Heat and Mass Transfer, Wiley, India, 2010
  20. Deshmukh, P., Vedula, R., Heat transfer and pressure drop characteristics of turbulent flow through circular tube fitted with vortex generator inserts, International Journal of Heat and Mass Transfer, 79 (2014), pp. 551-560
  21. Guo, J., Yan, Y., Jiang, F., Fan A., Effects of upwind area of tube inserts on heat transfer and flow resistance characteristics of turbulent flow, Experimental Thermal and Fluid Science, 48 (2013), pp. 147- 155

© 2017 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence