International Scientific Journal

Thermal Science - Online First

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Heat transfer and friction factor characteristics of pipe-in-pipe heat exchanger fitted with varient plain tape insert

The heat exchanger is used to transfer heat between the fluids without mixing them for both cooling and heating processes. Normally the fluids are separated by a solid wall or tube that is made of different materials in order to avoid mixing. The performance of a heat exchanger is predicted on the basis of heat transfer rate. Many new techniques are being explored by industries to improve the heat transfer rate of heat exchangers. In this work, a double tube heat exchanger is used for studying the variation in heat exchange by inserting a flat tape with different geometries (PT, PT-SCA and PT-SCR). Experiments are carried out by varying pressure of hot water and the evaluation is done for different mass flow rates with inlet temperatures of hot and cold water at 53°C and 30°C respectively under counter-flow arrangements. The experimental results revealed that the plain tape inserts in counter-flow arrangements enhance heat transfer rate substantially thereby increasing the effectiveness of the system for a marginal increase in pressure drop.
PAPER REVISED: 2019-09-19
PAPER ACCEPTED: 2019-11-01
  1. Dittus F.W. et. al., Heat transfer in automobile radiators of turbular type, Publications in Engg. 2 (1930), pp. 443- 461.
  2. Hasim .,Compound heat transfer enhancement by a combination of helically ribbed tube with twisted tape inserts, J. Chem Engg. of Japan 36 (2003, 9, pp. 1116-1122.
  3. Naphon P., Heat transfer and pressure drop in the horizontal double pipes with and without, Int. Comm. in Heat and Mass Transfer 33 (2006), 2, pp. 166-175.
  4. Vivekanandan, M et. al, Pressure Vessel Design using PV-ELITE Software with Manual Calculations and Validation by FEM, Journal of Engineering Technology, 8 (2019),1, pp.425-433.
  5. Pradeep Mohan Kumar.K., et al., Computational Analysis and Optimization of Spiral Plate Heat Exchanger, J. of Applied Fluid Mechanics, Volume 11 (2018), Special Issue,, 121-128.
  6. Eiamsa-ard, S., "Compound heat transfer enhancement of a dimpled tube with a twisted tape swirl generator", Int. Comm. Heat Mass Transfer 36 (2009), pp.698-704.
  7. Eiamsa-ard, S et al., Heat transfer enhancement in a tube using delta-winglet twisted tape inserts, Applied Therm. Eng 30 (2010), pp. 310-318.
  8. Avudaiappan, T., et al., Potential Flow Simulation through Lagrangian Interpolation Meshless Method Coding, J. of Applied Fluid Mechanics, 11 (2018), Special Issue, pp. 129 - 134.
  9. Pethkool, S, et al., Turbulent heat transfer enhancement in a heat exchanger using helically corrugated tube", Int. Comm. Heat and Mass TransferVol. 38 (2011), 3, pp. 340- 347.
  10. Godwin Antony, A., et al., Experimental investigation of I.C Engine using various Diesel Blends, Asian Journal of Research in Social Sciences and Humanities 6 (2016), 12, 221-235.
  11. Sivaprakash, M,, Support vector machine for modelling and simulation of heat exchangers, Thermal Sciences An Int. J. (2020),
  12. Sathivel, P, et al, Mathematical model of fluid flow and heat exchanger, Thermal Sciences An Int. J. (2020) ,
  13. Sarmad A. Abdal Hussein, Experimental investigation of double pipe heat exchanger by using semi-circular disc baffles, Int. J. of Computer App. 115 (2015),4, pp. 13-17.
  14. Sathish, T,, Tlonn for the effective prediction of heat transfer rates in tube heat exchangers, Thermal Sciences An Int. J. (2020),
  15. Kanade Rahul, H,, Heat transfer enhancement in a double pipe heat exchanger using CFD, Int. Research J. of Engg. and Tech. 02 (2015),09, pp. 419-430.
  16. K. Simhadri, Comparison of the overall heat transfer coefficient value of double pipe heat exchanger without and with various twisted inserts of different twist ratios, IOSR- J. of Mech. and Civil Engg. 12 (2015), 2, pp. 115-124.
  17. Qasim S. Mahdi, Enhancement of heat transfer in shell and tube heat exchanger with tabulator and nanofluid, Int. J. Mech. Engg. and Tech. 7 (2016), 3, pp.125-138.
  18. Kaushalendra Kr Singh., Study of Heat Transfer and Flow Friction in a Concentric Double Pipe Heat Exchanger Fitted with Twisted Tape Elements, J of Material Sci. and Mech. Engg. 3 (2016), 3, pp.158-162.
  19. Elumagandla Suredar., Design and Fabrication of Concentric Tube Heat Exchanger, Int. J. of Latest Trend in Engg and Tech. 7 (2016), 3, pp. 82-91.