Experimental Study of Heat Transfer Augmentation Characteristics of a Tube Affected by Geometric Parameters of Coiled Spring Inserts

Document Type : Full Length Research Article

Authors

Department of Mechanical Engineering, M.V.P.S’s K.B.T. College of Engineering, Nashik, 422013, Maharashtra, India

Abstract

In the present study, the heat transfer and flow friction characteristics of a circular tube with coiled spring inserts are experimentally reported for a fully developed turbulent flow regime. Experimental investigations were performed in a circular concentric tube in a tube heat exchanger in the Reynolds number (Re) range of 8000–32,000 with water as a working fluid. The average Nusselt number ratio (Nua/Nup) and average friction factor ratio (fa/fp) with and without inserts are reported to be in the range of 1.79–2.79 and 2.44–4.17, respectively, for the tested six geometries of the inserts. The Nusselt number ratio (Nua/Nuc) based on equal pumping power criteria is also reported and found to be in the range of 0.94–1.24. The effects of varying pitch to length of insert ratio (p/l) and diameter of insert to the inner diameter of tube ratio (dc/Di) on heat transfer and pressure drop are reported, and empirical correlation is given for Nusselt number in terms of Reynolds number (Re), pitch to length of insert ratio (p/l), insert diameter to inner diameter of tube ratio (dc/Di), and Prandtl number (Pr).

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References

[1]   Liu, S., & Sakr, M., 2013. A comprehensive review on passive heat transfer enhancements in pipe exchangers. Renewable and sustainable energy reviews, 19, pp. 64-81.
[2]   Eiamsa-Ard, S., Thianpong, C., Eiamsa-Ard, P. and Promvonge, P., 2010. Thermal characteristics in a heat exchanger tube fitted with dual twisted tape elements in tandem. International Communications in Heat and Mass Transfer, 37(1), pp. 39-46.
[3]   Singh, S. K., & Sarkar, J., 2020. Improving hydrothermal performance of hybrid nanofluid in double tube heat exchanger using tapered wire coil turbulator. Advanced Powder Technology, 31(5), pp. 2092-2100.
[4]   Singh, S. K., & Sarkar, J., 2021. Thermohydraulic behavior of concentric tube heat exchanger inserted with conical wire coil using mono/hybrid nanofluids. International Communications in Heat and Mass Transfer, 122, p. 105134.
[5]   Keklikcioglu, O., & Ozceyhan, V., 2022. Heat transfer augmentation in a tube with conical wire coils using a mixture of ethylene glycol/water as a fluid. International Journal of Thermal Sciences, 171, p. 107204.
[6]   García, A., Herrero-Martin, R., Pérez-García, J., & Solano, J. P., 2023. Validation of a new methodological approach for the selection of wire-coil inserts in thermal equipment. Applied Thermal Engineering, 218, p. 119273.
[7]   Nakhchi, M. E., Esfahani, J. A., & Kim, K. C., 2020. Numerical study of turbulent flow inside heat exchangers using perforated louvered strip inserts. International Journal of Heat and Mass Transfer, 148, p. 119143.
[8]   Bahiraei, M., Gharagozloo, K., & Moayedi, H. 2020. Experimental study on effect of employing twisted conical strip inserts on thermohydraulic performance considering geometrical parameters. International Journal of Thermal Sciences, 149, p. 106178.
[9]   Subirana, A.M., Solano, J.P., Herrero-Martín, R., García, A. and Pérez-García, J., 2023. Mixed convection phenomena in tubes with wire coil inserts. Thermal Science and Engineering Progress, 42, p. 101839.
[10] Sarviya, R. M., & Fuskele, V., 2018. Heat transfer and pressure drop in a circular tube fitted with twisted tape insert having continuous cut edges. Journal of Energy Storage, 19, pp. 10-14.
[11] Kapse, A. A., Shewale, V.C., Mogal, S. P., and Kakade, A B., 2023. A comprehensive review on passive heat transfer enhancements in pipe exchangers. JP journal of heat and mass transfer, 35, pp. 153-185.
[12] Yang, C. S., Jeng, D. Z., Yang, Y. J., Chen, H. R., & Gau, C., 2011. Experimental study of pre-swirl flow effect on the heat transfer process in the entry region of a convergent pipe. Experimental Thermal and Fluid Science, 35(1), pp. 73-81.
[13] Promvonge, P., 2008. Thermal augmentation in circular tube with twisted tape and wire coil turbulators. Energy Conversion and Management, 49(11), pp. 2949-2955.
[14] Singh, S. K., & Sarkar, J., 2021. Hydrothermal performance comparison of modified twisted tapes and wire coils in tubular heat exchanger using hybrid nanofluid. International Journal of Thermal Sciences, 166, p. 106990.
[15] Kapse, A. A., Dongarwar P. R., and Gawande, R. R., 2017. Thermo hydraulic Performance Comparison of Compound Inserts. Thermal Science, 21, pp. 1309-1319
[16] Kapse, A. A., Dongarwar, P. R., & Gawande, R. R., 2017. Experimental investigation of turbulent heat transfer performance in internal flow using a star shape cross sectioned twisted rod inserts. Heat and Mass Transfer, 53, pp. 253-264.
[17] Guo, J., Yan, Y., Liu, W., Jiang, F., & Fan, A. 2013. Effects of upwind area of tube inserts on heat transfer and flow resistance characteristics of turbulent flow. Experimental thermal and fluid science, 48, pp. 147-155.
[18] Eiamsa-ard, S., Pethkool, S., Thianpong, C., & Promvonge, P. 2008. Turbulent flow heat transfer and pressure loss in a double pipe heat exchanger with louvered strip inserts. International Communications in Heat and Mass Transfer, 35(2), pp. 120-129.
[19] Incropera, F.P., and DeWitt, D.P., 2010. Fundamentals of Heat and Mass Transfer, Wiley.
[20] Bergles, A.E., Blumenkrantz, A.R., and Taborek, J., 1974. Performance evaluation criteria for enhanced heat transfer surfaces. In International Heat Transfer Conference 5 (IHTC-5), Tokyo, Japan, pp. 239-243. DOI: 10.1615/IHTC5.2130.
[21] Deshmukh, P. W., & Vedula, R. P., 2014. Heat transfer and friction factor characteristics of turbulent flow through a circular tube fitted with vortex generator inserts. International Journal of Heat and Mass Transfer, 79, pp. 551-560.

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History

  • Receive Date: 05 March 2023
  • Revise Date: 31 January 2024
  • Accept Date: 02 February 2024

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