Experimental Heat Transfer Analysis of Helical Coiled Tubes on the Basis of Variation in Curvature Ratio and Geometry

Document Type : Full Lenght Research Article

Authors

1 Department of Mechanical Engineering, Mandsaur University, Rewas Dewda Road, SH - 31, Mandsaur, Madhya Pradesh, 458001, India

2 Department of Mechanical Engineering, Dr. Vithalrao Vikhe Patil College of Engineering, Vadgaon Gupta, Ahmednaghar, Maharashtra, 414111, India

Abstract

The influence of curvature ratio (CR) within helical tubes on secondary flows and subsequent enhancement of heat transfer is well-established. Furthermore, the interaction between the shell fluid and the helical tube is recognized as pivotal in this regard. In this paper, the impact of varying CR and coil geometry on the performance of heat exchangers (HEs) through experimental heat transfer analysis conducted on five distinct coils viz., straight helical
(ϴ= 90°), conical (ϴ= 70°,50°,30°), and spiral (ϴ= 0°) configurations have been studied. Moreover, correlations for modified effectiveness are proposed for all HEs. The Reynolds number range chosen for the analysis spans from 3700 to 20000, encompassing laminar and turbulent flow regimes of the coil hot water. The optimal HE is identified based on thermal and hydrodynamic parameters, including hot water temperature difference, effectiveness, modified effectiveness, rate of heat transfer, pressure drops of the coil, shell fluids, and pumping power. Observations reveal that helical cone coil heat exchangers (HCCHEs) demonstrate superior thermal and hydrodynamic characteristics when the fluid flow aligns with increasing CR. Notably, for both laminar and turbulent flows, the highest hot water temperature difference, effectiveness, and rate of heat transfer are observed for ϴ= 30° HCCHE, while the lowest values are attributed to ϴ= 90° HE. Tube side Nusselt numbers, pressure drops, and friction factors show agreement with the predictions of researchers. The analysis reveals that the coil fluid pressure drop is maximal for ϴ =0° HE, whereas the maximum shell fluid pressure drop is encountered for ϴ =90° HE. Furthermore, the highest pumping power per unit heat transfer area for coil and shell fluids are noted for ϴ= 0° HE and ϴ= 90°HE, respectively, while ϴ= 30° HCCHE exhibits comparable performance to the remaining HEs within the specified parameter range, establishing its optimality.

Keywords

Main Subjects

References

Kakaç, S., Shah, R.K. and Aung, W., 1987. Handbook of single-phase convective heat transfer.
[2]   Prabhanjan, D.G., Raghavan, G.S.V. and Rennie, T.J., 2002. Comparison of heat transfer rates between a straight tube heat exchanger and a helically coiled heat exchanger. International communications in heat and mass transfer, 29(2), pp.185-191. doi: 10.1016/S0735-1933(02)00309-3
[3]   Naphon, P. and Suwagrai, J., 2007. Effect of curvature ratios on the heat transfer and flow developments in the horizontal spirally coiled tubes. International Journal of Heat and Mass Transfer, 50(3-4), pp.444-451. doi: 10.1016/j.ijheatmasstransfer.2006.08.002
[4]   Naphon, P., 2007. Thermal performance and pressure drop of the helical-coil heat exchangers with and without helically crimped fins. International Communications in Heat and Mass Transfer, 34(3), pp.321-330. doi: 10.1016/j.icheatmasstransfer.2006.11.009
[5]   Ali, M.E., 1994. Experimental investigation of natural convection from vertical helical coiled tubes. International journal of heat and mass transfer, 37(4), pp.665-671. doi: 10.1016/0017-9310(94)90138-4
[6]   Ghorbani, N., Taherian, H., Gorji, M. and Mirgolbabaei, H., 2010. An experimental study of thermal performance of shell-and-coil heat exchangers. International Communications in Heat and Mass Transfer, 37(7), pp.775-781. doi: 10.1016/j.icheatmasstransfer.2010.02.001
[7]   Ghorbani, N., Taherian, H., Gorji, M. and Mirgolbabaei, H., 2010. Experimental study of mixed convection   heat transfer in vertical helically coiled tube heat exchangers. Experimental Thermal and Fluid Science, 34(7), pp.900-905. doi: 10.1016/j.expthermflusci.2010.02.004
[8]   Shokouhmand, H., Salimpour, M.R. and Akhavan-Behabadi, M.A., 2008. Experimental investigation of shell and coiled tube heat exchangers using Wilson plots. International communications in heat and mass transfer, 35(1), pp.84-92. doi: 10.1016/j.icheatmasstransfer.2007.06.001
[9]   Jayakumar, J.S., Mahajani, S.M., Mandal, J.C., Vijayan, P.K. and Bhoi, R., 2008. Experimental and CFD estimation of heat transfer in helically coiled heat exchangers. Chemical engineering research and design, 86(3), pp.221-232. doi: 10.1016/j.cherd.2007.10.021
[10] Salimpour, M.R., 2008. Heat transfer characteristics of a temperature-dependent-property fluid in shell and coiled tube heat exchangers. International Communications in Heat and Mass Transfer, 35(9), pp.1190-1195. doi: 10.1016/j.icheatmasstransfer.2008.07.002
[11] Kharat, R., Bhardwaj, N. and Jha, R.S., 2009. Development of heat transfer coefficient correlation for concentric helical coil heat exchanger. International Journal of Thermal Sciences, 48(12), pp.2300-2308. doi: 10.1016/j.ijthermalsci.2009.04.008
[12] Moawed, M., 2011. Experimental study of forced convection from helical coiled tubes with different parameters. Energy conversion and Management, 52(2), pp.1150-1156. doi: 10.1016/j.enconman.2010.09.009
[13] Ke, Y., Pei-Qi, G., Yan-Cai, S. and Hai-Tao, M., 2011. Numerical simulation on heat transfer characteristic of conical spiral tube bundle. Applied Thermal Engineering, 31(2-3), pp.284-292. doi: 10.1016/j.applthermaleng.2010.09.008
[14] Elazm, A.M., Ragheb, A.M., Elsafty, A.F. and Teamah, M.A., 2011. Experimental and numerical comparison between the performance of helical cone coils and ordinary helical coils used as dehumidifier for humidification dehumidification in desalination units. International Journal of Applied Engineering Research, 2(1), p.104.
[15] Flórez-Orrego, D., Arias, W., López, D. and Velásquez, H., 2012, June. Experimental and CFD study of a single phase cone-shaped helical coiled heat exchanger: an empirical correlation. In Proceedings of the 25th international conference on efficiency, cost, optimization, simulation and environmental impact of energy systems (pp. 375-394).
[16] Kalpakli Vester, A., Örlü, R. and Alfredsson, P.H., 2016. Turbulent flows in curved pipes: Recent advances in experiments and simulations. Applied Mechanics Reviews, 68(5), p.050802. doi: 10.1115/1.4034135
[17] Jamshidi, N. and Mosaffa, A., 2018. Investigating the effects of geometric parameters on finned conical helical geothermal heat exchanger and its energy extraction capability. Geothermics, 76, pp.177-189. doi: 10.1016/j.geothermics.2018.07.007
[18] Daghigh, R. and Zandi, P., 2018. Experimental analysis of heat transfer in spiral coils using nanofluids and coil geometry change in a solar system. Applied Thermal Engineering, 145, pp.295-304. doi: 10.1016/j.applthermaleng.2018.09.053.
[19] Palanisamy, K. and Kumar, P.M., 2019. Experimental investigation on convective heat transfer and pressure drop of cone helically coiled tube heat exchanger using carbon nanotubes/water nanofluids. Heliyon, 5(5). doi: 10.1016/j.heliyon.2019.e01705.
[20] Heyhat, M.M., Jafarzad, A., Changizi, P., Asgari, H. and Valizade, M., 2020. Experimental research on the performance of nanofluid flow through conically coiled tubes. Powder technology, 370, pp.268-277. doi: 10.1016/j.powtec.2020.05.058.
[21] Ali, M., Rad, M.M., Nuhait, A., Almuzaiqer, R., Alimoradi, A. and Tlili, I., 2020. New equations for Nusselt number and friction factor of the annulus side of the conically coiled tubes in tube heat exchangers. Applied Thermal Engineering, 164, p.114545. doi: 10.1016/j.applthermaleng. 2019.114545.
[22] Sheeba, A., Akhil, R. and Prakash, M.J., 2020. Heat transfer and flow characteristics of a conical coil heat exchanger. International Journal of Refrigeration, 110, pp.268-276. doi: 10.1016/j.ijrefrig.2019.10.006.
[23] Al-Salem, K., Hosseini, E., Nohesara, A., Mehri, M., Ali, M., Almuzaiqer, R., Alimoradi, A. and Tlili, I., 2019. Suggestion of new correlations for the exergy efficiency and coefficient of exergy performance of annulus section of conically coiled tube-in-tube heat exchangers. Chemical Engineering Research and Design, 152, pp.309-319. doi: 10.1016/j.cherd.2019.10.002.
[24] Maghrabie, H.M., Attalla, M. and Mohsen, A.A., 2021. Performance of a shell and helically coiled tube heat exchanger with variable inclination angle: experimental study and sensitivity analysis. International Journal of Thermal Sciences, 164, p.106869. doi: 10.1016/j.ijthermalsci.2021.106869
[25] Chokphoemphun, S., Eiamsa-ard, S., Promvonge, P., Thongdaeng, S. and Hongkong, S., 2021. Heat transfer of a coil-tube heat exchanger in the freeboard zone of a rice husk fluidized-bed combustor. International Communications in Heat and Mass Transfer, 127, p.105462. doi: 10.1016/j.icheatmasstransfer.2021.105462
[26] Hassaan, A.M. and Mostafa, H.M., 2021. Experimental study for convection heat transfer from helical coils with the same outer surface area and different coil geometry. Journal of Thermal Science and Engineering Applications, 13(5), p.051012. doi: 10.1115/1.4049870
[27] Hassaan, A.M., 2022. An Experimental Investigation for the Use of Multi-Wall Carbon Nanotubes Based on Water Nanofluid in a Plate Heat Exchanger. Heat Transfer Research, 53(16). doi: 10.1615/HeatTransRes.2022042147
[28] Hassaan, A.M., 2023. Experimental investigation of the performance of the plate heat exchanger using (Multi-Walled Carbon Nanotubes–Al2O3/water) hybrid nanofluid. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 237(4), pp.1310-1318. doi: 10.1177/09544089221113977
[29] Sharma, S., Sah, A., Subramaniam, C. and Saha, S.K., 2021. Performance enhancement of tapered helical coil receiver using novel nanostructured carbon florets coating. Applied Thermal Engineering, 194, p.117065. doi: 10.1016/j.applthermaleng.2021.117065
[30] Hassaan, A.M., 2022. An investigation for the performance of the using of nanofluids in shell and tube heat exchanger. International Journal of Thermal Sciences, 177, p.107569. doi: 10.1016/j.ijthermalsci.2022.107569
[31] Hassaan, A.M., 2022. Evaluation for the performance of heat transfer process in a double pipe heat exchanger using nanofluids. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, 236(5), pp.2139-2146. doi: 10.1177/09544089221086825
[32] Hassaan, A.M., 2023. Comparing the performance of using nanofluids in two different types of heat exchangers with the same heat transfer area. Heat Transfer Research, 54(18). doi: 10.1615/HeatTransRes.2023045768
[33] Omri, M., Aich, W., Rmili, H. and Kolsi, L., 2022. Experimental Analysis of the Thermal Performance Enhancement of a Vertical Helical Coil Heat Exchanger Using Copper Oxide-Graphene (80-20%) Hybrid Nanofluid. Applied Sciences, 12(22), p.11614. doi: 10.3390/app122211614.
[34] Alklaibi, A.M., Mouli, K.V.C. and Sundar, L.S., 2023. Experimental investigation of heat transfer and effectiveness of employing water and ethylene glycol mixture based Fe3O4 nanofluid in a shell and helical coil heat exchanger. Thermal Science and Engineering Progress, 40, p.101739. doi: org/10.1016/j.tsep.2023.101739
[35] Abdullah, M.S. and Hussein, A.M., 2023. Thermal Performance of a Helical Coil Heat Exchanger Utilizing Nanofluids: A Review. Journal of Heat and Mass Transfer Research, 10, pp.121-134. doi: 10.22075/jhmtr.2023.30124.1428
[36] Kline, S.J., 1963. Describing uncertainties in single-sample experiments. Mech. Eng., 75, pp.3-8.
[37] VDI Society for Porous Engineering and Chemical, 2010. VDI heat atlas. Verlag Berlin Heidelberg: Springer. doi: 10.1007/978-3-540-77877-6_36
[38] Purandare, P.S., Lele, M.M. and Gupta, R.K., 2015. Investigation on thermal analysis of conical coil heat exchanger. International Journal of Heat and Mass Transfer, 90, pp.1188-1196. doi: 10.1016/j.ijheatmasstransfer.2015.07.044
[39] Kakaç, S., Liu, H. and Pramuanjaroenkij, A., 2002. Heat exchangers: selection, rating, and thermal design. CRC press.
[40] Sigalotti, L.D.G., Alvarado-Rodríguez, C.E. and Rendón, O., 2023. Fluid Flow in Helically Coiled Pipes. Fluids, 8(12), p.308. doi: 10.3390/fluids8120308
[41] Mori, Y. and Nakayama, W., 1967. Study of forced convective heat transfer in curved pipes (2nd report, turbulent region). International journal of heat and mass transfer, 10(1), pp.37-59. doi: 10.1016/0017-9310(67)90182-2
[42] Sobota, T., 2011. Experimental prediction of heat transfer correlations in heat exchangers. Developments in Heat  Transfer, pp.294-308. doi: 10.5772/20362
[43] Smith, E.M., 2005. Advances in thermal design of heat exchangers. Wiley. doi: 10.1002/0470017090
[44] Sun, S., Liu, J., Sang, R. and Zhao, K., 2022. Experimental study of flow friction behavior in coiled tubing. Energy Reports, 8, pp.187-196. doi: 10.1016/j.egyr.2022.10.291

Files

History

  • Receive Date: 28 October 2023
  • Revise Date: 24 March 2024
  • Accept Date: 31 March 2024

Share

How to cite

Statistics