Abstract
Natural convection heat transfer within concentric annular pipes has many engineering applications such as in heat exchangers, electronic devices, the nuclear energy sector, aerospace and pipeline systems. Therefore, this investigative research includes three parts, with the first containing numerical simulation to study the natural convection heat transfer in a concentric annular horizontal pipe for six different geometries (Circular, Square, Diamond, Triangular, Rectangular, and Elliptic) using pure water. The results showed that the heat transfer rate of concentric elliptic and circular pipes is nearly 40% and 37% respectively greater than that of the other geometries. Once the optimum geometry had been adopted, two types of nanofluids (Al2O3-H2O and H2O-SiO3) were examined to investigate whether nanofluid has positive effects compared to pure water. For the Al2O3-H2O nanofluid with 0.5% volume fraction, the heat transfer coefficient was found to increase by as much as 6% compared to pure water, with a low pressure drop. Finally, in order to find a novel multi-objective optimisation process, the effect of inclination angle (θ) and aspect ratio (AR) was also examined to find the optimum design for the concentric annular pipe for maximum heat transfer rate and minimum pressure through the annular gap. The multi-objective optimum design detected the scope of enhancement in heat transfer with acceptable pressure inside the annular gap at AR = 8 and θ = 90o. Therefore, some useful guidelines on the influence of both geometrical and working fluid parameters on concentric annular pipe design can be derived from this research.
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References
Fadhil AM, Khalil WH, Al-damook A (2019) The hydraulic-thermal performance of miniature compact heat sinks using SiO2-water nanofluids. Heat Transf Asian Res 48(7):3101–3114
Al-Damook A, Kapur N, Summers JL, Thompson HM (2016) Computational design and optimisation of pin fin heat sinks with rectangular perforations. Appl Therm Eng 105:691–703
Bezaatpour M, Hadi R (2020) Energetic and exergetic performance enhancement of heat exchangers via simultaneous use of nanofluid and magnetic swirling flow: a two-phase approach. Ther Sci Eng Prog 20:100706
Mahdi MS, Mahood HB, Hasan AF, Khadom AA, Campbell AN (2019) Numerical study on the effect of the location of the phase change material in a concentric double pipe latent heat thermal energy storage unit. Therm Sci Eng Prog 11:40–49
Abed N, Imran A, Andrea C, Hector I, Adel N (2020) Assessment and evaluation of the thermal performance of various working fluids in parabolic trough collectors of solar thermal power plants under non-uniform heat flux distribution conditions. Energies 13(15):3776
King CR (1931) Perkins’ hermetic tube boilers. The Engineer 152:405–406
Perkins, L. P., and W. E. Buck. “Improvements in Devices for the Diffusion or Transference of Heat.” UK Patent 22 (1892)
Faghri A (2014) Heat pipes: review, opportunities and challenges. Front Heat Pipes (FHP) 5(1):1–48
Faghri A, Thomas S (1989) Performance characteristics of a concentric annular heat pipe: Part I—Experimental prediction and analysis of the capillary limit, pp 844–850
Faghri A (1989) Performance characteristics of a concentric annular heat pipe: Part 2-Vapor flow analysis. J Heat Transf (Transactions of the ASME (American Society of Mechanical Engineers), Series C);(United States) 111(4):851–857
Mustaffar A, Phan AN, Reay D, Boodhoo K (2019) Concentric annular heat pipe characterisation analysis for a drying application. Appl Therm Eng 149:275–286
Abed WM, Shareef AJ, Najeeb AA (2010) Natural convection heat transfer in horizontal concentric annulus between outer cylinder and inner flat tube. Anbar J Eng Sci 3(2):31–45
Sakr RY, Berbish NS, Abd-Aziz AA, Hanafi AS (2008) Experimental and Numerical Investigation of Natural Convection Heat Transfer in Horizontal Elliptic Annuli. Int J Chem Reactor Eng 6(1):1–26
Xu X, Sun G, Yu Z, Hu Y, Fan L, Cen K (2009) Numerical investigation of laminar natural convective heat transfer from a horizontal triangular cylinder to its concentric cylindrical enclosure. Int J Heat Mass Transf 52(13–14):3176–3186
Yang, Xiufeng, and Song-Charng Kong. “Numerical study of natural convection states in a horizontal concentric cylindrical annulus using SPH method.” arXiv preprint arXiv:1712.05831 (2017)
Wang Y, Chen J, Zhang W (2019) Natural convection in a circular enclosure with an internal cylinder of regular polygon geometry. AIP Adv 9(6):065023
Bouras A, Djezzar M, Ghernoug C (2013) Numerical simulation of natural convection between two elliptical cylinders: influence of Rayleigh number and Prandtl number. Energy Procedia 36:788–797
Sheikholeslami M, Ellahi R, Hassan M, Soleimani S (2014) A study of natural convection heat transfer in a nanofluid filled enclosure with elliptic inner cylinder. Int J Numerical Methods Heat Fluid Flow, 24(8):1906–1927
Ravnik J, Škerget L (2015) A numerical study of nanofluid natural convection in a cubic enclosure with a circular and an ellipsoidal cylinder. Int J Heat Mass Transf 89:596–605
Zhang P, Zhang X, Deng J, Song L (2016) A numerical study of natural convection in an inclined square enclosure with an elliptic cylinder using variational multiscale element free Galerkin method. Int J Heat Mass Transf 99:721–737
Abed N, Imran A (2020) An extensive review of various technologies for enhancing the thermal and optical performances of parabolic trough collectors. Int J Energy Res 44(7):5117–5164
Al-damook A, Alfellag MA, Khalil WH (2020) Three-dimensional computational comparison of mini pinned heat sinks using different nanofluids: part one—the hydraulic-thermal characteristics. Heat Transf Asian Res 49(1):591–613
Abu-Nada E, Masoud Z, Hijazi A (2008) Natural convection heat transfer enhancement in horizontal concentric annuli using nanofluids. Int Commun Heat Mass Transf 35(5):657–665
Khanafer K, Vafai K, Lightstone M (2003) Buoyancy-driven heat transfer enhancement in a two-dimensional enclosure utilizing nanofluids. Int J Heat Mass Transf 46(19):3639–3653
Nnanna AGA, Fistrovich T, Malinski K, Choi SUS (2004) Thermal transport phenomena in buoyancy-driven nanofluids proceedings of IMECE04 2004 ASME International Mechanical Engineering Congress and Exposition November 13-20, 2004, Anaheim, California USA
Routhu M, Nnanna AGA (2006) Mathematical formulation of transport phenomena in buoyancy-driven nanofluids proceedings of IMECE2006 ASME International Mechanical Engineering Congress and Exposition November 5-10, 2006, Chicago, Illinois, USA
Putra N, Roetzel W, Das SK (2003) Natural convection of nano-fluids. Heat Mass Transf 39(8–9):775–784
Soleimani S, Sheikholeslami M, Ganji DD, Gorji-Bandpay M (2012) Natural convection heat transfer in a nanofluid filled semi-annulus enclosure. Int Commun Heat Mass Transf 39(4):565–574
Tayebi T, Chamkha AJ (2016) Free convection enhancement in an annulus between horizontal confocal elliptical cylinders using hybrid nanofluids. Numerical Heat Transf A Appl 70(10):1141–1156
Maiga SEB, Palm SJ, Nguyen CT, Roy G, Galanis N (2005) Heat transfer enhancement by using nanofluids in forced convection flows. Int J Heat Fluid Flow 26(4):530–546
Duangthongsuk W, Wongwises S (2009) Heat transfer enhancement and pressure drop characteristics of TiO2–water nanofluid in a double-tube counter flow heat exchanger. Int J Heat Mass Transf 52(7–8):2059–2067
Akbari OA, Toghraie D, Karimipour A, Safaei MR, Goodarzi M, Alipour H, Dahari M (2016) Investigation of rib's height effect on heat transfer and flow parameters of laminar water–Al2O3 nanofluid in a rib-microchannel. Appl Math Comput 290:135–153
Sekrani G, Poncet S (2016) Further investigation on laminar forced convection of nanofluid flows in a uniformly heated pipe using direct numerical simulations. Appl Sci 6(11):332
Hussain S, Aziz A, Aziz T, Khalique CM (2016) Slip flow and heat transfer of nanofluids over a porous plate embedded in a porous medium with temperature dependent viscosity and thermal conductivity. Appl Sci 6(12):376
Moradi H, Bazooyar B, Etemad SG, Moheb A (2015) Influence of the geometry of cylindrical enclosure on natural convection heat transfer of Newtonian nanofluids. Chem Eng Res Des 94:673–680
Vajjha RS, Das DK (2009) Experimental determination of thermal conductivity of three nanofluids and development of new correlations. Int J Heat Mass Transf 52(21–22):4675–4682
Kuehn TH, Goldstein RJ (1976) An experimental and theoretical study of natural convection in the annulus between horizontal concentric cylinders. J Fluid Mech 74(04):695–720
ANSYS Fluent V 14.5 User’s Guide, 2012
Kuehn TH, and Goldstein RJ (1978) "An experimental study of natural convection heat transfer in concentric and eccentric horizontal cylindrical annuli." ASME. J. Heat Transfer. November 1978; 100(4):635–640
Terekhov VI, Bogatko TV (2008) Effect of boundary layer thickness before the flow separation on aerodynamic characteristics and heat transfer behind an abrupt expansion in a round tube. Thermophys Aeromechanics 15(1):91–97
Narayanan A, Toropov VV, Wood AS, Campean IF (2007) Simultaneous model building and validation with uniform designs of experiments. Eng Optim 39(5):497–512
Khatir Z, Taherkhani AR, Paton J, Thompson H, Kapur N, Toropov V (2015) Energy thermal management in commercial bread-baking using a multi-objective optimisation framework. Appl Therm Eng 80:141–149
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Al-damook, A., Azzawi, I.D.J. Multi-objective numerical optimum design of natural convection in different configurations of concentric horizontal annular pipes using different nanofluids. Heat Mass Transfer 57, 1543–1557 (2021). https://doi.org/10.1007/s00231-021-03051-8
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DOI: https://doi.org/10.1007/s00231-021-03051-8