Validation of Heat Transfer between Theoretical and Experimental from the Internal Surface of Vertical Tubes with Internal Rings Heated by Electrical Heating Coils

Source:
By:Ramesh Chandra Nayak, Manmatha K. Roul, Ipsita jena, Ipsita Dash, Ashish Ku. Patra

DOI: https://doi.org/10.30564/ese.v1i1.1029

Abstract:

The comparison between experimental and theoretical heat transfer inside heated vertical channels that dissipate heat from the internal surface with and without internal rings  is studied. The experimental setup consists of a circular pipe which is heated electrically by providing constant heat flux on the wall. The theoretical and experimental analysis is conducted in several pipes of same diameter but different lengths. The length of the pipe varies from 450 mm to 850 mm. The length to diameter ratios are taken as L/D = 10, 12.22, 15.56, and 18.89. The value of imposed heat flux varies from 250 to 3340 W/m². The internal ring thickness varies from 4 mm to 8 mm. separation distance between the internal rings varies from 75mm to 300 mm. The theoretical results are compared with experimental data to ascertain numerical accuracy of the method. The effects of L/D ratio, thickness of internal rings and separation distance on the heat transfer performance are studied. The experimental result is compared with theoretical, theoretical results are found by using ANSYS. In this study theoretical result for wall temperature along the height of tube, fluid temperature at exit of tube are compared with experimental data.

References:

[1] Roul M.K. and Nayak R. C.. Experimental investigation of natural convection heat transfer through heated vertical tubes. International Journal of Engineering Research and Applications (IJERA), 2012, 2(6): 1088. [2] Huang G.J., Wong S.C. and Lin C.P.. Enhancement of natural convection heat transfer from horizontal rectangular fin arrays with perforations in fin base. International Journal of Thermal Sciences, 2014, 84: 164. [3] Zhang K., Yang M., Wang j. and Zhang Y.. Experimental study on natural convection in a cylindrical envelope with an internal concentric cylinder with slots. International Journal of Thermal Sciences, 2014, 76: 190. [4] Li B. and Byon C.. Investigation of natural convection heat transfer around a radial heat sink with a concentric ring. International Journal of Heat and Mass Transfer, 2015, 89: 159. [5] Jha B.K. and Ajibade A.O.. Effect of viscous dissipation on natural convection flow between vertical parallel plates with time-periodic boundary conditions. Commun Nonlinear Sci NumerSimulat, 2012, 17: 1576. [6] Nayak R.C., Roul M.K., and Sarangi S.K.. Experimental Investigation of Natural Convection Heat Transfer in Heated Vertical Tubes with discrete rings. Experimental Techniques, 2017, 41(6): 585. [7] Sahoo L.K, Roul M.K. Swain R.. Theoretical Analysis of Steady Laminar Natural Convection Heat Transfer from a Pin Finned Isothermal Vertical Plate. Heat Transfer-Asian Research, 2017, 46(7): 840–862. [8] Sahoo L.K, Roul M.K. Swain R.. Review on steady laminar natural convection heat transfer augmentation factor with square conductive pin fin arrays. Journal of Applied Mechanics and Technical Physics, Springer, 2017, 58(6): 1115–1122. [9] Roul, M.K., Dash, S.K.. Pressure Drop Caused by Two-phase Flow of Oil/Water Emulsions Through Sudden Expansions and Contractions: A Computational Approach. International Journal of Numerical Methods for Heat & Fluid Flow, 2009, 19(5): 665-688. [10] Tsuji T., Kajitani T., Nishino T.. Heat transfer enhancement in a turbulent natural convection boundary layer along a vertical flat plate. International Journal of Heat and Fluid Flow, 2007, 28: 1472. [11] Nayak R.C., Roul M.K., Sarangi S.K.. Experimental Investigation of Natural Convection Heat Transfer in Heated Vertical Tubes. International Journal of Applied Engineering Research. 2017, 12(10): 2538. [12] Bieliński H.K., Mikielewicz J.. Application of a two phase thermosyphon loop with minichannels and a minipump in computer cooling. Archives of thermodynamics, 2016, 37(1): 3–16. DOI:https://doi.org/10.1515/aoter-2016-0001 [13] Kosowska M.G., Agnieszka K.K., Luckos A., Wolski K., Musial T.. Oxy-combustion of biomass in a circulating fluidized bed. Archives of thermodynamics, 2016, 37(1): 17–30. DOI:https://doi.org/0.1515/aoter-2016-0002 [14] Porzuczek J.. On line diagnostics and self-tuning method for the fluidized bed temperature controller. Archives of thermodynamics, 2016, 37(1): 31–46. DOI:https://doi.org/10.1515/aoter-2016-0003 [15] Drapała M.H.,Bury T.. Utilization of the horizontal ground heat exchanger in the heating and cooling system of a residential building. Archives of thermodynamics, 2016, 37(1): 47–72. DOI:https://doi.org/10.1515/aoter-2016-0004 [16] Kotowicz J., Berdowska S.. The influence of selected parameters on the efficiency and economic charactersistics of the oxy-type coal unit with a membrane-cryogenic oxygen separator. Archives of thermodynamics, 2016, 37(1): 73–85. DOI:https://doi.org/10.1515/aoter-2016-0005 [17] Kotowicz J., Job M.. Thermodynamic analysis of the advanced zero emission power plan. Archives of thermodynamics, 2016, 37(1): 87–98. DOI:https://doi.org/10.1515/aoter-2016-0006 [18] Drapała M.H., Bury T., Widziewicz K.. Analysis of radiative heat transfer impact in cross-flow tube and fin heat exchangers. Archives of thermodynamics, 2016, 37(1): 99–112. DOI:https://doi.org/10.1515/aoter-2016-0007 [19] Drożyński Z. Steam condensation analysis in a power plant condense. Archives of thermodynamics, 2018, 39(4): 3–32 DOI:https://doi.org/10.1515/aoter-2018-0027 [20] Archana M., Gireesha B.J., Rashidi M.M., Prasanna kumara B.C., Gorla R.S.R., Bidirectionally stretched flow of Jeffrey liquid with nanoparticles, Rosseland radiation and variable thermal conductivity. Archives of thermodynamics , 2018, 39(4): 33–57 DOI:https://doi.org/10.1515/aoter-2018-0028