Inscrição na biblioteca: Guest
Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa
Heat Transfer Research
Fator do impacto: 0.404 FI de cinco anos: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimir: 1064-2285
ISSN On-line: 2162-6561

Volume 50, 2019 Volume 49, 2018 Volume 48, 2017 Volume 47, 2016 Volume 46, 2015 Volume 45, 2014 Volume 44, 2013 Volume 43, 2012 Volume 42, 2011 Volume 41, 2010 Volume 40, 2009 Volume 39, 2008 Volume 38, 2007 Volume 37, 2006 Volume 36, 2005 Volume 35, 2004 Volume 34, 2003 Volume 33, 2002 Volume 32, 2001 Volume 31, 2000 Volume 30, 1999 Volume 29, 1998 Volume 28, 1997

Heat Transfer Research

DOI: 10.1615/HeatTransRes.2018026953
pages 773-797


Dogan Erdemir
Erciyes University, Faculty of Engineering, Department of Mechanical Engineering Melikgazi, 38039, Kayseri, Turkey


This study deals with determination of the effect of the ratio of tank diameter D to tank length L on the thermal performance of horizontal mantled hot water tanks. The D/L ratio has a great impact on the thermal performance of hot water tanks because the storage volume and heat transfer surface area of a tank change with the D/L ratio. In this study, the effect of different D/L ratios on thermal performance for a horizontal mantled hot water tank was investigated numerically by considering a constant storage volume and heat transfer surface area separately. The D/L was taken equal to 0.35, 0.50, and 0.65. The FLUENT 17.1 code was used in numerical analyses. The numerical model was validated by experimental data. The results were evaluated in terms of energy and exergy efficiencies. The results showed that a shorter tank length caused higher inlet water jet effects. So, lower D/L ratios yield higher thermal performance for a horizontal mantled hot water tank. The highest exergy efficiencies were seen at D/L = 0.35 for a constant heat transfer surface area and a constant storage volume. Mantle flow and main flow rates had no significant effects on energy and exergy efficiencies. However, they significantly changed the stored water temperature. An increasing mantle inlet temperature decreased the exergy efficiency, an increasing main inlet temperature increased the exergy efficiency. However, since the main objective of a hot water tank is to supply high temperature hot water, the mantle inlet temperature should be higher. Energy efficiency was nearly 98% and almost same for all cases. Exergy efficiency changed from 10% to 60% among different cases.


  1. Alizadeh, S., An Experimental and Numerical Study of Thermal Stratifi cation in a Horizontal Cylindrical Solar Storage Tank, Solar Energy, vol. 66, no. 6, pp.409–421, 1999.

  2. Atmane, M.A., Chan, V.S.S., and Murray D.B., Natural Convection around a Horizontal Heated Cylinder: The Effects of Vertical Confi nement, Int. J. Heat Mass Transf., vol. 46, no. 19, pp. 3661–3672, 2003.

  3. Carrillo, A. and Cejudo, L.J.M.,, TRNSYS Model of a Thermosiphon Solar Domestic Water Heater with a Horizontal Store and Mantle Heat Exchanger, Solar Energy, vol. 72, no. 2, pp. 89–98, 2002.

  4. Castell, A., Medrano, M., Sole, C., and Cabeza, L.F., Dimensionless Numbers Used to Characterize Stratifi cation in Water Tanks for Discharging at Low Flow Rates, Renew. Energy, vol. 35, no. 10, pp. 2192–2199, 2010.

  5. Dincer, I and Rosen, M.A., Exergy, Amsterdam: Elsevier, pp. 127–162, 2007.

  6. Dincer, I and Rosen, M.A., Thermal Energy Storage System and Applications, West Sussex: John Wiley and Sons, 2011.

  7. Dincer, I. and Dost, S., A Perspective on Thermal Energy Storage Systems for Solar Energy Applications, Int. J. Energy Res., vol. 20, no. 6, pp. 547–557, 1996.

  8. Dincer, I., Evaluation and Selection of Energy Storage Systems for Solar Thermal Applications, Int. J. Energy Res., vol. 23, no. 12, pp. 1017–1028, 1999.

  9. Erdemir, D. and Altuntop, N., Experimental Investigation on the Effect of Placing Obstacle on Flow Direction on Thermal Performance in Horizontal Mantled Hot Water Tanks, Proc. of 4th Anatolian Energy Symp., Edirne, Turkey, pp. 1993–2002, 2018.

  10. Fertahi, S., Bouhal, T., Kousksou, T., Jamil, A., and Benbassou, A., Experimental Study and CFD Thermal Assessment of Horizontal Hot Water Storage Tank Integrating Evacuated Tube Collectors with Heat Pipes, Solar Energy, vol. 170, pp. 234–251, 2018.

  11. Haller, M.Y., Cruickshank, C.A., Streicher, W., Harrison, S.J., Andersen, E., and Furbo, S., Methods to Determine Stratifi cation Effi ciency of Thermal Energy Storage Processes—Review and Theoretical Comparison, Solar Energy, vol. 83, no. 10, pp. 1847–18.

  12. Helwa, N.H., Mobarak, A.M., El-Sallak, M.S., and El-Ghetany, H.H., Effect of Hot-Water Consumption on Temperature Distribution in a Horizontal Solar Water Storage Tank, Appl. Energy, vol. 52, no. 2, pp. 185–197, 1995.

  13. Jannatabadi, M. and Taherian, H., An Experimental Study of Infl uence of Hot Water Consumption Rate on the Thermal Stratifi - cation inside a Horizontal Mantle Storage Tank, Heat Mass Transf., vol. 48, no. 7, pp. 1103–1112, 2012.

  14. Jannatabadi, M., An Experimental Study of Hot Water Consumption on the Thermal Performance of a Horizontal Mantle Tank, World Appl. Sci. J., vol. 19, no. 9, pp. 1322–1326, 2012.

  15. Kalogirou, S.A. and Papamarcou, C., Modeling of a Thermosyphon Solar Water Heating System and Simple Model Validation, Renew. Energy, vol. 21, no. 3, pp. 471–493, 2000.

  16. Khalifa, N. and Mehdi, M.M., On the Verifi cation of One-Dimensional Heat Flow in a Horizontal Thermosyphon Storage Tank, Energy Convers. Manage., vol. 40, no. 9, pp. 961–974, 1999.

  17. Liu, W., Davidson, J.H., Kulacki, F.A., and Mantell, S.C., Natural Convection from a Horizontal Tube Heat Exchanger Immersed in a Tilted Enclosure, J. Solar Energy Eng., vol. 125, no. 1, pp. 65–74, 2002.

  18. Madhlopa, A., Mgawi, R., and Taulo, J., Experimental Study of Temperature Stratifi cation in an Integrated Collector–Storage Solar Water Heater with Two Horizontal Tanks, Solar Energy, vol. 80, no. 8, pp. 989–1002, 2006.

  19. Morrison, G.L., Nasr, A., Behnia, M., and Rosengarten, G., Analysis of Horizontal Mantle Heat Exchangers in Solar Water Heating Systems, Solar Energy, vol. 64, no. 1, pp. 19–31, 1998.

  20. Morrison, G.L. Rosengarten, G. and Behnia, M., Mantle Heat Exchangers for Horizontal Tank Thermosyphon Solar Water Heaters, Solar Energy, vol. 67, no. 1, pp. 53–64, 1999.

  21. Rosengarten, G., Behnia, M., and Morrison, G., Some Aspects Concerning Modeling the Flow and Heat Transfer in Horizontal Mantle Heat Exchangers in Solar Water Heaters, Int. J. Energy Res., vol. 23, no. 11, pp. 1007–1016, 1999.

  22. Rosengarten, G., Morrison, G.L., and Behnia, M., Mixed Convection in a Narrow Rectangular Cavity with Bottom Inlet and Outlet, Int. J. Heat Fluid Flow, vol. 22, no. 2, pp. 168–179, 2001.

  23. Tripanagnostopoulos, Y. and Souliotis, M., ICS Solar Systems with Horizontal (E–W) and Vertical (N–S) Cylindrical Water Storage Tank, Renew. Energy, vol. 29, no. 1, pp. 73–96, 2004.

  24. Tripanagnostopoulos, Y. and Souliotis, M., ICS Solar Systems with Horizontal Cylindrical Storage Tank and Refl ector of CPC or Involute Geometry, Renew. Energy, vol. 29, no. 1, pp. 13–38, 2004.

  25. Young, M.F. and Baughn, J.W., An Investigation of Thermal Stratifi cation in Horizontal Storage Tanks, J. Solar Energy Eng., vol. 103, no. 4, pp. 286–290, 1981.

  26. Zerrouki, A., Boumédien, A., and Bouhadef, K., The Natural Circulation Solar Water Heater Model with Linear Temperature Distribution, Renew. Energy, vol. 26, no. 4, pp. 549–559, 2002.

Articles with similar content:

Second Thermal and Fluids Engineering Conference, Vol.14, 2017, issue
Robert W. Peters, Hessam Taherian, Zhuo Li
Atomization and Sprays, Vol.22, 2012, issue 5
Hocine Mzad, Mohamed Elguerri
Numerical Investigation of Heat Transfer in a Circular Pipe with Angled Turbulators
Journal of Enhanced Heat Transfer, Vol.14, 2007, issue 2
Selahaddin Orhan Akansu, Nafiz Kahraman, Ufuk Sekmen
Air-Conditioning Cooling Load and Petrol-Ethanol Mixtures in Engines Impact on Global Climate Change
International Journal of Fluid Mechanics Research, Vol.38, 2011, issue 2
J. A. Olorunmaiye, D. O. Ariyo, A. D. Ogunshola, K. R. Ajao
A Report on Thermophilic Cyanophyta (Cyanobacteria) from Jakrem Hotspring, Meghalaya
International Journal on Algae, Vol.13, 2011, issue 2
Hygina Siangbood, P. Ramanujam