Controlling the thermal environment of underground cable lines using the pavement surface radiation properties

Controlling the thermal environment of underground cable lines using the pavement surface radiation properties

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Generation, Transmission & Distribution — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The main purpose of this study is to show how the emissivity and absorptivity of a pavement surface above underground cables affect their ampacity. The use of cool pavements whose surfaces absorb less heat from the Sun than they emit to the ambient is considered as a novel method to control the thermal environment of underground cables. The method predicts that the trench along the entire length of a 110 kV cable line is completely filled with quartz sand and paved with a cool pavement. Quartz sand would provide good conduction of heat from the cables to the earth and pavement surfaces, while a paved surface of the trench would establish approximately unchangeable convection and radiation boundary conditions along the entire cable line route. It is assumed that the three-phase system is balanced and that the boundary conditions along the earth and pavement surfaces are the most unfavourable. The novel method is based on the results of experimental research, generalised and verified numerically using the finite-element method in COMSOL. Finally, it is established that the ampacity of the 110 kV cable line can be increased up to 26.7%.


    1. 1)
      • 1. Al-Saud, M.S., El-Kady, M.A., Findlay, R.D.: ‘A new approach to underground cable performance assessment’, Electr. Power Syst. Res., 2008, 78, (5), pp. 907918.
    2. 2)
      • 2. Nahman, J., Tanaskovic, M.: ‘Calculation of the ampacity of high voltage cables by accounting for radiation and solar heating effects using FEM’, Int. Trans. Electr. Energy Syst., 2013, 23, (3), pp. 301314.
    3. 3)
      • 3. Klimenta, D., Nikolajević, S., Sredojević, M.: ‘Controlling the thermal environment in hot spots of buried power cables’, Eur. Trans. Electr. Power, 2007, 17, (5), pp. 427449.
    4. 4)
      • 4. Dubitsky, S., Greshnyakov, G., Korovkin, N.: ‘Multiphysics finite element analysis of underground power cable ampacity’. Proc. 2014 Int. Conf. Energy, Environment and Material Science (EEMAS ‘14), Saint Petersburg, Russia, 23–25 September 2014, pp. 8489.
    5. 5)
      • 5. Rerak, M., Ocłoń, P.: ‘The effect of soil and cable backfill thermal conductivity on the temperature distribution in underground cable system’. 2017, vol. 13, Article No. 02004, E3S Web Conf., 4th Scientific and Technical Conference on Modern Technologies and Energy Systems, WTiUE, Cracow, Poland, October 2016, pp. 16, doi: 10.1051/e3sconf/20171302004.
    6. 6)
      • 6. Klimenta, D., Perovic, B., Jevtic, M., et al: ‘A thermal FEM-based procedure for the design of energy-efficient underground cable lines’, Humanities Sci. Univ. J. Technics, 2014, 10, pp. 162188.
    7. 7)
      • 7. International Standard IEC 60287–1-1:2006+AMD1:2014 CSV: ‘Electric cables – calculation of the current rating – part 1-1: current rating (100% load factor) and calculation of losses – General’ (International Electrotechnical Commission, Switzerland, 2014, 2.1 edn.).
    8. 8)
      • 8. COMSOL: ‘Heat transfer module user's guide’, Version 4.3, May 2012.
    9. 9)
      • 9. Çengel, Y.A.: ‘Introduction to thermodynamics and heat transfer’ (The McGraw-Hill Companies Inc., USA, 2008, 2nd edn.).
    10. 10)
      • 10. Andersland, O.B., Ladanyi, B.: ‘Frozen ground engineering’ (John Wiley & Sons, Hoboken, NJ, USA, 2003, 2nd edn.).
    11. 11)
      • 11. Seemann, S.W., Borbas, E.E., Knuteson, R.O., et al: ‘Development of a global infrared land surface emissivity database for application to clear sky sounding retrievals from multispectral satellite radiance measurements’, J. Appl. Meteorol. Climatol., 2008, 47, pp. 108123.
    12. 12)
      • 12. Tan, S.-A., Fwa, T.-F.: ‘Influence of pavement materials on the thermal environment of outdoor spaces’, Build. Environ., 1992, 27, (3), pp. 289295.
    13. 13)
      • 13. Smith, J.O.: ‘Determination of the convective heat transfer coefficients from the surfaces of buildings within urban street canyons’. PhD thesis, University of Bath, 2010.
    14. 14)
      • 14. Herb, W.R., Janke, B., Mohseni, O., et al: ‘All-weather ground surface temperature simulation’. Project Report No. 478, St. Anthony Falls Laboratory, University of Minnesota, September 2006.
    15. 15)
      • 15. Gouda, O.E., Amer, G.M., El Dein, A.Z.: ‘Effect of dry zone formation around underground power cables on their ratings’. 20th Int. Conf. Electricity Distribution, Session 1, Paper 0120, Prague, Czech Republic, June 2009.
    16. 16)
      • 16. Gouda, O.E., El Dein, A.Z., Amer, G.M.: ‘Effect of the formation of the dry zone around underground power cables on their ratings’, IEEE Trans. Power Deliv., 2011, 26, (2), pp. 972978.

Related content

This is a required field
Please enter a valid email address