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Design and Numerical Analysis of an Externally Heated Geothermal Bridge Deck

  • Gang Lei
  • Xinbao Yu
  • Teng Li
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

In winter, ice and snow on pavement slabs and bridge decks cause serious driving conditions to motorist both in safety and ability to accelerate and clime grade. Geothermal energy has gradually emerged as a new heating source for heating bridge decks and pavements to keep bridges and roads free of snow and ice in winter. However, current geothermal bridge deicing design and studies mostly focus on new bridges that hydronic loops are embedded in concrete deck during construction phase, which is considered as internal heating. This paper presents a conceptual design and numerical analyses of external geothermal bridge deck heating that the hydronic loops are attached to the bottom of bridge deck and encapsulated in a layer of geofoam. A series of parametric analyses is performed to investigate the principles of external heating process. The controlling factors, such as ambient temperature, inlet temperature, wind speed, flow velocity, and foam thickness are considered. The results show that the temperature of the proposed external heated bridge deck can rise above freezing in mild winters through heating for at least 3 h. Limitations of the design are also discussed that the proposed heating system would be unfeasible in the area where the ambient temperature and inlet temperature are lower than −2 and 12 °C, respectively, and wind speed is higher than 6 m/s. It is also found that foam thickness slightly affects the heating process.

Notes

Acknowledgements

The authors appreciate the financial support of this research from Texas Department of Transportation, USA.

References

  1. Abraham, S.P., Abdelaziz, S.L., Longtin, J.: Heat Exchangers for pavement surface de-icing. In: Geo-Chicago 2016 Technical Papers, ASCE (2016).  https://doi.org/10.1061/9780784480137.060
  2. Baboian, R.: Environmental conditions affecting transport infrastructure, Materials Performance, NACE (1995)Google Scholar
  3. Bowers, G.A. Jr., Olgun, C.: Ground-source bridge deck deicing systems using energy foundations. In: Geo-Congress 2014 Technical Papers, ASCE (2014).  https://doi.org/10.1061/9780784413272.261
  4. Cady, P.D., Weyers, R.E.: Chloride penetration and deterioration of concrete bridge decks. In: Cement, Concrete and Aggregates. ASTM (1983).  https://doi.org/10.1520/cca10258j
  5. Chen, M., Wu, S., Wang, H., Zhang, J.: Study of ice and snow melting process on conductive asphalt solar collector. Solar Energy Mater. Solar Cells (2011).  https://doi.org/10.1016/j.solmat.2011.07.013CrossRefGoogle Scholar
  6. COMSOL.: COMSOL Multiphysics version 5.2a: user’s guide and reference manual. COMSOL, Burlington (2016)Google Scholar
  7. Eugster, W.: Road and bridge heating using geothermal energy. overview and examples. In: Proceedings European Geothermal Congress (2007)Google Scholar
  8. Eugster, W., Schatzmann, J.: Harnessing solar energy for winter road clearing on heavily loaded expressways. In: Proceedings of XI’th PIARC International Winter Road Congress (2002)Google Scholar
  9. Han, C.J., Yu, X.: Feasibility of geothermal heat exchanger pile-based bridge deck snow melting system: a simulation based analysis. Renew. Energy (2017).  https://doi.org/10.1016/j.renene.2016.08.062CrossRefGoogle Scholar
  10. Liu, X., Rees, S., Spitler, J.: Simulation of a geothermal bridge deck anti-icing system and experimental validation. In: Proceedings of Transportation Research Board 82nd Annual Meeting. TRB (2003)Google Scholar
  11. Merrill, B. D.: Texas’ use of precast concrete stay-in-place forms for bridge decks. In: Proceedings of Concrete Bridge Conference, National Concrete Bridge Council (2002)Google Scholar
  12. Rees, S.J., Spitler, J.D., Xiao, X.: Transient analysis of snow-melting system performance. In: Proceedings of ASHRAE Transactions 2002. ASHRAE (2002)Google Scholar
  13. Wang, H., Wu, S., Chen, M., Zhang, Y.: Numerical simulation on the thermal response of heat-conducting asphalt pavements. In: Proceedings of 3rd International Symposium on Functional Materials 2009. IOP Publishing (2009).  https://doi.org/10.1088/0031-8949
  14. Zhang, N., Yu, X.B., Li, T.: Numerical simulation of geothermal heated bridge deck. In: Proceedings of 2017 International Conference on Transportation Infrastructure and Materials, DEStech Publications (2017).  https://doi.org/10.12783/dtmse/ictim2017/9952

Copyright information

© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Civil EngineeringUniversity of Texas at ArlingtonArlingtonUSA

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