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Full-Scale Demonstration of Combined Ground Source Heating and Sustainable Urban Drainage in Roadbeds

Author

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  • Søren Erbs Poulsen

    (R&D Centre for the Built Environment, Energy, Water and Climate, VIA University College, 8700 Horsens, Denmark)

  • Theis Raaschou Andersen

    (R&D Centre for the Built Environment, Energy, Water and Climate, VIA University College, 8700 Horsens, Denmark)

  • Karl Woldum Tordrup

    (R&D Centre for the Built Environment, Energy, Water and Climate, VIA University College, 8700 Horsens, Denmark)

Abstract

This paper proposes and demonstrates, in full scale, a novel type of energy geostructure (“the Climate Road”) that combines a ground-source heat pump (GSHP) with a sustainable urban drainage system (SUDS) by utilizing the gravel roadbed simultaneously as an energy source and a rainwater retarding basin. The Climate Road measures 50 m × 8 m × 1 m (length, width, depth, respectively) and has 800 m of geothermal piping embedded in the roadbed, serving as the heat collector for a GSHP that supplies a nearby kindergarten with domestic hot water and space heating. Model analysis of operational data from 2018–2021 indicates sustainable annual heat production levels of around 0.6 MWh per meter road, with a COP of 2.9–3.1. The continued infiltration of rainwater into the roadbed increases the amount of extractable heat by an estimated 17% compared to the case of zero infiltration. Using the developed model for scenario analysis, we find that draining rainwater from three single-family houses and storing 30% of the annual heating consumption in the roadbed increases the predicted extractable energy by 56% compared to zero infiltration with no seasonal energy storage. The Climate Road is capable of supplying three new single-family houses with heating, cooling, and rainwater management year-round.

Suggested Citation

  • Søren Erbs Poulsen & Theis Raaschou Andersen & Karl Woldum Tordrup, 2022. "Full-Scale Demonstration of Combined Ground Source Heating and Sustainable Urban Drainage in Roadbeds," Energies, MDPI, vol. 15(12), pages 1-21, June.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:12:p:4505-:d:843520
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    References listed on IDEAS

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    1. Marco Pellegrini & Augusto Bianchini, 2018. "The Innovative Concept of Cold District Heating Networks: A Literature Review," Energies, MDPI, vol. 11(1), pages 1-16, January.
    2. Poulsen, S.E. & Alberdi-Pagola, M., 2015. "Interpretation of ongoing thermal response tests of vertical (BHE) borehole heat exchangers with predictive uncertainty based stopping criterion," Energy, Elsevier, vol. 88(C), pages 157-167.
    3. Søren Erbs Poulsen & Maria Alberdi-Pagola & Davide Cerra & Anna Magrini, 2019. "An Experimental and Numerical Case Study of Passive Building Cooling with Foundation Pile Heat Exchangers in Denmark," Energies, MDPI, vol. 12(14), pages 1-18, July.
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