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Utilizing Asphalt Heat Energy in Finnish Climate Conditions

Author

Listed:
  • Anne Mäkiranta

    (School of Technology and Innovations, University of Vaasa, 65101 Vaasa, Finland)

  • Erkki Hiltunen

    (School of Technology and Innovations, University of Vaasa, 65101 Vaasa, Finland)

Abstract

Geothermal energy is a form of renewable energy, which offers carbon-free solutions for heating and cooling spaces. This study evaluates the use of renewable asphalt heat energy in frozen ground conditions. Asphalt heat energy can be harnessed using a low-energy network, heat collection pipes and heat pumps. This study measured temperatures under the asphalt layer during a three-year period between 2014 and 2017. Measurements were made using a distributed temperature sensing method based on light scattering. Temperatures taken at four different depths under the asphalt (0.5 m, 1.0 m, 3.0 m and 10 m) are presented here. These temperatures are compared with that detected at the depth at which the temperature remains constant all year round. The temperature difference curve between 0.5 m depth and the constant soil temperature depth indicates that from April to October the soil at 0.5 m depth is warming and the temperature difference is positive, even as much as 18 °C. Instead, at the 3.0 m depth, the difference curve is smoother and it varies only from −5 to +5 °C. It is positive from June to November. The surface layer (0 m–1.0 m) is suitable for harvesting heat that can be stored in a deeper (1.5 m–3.0 m) purpose-built storage or in a bedrock heat battery. The calculated heat capacities indicate that asphalt energy, because of high temperatures, is a noteworthy renewable energy source.

Suggested Citation

  • Anne Mäkiranta & Erkki Hiltunen, 2019. "Utilizing Asphalt Heat Energy in Finnish Climate Conditions," Energies, MDPI, vol. 12(11), pages 1-11, June.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:11:p:2101-:d:236327
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    References listed on IDEAS

    as
    1. Florides, Georgios & Kalogirou, Soteris, 2007. "Ground heat exchangers—A review of systems, models and applications," Renewable Energy, Elsevier, vol. 32(15), pages 2461-2478.
    2. Pascual-Muñoz, P. & Castro-Fresno, D. & Serrano-Bravo, P. & Alonso-Estébanez, A., 2013. "Thermal and hydraulic analysis of multilayered asphalt pavements as active solar collectors," Applied Energy, Elsevier, vol. 111(C), pages 324-332.
    3. Zhou, Zhihua & Wang, Xiaojuan & Zhang, Xiaoyan & Chen, Guanyi & Zuo, Jian & Pullen, Stephen, 2015. "Effectiveness of pavement-solar energy system – An experimental study," Applied Energy, Elsevier, vol. 138(C), pages 1-10.
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    Cited by:

    1. Yuanlong Cui & Fan Zhang & Yiming Shao & Ssennoga Twaha & Hui Tong, 2022. "Techno-Economic Comprehensive Review of State-of-the-Art Geothermal and Solar Roadway Energy Systems," Sustainability, MDPI, vol. 14(17), pages 1-50, September.
    2. Chen, Lin & Lai, Yuanming & Fortier, Daniel & Harris, Stuart A., 2022. "Impacts of snow cover on the pattern and velocity of air flow in air convection embankments of sub-Arctic regions," Renewable Energy, Elsevier, vol. 199(C), pages 1033-1046.
    3. Caner Çuhac & Anne Mäkiranta & Petri Välisuo & Erkki Hiltunen & Mohammed Elmusrati, 2020. "Temperature Measurements on a Solar and Low Enthalpy Geothermal Open-Air Asphalt Surface Platform in a Cold Climate Region," Energies, MDPI, vol. 13(4), pages 1-16, February.

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