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Numerical Investigation of Harvesting Solar Energy and Anti-Icing Road Surfaces Using a Hydronic Heating Pavement and Borehole Thermal Energy Storage.
- Source :
-
Energies (19961073) . Dec2018, Vol. 11 Issue 12, p3443. 1p. 8 Diagrams, 4 Charts, 4 Graphs, 1 Map. - Publication Year :
- 2018
-
Abstract
- Hydronic Heating Pavement (HHP) is an environmentally friendly method for anti-icing the roads. The HHP system harvests solar energy during summer, stores it in a Seasonal Thermal Energy Storage (STES) and releases the stored energy for anti-icing the road surface during winter. The aims of this study are to investigate: (i) the feasibility of HHP system with low fluid temperature for harvesting solar energy and anti-icing the road surface; and (ii) the long-term operation of the STES. In this study, a Borehole Thermal Energy Storage (BTES) is considered to be the STES. The HHP system and the BTES are decoupled from each other and their performances are investigated separately. A hybrid 3D numerical simulation model is developed to analyze the operation of the HHP system. Moreover, a 3D numerical simulation model is made to calculate the temperature evolution at the borehole walls of the BTES. The climate data are obtained from Östersund, a city in the middle of Sweden with long and cold winter periods. Considering the HHP system with the inlet fluid temperature of 4 °C, the road area of 50 m × 3.5 m as well as the BTES with 20 boreholes and 200 m depth, the result showed that the harvested solar energy during summer is 352.1   kWh / (m 2 · year) , the required energy for anti-icing the road surface is 81.2   kWh / (m 2 · year) and the average temperature variation at the borehole walls after 50 years is +0.5 °C. Installing the HHP system in the road leads to a 1725 h shorter remaining number of hours of slippery condition on the road surface during winter and a 5.1 °C lower temperature on the road surface during summer, compared to a road without the HHP system. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HEAT transfer
*BOREHOLES
*SOLAR energy
*HEAT storage
*THERMAL properties
Subjects
Details
- Language :
- English
- ISSN :
- 19961073
- Volume :
- 11
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Energies (19961073)
- Publication Type :
- Academic Journal
- Accession number :
- 133723479
- Full Text :
- https://doi.org/10.3390/en11123443