Multi-physics fem model of solar hybrid roads for energy harvesting performance evaluation in presence of semi-transparent or opaque pavement surface layer

Nicolas Le Touz (1, 2) , Jean Dumoulin (1, 2) , Jean Michel Piau (3)

1 IFSTTAR/COSYS/SII - Structure et Instrumentation Intégrée
2 I4S - Statistical Inference for Structural Health Monitoring
3 IFSTTAR/MAST/LAMES - Laboratoire Auscultation, Modélisation, Expérimentation des infrastructures de transport

We present in this paper the concept of solar hybrid road and focus on the thermal performances of such system. Main differences between these multi-layer structures with traditional road structures come from the pavement surface, which can be opaque or semi-transparent and the porous sub-layer, submitted to fluid flow. These structures aim at collecting solar energy during the summer season, what helps also to prevent from a too high temperature and urban heat island effect. A finite element model is presented to couple thermal diffusion, hydraulic convection and radiative transfer. This numerical model allows to compute the temperature field for different weather conditions and also to evaluate the thermal performances of the system. Annual simulations are performed and a comparison between two surface layer solutions for different locations and climates is presented and discussed.

Mots clés: POROUS MEDIA; COMPUTATIONAL METHODS; ENERGY EFFICIENCY; MULTI-PHYSICS HEAT TRANSFER; SOLAR HYBRID ROAD; ENERGY HARVESTING; FINITE ELEMENT MODEL

Mots clés: MILIEU POREUX

Domaines: Sciences de l'ingénieur [physics]

Nicolas Le Touz, Jean Dumoulin, Jean Michel Piau. Multi-physics fem model of solar hybrid roads for energy harvesting performance evaluation in presence of semi-transparent or opaque pavement surface layer. IHTC 2018, 16th International Heat Transfer Conference, Aug 2018, Beijing, China. 6p. ⟨hal-01891242⟩