Application of retro-reflective materials in urban canyon at different geographical locations

Castellani, Beatrice

doi:10.1016/j.buildenv.2021.107676

Cited by 9 publications

(2 citation statements)

References 41 publications

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“…In fact, RR coatings could contribute to decrease the energy entrapped inside an urban canyon, due to their angular properties of reflection. The application of RR both on walls and pavements of the urban canyon could provide a better mitigation of UHI, avoiding multiple reflections between facing surfaces [12][13][14][15][16][17]22]. Furthermore, RR materials could be used in combination with diffusive materials in photovoltaic fields, in order to increase the electric energy produced by the downward facing panel of a bifacial photovoltaic system.…”

Section: Motivationmentioning

confidence: 99%

The Effect of the Substrate on the Optic Performance of Retro-Reflective Coatings: An In-Lab Investigation

Giuseppe¹,

Cardinali²,

Castellani

et al. 2021

Energies

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Retro-reflectivity is a promising surface capability, which has attracted the interest of researchers for building applications in order to counteract Urban Heat Island (UHI) effects. This work aims at studying the impact of the substrate material on the optic performance of retro-reflective (RR) coatings. Three types of substrate materials were investigated: smooth pine wood panels, rough plywood panels, and smooth acetate sheets. The RR coating samples were made by firstly adding a high reflective white paint onto the substrate material and a homogeneous RR glass beads layer on the top. As a reference case, also diffusive samples, without RR beads, were developed. Samples have been tested through a spectrophotometric and an angular reflectivity analysis. Results show that, despite a lower global reflectance of the RR samples with respect to the diffusive ones, the glass beads coating provides a good retro-reflective capability to all the diffusive samples. Additionally, the roughest RR sample exhibited the highest RR capability of up to 16%, with respect to the other smoother samples. Future developments may involve the optimum design of RR coatings, in terms of their optic performance by varying the substrate materials and roughness, the glass beads density and dimension.

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Section: Motivationmentioning

confidence: 99%

The Effect of the Substrate on the Optic Performance of Retro-Reflective Coatings: An In-Lab Investigation

Giuseppe¹,

Cardinali²,

Castellani

et al. 2021

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…One is the industrial development of the RR material, based on the design of layers (type of support, microspheres’ superficial density and diameter) and on the characterization of the samples in terms of optic-energy performance [ [27] , [28] , [29] ]. Another paper focused on the effect of the RR materials in function of the geographical locations, showing that RR have an important cooling effect at middle or high latitudes while there are no benefits comparing to diffusive materials at very low latitudes [ 30 ]. At the middle latitudes, with hot arid climate, a highly reflective RR coating on the south-facing facade and roof reduces the annual cooling load up to 26 % [ 31 ].…”

Section: Introductionmentioning

confidence: 99%