Construction and configuration of convection-powered asphalt solar collectors for the reduction of urban temperatures

Chiarelli, Andrea and Al-Mohammedawi, A. and Dawson, Andrew and Garcia, Alvaro (2017) Construction and configuration of convection-powered asphalt solar collectors for the reduction of urban temperatures. International Journal of Thermal Sciences, 112 . pp. 242-251. ISSN 1290-0729

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Abstract

In this paper, an analysis of a convection-powered asphalt solar collector prototype is approached by the means of experimental trials and computational fluid dynamics (CFD) simulations in order to evaluate how to optimise its design for the reduction of high urban pavement temperatures. Since the energy harvesting setup consists of a series of pipes buried in the pavement, their arrangement is here studied and experimentally compared to a possible construction technique consisting of concrete corrugations that aim at replacing the pipes. CFD simulations are employed to optimise the air collection chamber which is placed immediately before the heated air leaves the asphalt solar collector prototype. The data gathered is analysed in terms of energy harvested and exergy.

The results obtained show that for an overall optimal performance, pipes should be installed in a single row under the pavement wearing course. This allowed a surface temperature reduction of up to 5.5 °C in the pavement prototype studied and the highest absorbed energy and exergy measured. In addition, the CFD simulations showed that care has to be put in finding the optimal shape and size for the air collection chamber, as they significantly influence the behaviour of the system.

Item Type: Article
Keywords: Asphalt solar collector, Air convection, Energy harvesting, Asphalt pavement, CFD
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Civil Engineering
Identification Number: 10.1016/j.ijthermalsci.2016.10.012
Depositing User: Eprints, Support
Date Deposited: 01 Aug 2017 10:02
Last Modified: 12 Oct 2017 23:09
URI: http://eprints.nottingham.ac.uk/id/eprint/44536

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