Thermophysical optimization of specialized concrete pavement materials for collection of surface heat energy and applications for shallow heat storageTools Dehdezi, Pejman Keikhaei, Hall, Matthew R. and Dawson, Andrew (2011) Thermophysical optimization of specialized concrete pavement materials for collection of surface heat energy and applications for shallow heat storage. Transportation Research Record, 2240 . pp. 96-106. ISSN 2169-4052 Full text not available from this repository.
Official URL: http://trrjournalonline.trb.org/doi/abs/10.3141/2240-13
AbstractThere is great potential to use pavement structures to collect and/or store solar energy for the heating and cooling of adjacent buildings, e.g. airport terminals, shopping malls, etc. Therefore, pavement materials comprising both conventional and unconventional concrete mixtures with a wide range of densities, thermal conductivities, specific heat capacities, and thermal diffusivities were investigated. Their thermo-physical properties were then used as inputs to a one dimensional transient heat transport model in order to evaluate the temperature changes at the various depths at which heat might be abstracted or stored. The results indicated that a high diffusivity pavement, e.g. incorporating high conductive aggregates and/or metallic fibres, can significantly enhance heat transfer as well as reduction of thermal stresses across the concrete slab. On the other hand a low diffusivity concrete can induce a more stable temperature at shallower depth enabling easier heat storage in the pavement as well as helping to reduce the risk of damage due to freeze-thaw cycling in cold regions.
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