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Developing a one-dimensional heat and mass transfer algorithm for describing the effect of green roofs on the built environment: Comparison of experimental results

Jones, Phillip John and Alexandri, Eleftheria 2006. Developing a one-dimensional heat and mass transfer algorithm for describing the effect of green roofs on the built environment: Comparison of experimental results. Building and Environment 42 (8) , 2835 -2849. 10.1016/j.buildenv.2006.07.004

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Abstract

This paper investigates the mathematical modelling of the effect of green roofs on mitigating raised urban temperatures. A dynamic, one-dimensional model is developed, describing heat and mass transfer in building materials, considered as capillary-porous bodies, the vegetated canopy, modelled as a combined plant–air canopy layer, the soil and the air. The model is validated with an experiment, conducted in the Welsh School of Architecture, in Cardiff, in summer 2004. The right choice of parameters that affect the accuracy of the model (such as the expression of the convective heat transfer coefficient and stomatal resistance) is discussed. Special attention is given to the comparison between the experimental results and the outputs of only heat transfer algorithms and heat and mass transfer expressions. Taking these comparisons into consideration, conclusions are drawn about developing an accurate algorithm describing the thermal effect of green roofs on the built microclimate.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Architecture
Subjects: T Technology > T Technology (General)
T Technology > TH Building construction
Uncontrolled Keywords: Green roofs; Heat and mass transfer; Dynamic microclimatic model
Publisher: Elsevier
ISSN: 0360-1323
Last Modified: 11 Oct 2017 02:01
URI: http://orca.cf.ac.uk/id/eprint/2206

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