Estimating the Effect of Green Roofs on a City's Energy Footprint

T.G. Myers, Neville Fowkes, A. G. Fareo, S Goqo

Research output: Chapter in Book/Conference paperConference paper


The temperature generated (and hence energy stored) in a solid layer subjected to sunshine is examined. Two models are developed which permit the calculation of the temperature from the surface to far into the ground. By varying parameters we can replicate heat flow in soil or concrete, there is also the option to include evaporation and evapotranspiration. The results obtained indicate that significant temperature reductions and energy storage in the solid layer can be achieved by a sensible choice of roof covering and composition. The models are one-dimensional but it is a simple matter to extend the calculations to deal with a patchwork quilt of surfaces as would be present in a city. Recommendations are given to reduce heat storage in a city and also on future model improvements.
Original languageEnglish
Title of host publicationProceedings of the Mathematics in Industry Study Group 2020
PublisherUniversity of the Witwatersrand
Publication statusPublished - 2020
Event2020 Mathematics in Industry Study Group - University of Newcastle, Newcastle, Australia
Duration: 28 Jan 20201 Feb 2020


Conference2020 Mathematics in Industry Study Group
Abbreviated titleMISG 2020

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