Electricity demand reduction in Sydney and Darwin with local climate mitigation

  • YEAR
    2018
  • AUTHORS
    Paolini, Riccardo
    Haddad, Shamila
    Synnefa, Afroditi
    Garshasbi, Samira
    Santamouris, Mat
  • CATEGORIES
    2018 Conference Papers
    Architectural Science: Building and Energy
    Conference Papers

Extract

Urban overheating in synergy with global climate change will be enhanced by the increasing population density and increased land use in Australian Capital Cities, boosting the total and peak electricity demand. Here we assess the relation between ambient conditions and electricity demand in Sydney and Darwin and the impact of local climate mitigation strategies including greenery, cool materials, water and their combined use at precinct scale. By means of a genetic algorithm, we produced two site-specific surrogate models, for New South Wales and Darwin CBD, to compute the electricity demand as a function of air temperature, humidity and incoming solar radiation. For Western Sydney, the total electricity savings computed under the different mitigation scenarios range between 0.52 and 0.91 TWh for the summer of 2016/2017, namely 4.5 % of the total, with the most relevant saving concerning the peak demand, equal to 9 % with cool materials and water sprinkling. In Darwin, the computed peak electricity demand is of 2 % with respect to the unmitigated condition. Greater savings could be achieved acting on the demand linked to hot and humid conditions.

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