Simulation-Based Study on the Effect of Green Roofs on Summer Energy Performance in Melbourne

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Jamei, Elmira ORCID: 0000-0002-4270-0326, Thirunavukkarasu, Gokul Sidarth ORCID: 0000-0002-5126-5979, Abuseif, Majed ORCID: 0000-0001-8261-8418, Seyedmahmoudian, Mehdi, Mekhilef, Saad ORCID: 0000-0001-8544-8995, Stojcevski, Alex and Chau, Hing-Wah ORCID: 0000-0002-3501-9882 (2023) Simulation-Based Study on the Effect of Green Roofs on Summer Energy Performance in Melbourne. Land, 12 (12). ISSN 2073-445X


Green roofs are increasingly recognised as a crucial urban solution, addressing climate change, enhancing energy efficiency, and promoting sustainable architecture in densely populated areas. In this manuscript, the research study delves into the influence of green roofs on energy consumption, focusing on the Treasury Place building in Melbourne, Australia. The utilisation of DesignBuilder and EnergyPlus simulations was explored. Various green roof parameters such as the Leaf Area Index (LAI), plant height, soil moisture, and tree coverage were optimised and compared against base case scenarios. The key findings indicate an optimal LAI of 1.08 for maximum energy savings, with diminishing returns beyond an LAI of 2.5. The soil moisture content was most effective, around 50%, while a plant height of approximately 0.33 m optimised energy reduction. The introduction of 50% canopy tree coverage provided temperature regulation, but increased soil moisture due to trees and their influence on wind flow had an adverse energy impact. These results emphasise the necessity for precise green roof representation and parameter optimisation for maximum energy efficiency. This research offers essential insights for those in urban planning and building design, endorsing green roofs as a pivotal solution for sustainable urban environments.

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Item type Article
DOI 10.3390/land12122105
Official URL
Subjects Current > FOR (2020) Classification > 4005 Civil engineering
Current > Division/Research > College of Science and Engineering
Current > Division/Research > Institute for Sustainable Industries and Liveable Cities
Keywords energy performance; EnergyPlus; green roof; Leaf Area Index; urban planning
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