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

Elmira Jamei (), Gokul Thirunavukkarasu, Majed Abuseif, Mehdi Seyedmahmoudian, Saad Mekhilef, Alex Stojcevski and Hing-Wah Chau
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Elmira Jamei: College of Sport, Health, and Engineering, Victoria University, Melbourne, VIC 3011, Australia
Gokul Thirunavukkarasu: Siemens-Swinburne Energy Transition Hub, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, VIC 3122, Australia
Majed Abuseif: School of Law and Society, University of the Sunshine Coast, Sunshine Coast, QLD 4556, Australia
Mehdi Seyedmahmoudian: Siemens-Swinburne Energy Transition Hub, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, VIC 3122, Australia
Saad Mekhilef: Siemens-Swinburne Energy Transition Hub, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, VIC 3122, Australia
Alex Stojcevski: Siemens-Swinburne Energy Transition Hub, School of Science, Computing and Engineering Technologies, Swinburne University of Technology, Melbourne, VIC 3122, Australia
Hing-Wah Chau: College of Sport, Health, and Engineering, Victoria University, Melbourne, VIC 3011, Australia

Land, 2023, vol. 12, issue 12, 1-19

Abstract: 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.

Keywords: energy performance; EnergyPlus; green roof; Leaf Area Index; urban planning (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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