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Estimation of energy saving of commercial building by living wall and green facade in sub-tropical climate of Australia

Hasan, M. Mahmudul, Karim, Azharul, Brown, Richard J., Perkins, Melinda, & Joyce, Daryl (2012) Estimation of energy saving of commercial building by living wall and green facade in sub-tropical climate of Australia. In Zhang, Huamin (Ed.) The 7th International Green Energy Conference & The 1st DNL Conference on clean energy, IGEC-DCCE, May 28-30, 2012, Dalian, China.

Abstract

This paper investigates energy saving potential of commercial building by living wall and green façade system using Envelope Thermal Transfer Value (ETTV) equation in Sub-tropical climate of Australia. Energy saving of four commercial buildings was quantified by applying living wall and green façade system to the west facing wall. A field experimental facility, from which temperature data of living wall system was collected, was used to quantify wall temperatures and heat gain under controlled conditions. The experimental parameters were accumulated with extensive data of existing commercial building to quantify energy saving. Based on temperature data of living wall system comprised of Australian native plants, equivalent temperature of living wall system has been computed. Then, shading coefficient of plants in green façade system has been included in mathematical equation and in graphical analysis. To minimize the air-conditioned load of commercial building, therefore to minimize the heat gain of commercial building, an analysis of building heat gain reduction by living wall and green façade system has been performed. Overall, cooling energy performance of commercial building before and after living wall and green façade system application has been examined. The quantified energy saving showed that only living wall system on opaque part of west facing wall can save 8-13 % of cooling energy consumption where as only green façade system on opaque part of west facing wall can save 9.5-18% cooling energy consumption of commercial building. Again, green façade system on fenestration system on west facing wall can save 28-35 % of cooling energy consumption where as combination of both living wall on opaque part of west facing wall and green façade on fenestration system on west facing wall can save 35-40% cooling energy consumption of commercial building in sub-tropical climate of Australia.

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ID Code: 48926
Item Type: Conference Paper
Additional Information: Authors have the right to modify and change the item only.
Additional URLs:
Keywords: Living wall, Green facade, Energy Saving, ETTV
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000)
Australian and New Zealand Standard Research Classification > TECHNOLOGY (100000)
Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 The Authors
Copyright Statement: Copying of any portion or copying full of this paper is strictly prohibited.
Deposited On: 02 Mar 2012 08:48
Last Modified: 19 Apr 2013 10:00

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