Simulation and Analysis of Urban Green Roofs with Photovoltaic in the Framework of Water-Energy Nexus

Bao, Keyu and Thrän, Daniela and Schröter, Bastian (2021) Simulation and Analysis of Urban Green Roofs with Photovoltaic in the Framework of Water-Energy Nexus. CITIES 20.50 – Creating Habitats for the 3rd Millennium: Smart – Sustainable – Climate Neutral. Proceedings of REAL CORP 2021, 26th International Conference on Urban Development, Regional Planning and Information Society. pp. 671-680. ISSN 2521-3938

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Abstract

Urban green infrastructures such as green roofs can reduce building energy demand, mitigate rainfall run-off and improve urban air quality. On the other hand, decentralized renewable energy systems such as rooftop photovoltaics (PV), are one of the key actions towards reducing a building’s energy dependence and greenhouse gas emissions. This study assesses the technical and economic benefits of a combination of green roofs and PV systems and thereby considers increased PV yields, decreased building heat demands, and reduced rainwater runoff mitigation, that can stem from this combination. For this, two workflows within an urban simulation environment, SimStadt, were applied and extended for two city quarters in Stuttgart, Germany. The results show that by installing green roofs with PV systems where possible, annual PV yields increase by about 0.3%, annual space heating demands decrease by 0.1 %, and 30 % of rainwater runoff can be avoided in the case study areas. The economic cost-benefit analysis, however, shows that only around 31% of the initial investment can be recurred over the assets’ lifetime.

Item Type: Article
Uncontrolled Keywords: Simulation, Urban green infrastructure, Analysis, Water-Energy Nexus, Green roof with PV
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QA Mathematics > QA76 Computer software
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Depositing User: REAL CORP Administrator
Date Deposited: 04 Oct 2021 13:46
Last Modified: 17 Oct 2021 17:41
URI: http://repository.corp.at/id/eprint/796

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