A short description of the NBS project |
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As part of EU Biosolarroofs concept, the project Photovoltaic Roofgardens combines previously separated disciplines as green roof construction, building-integrated photovoltaic systems and roof design. Producing renewable energy, offsetting increasing soil sealing, improving the micro-climate, storing CO2 and rain water and extending the life of the roof membrane – a combined roof system should do all this and much more. The aim of the project is to combine these concepts to develop one holistic system. Synergies will be found between areas that have until now competed with each other. For the development of such a holistic concept, the following comprehensive analysis was carried out: understanding of users and users’ needs, coordination of appropriate vegetation systems in combination with PV shading, effects of shading patterns on people, integration and coordination with the architecture, landscape planning, construction and irrigation concepts as well as cost and revenue. These concepts have been tested using demo simulations. The research project’s initial results were presented at BOKU Wien: the plant-filled roof terrace creates a pleasant, comfortable environment. The photovoltaic pergola with semi-transparent glass-glass modules provides shade and produces green energy. The wooden test facility at BOKU does not yet represent the final architectural design. But it is already clear how the solution works: the previously underutilised terrace has become an attractive recreational and meeting place with a noticeable three to five degree temperature difference. In the test garden, five tons of CO2 are saved every year thanks purely to the photovoltaic system, without taking account of the CO2 retention properties of the plants and soil. The plants also act as a fine dust filter. The final design of the photovoltaic roof garden consists of a green roof structure, a pergola made of wood or steel and a canopy with photovoltaic glass-glass modules. A photovoltaic roof garden unit measures around 56sqm and can be endlessly multiplied. It provides about 5.500 kilowatt hours of green energy a year, or enough to supply one to two households. The costs including plants, steel girder construction and photovoltaic system are around €79.500. At €1.400 per square metre, the photovoltaic roof garden costs roughly the same as a conservatory. But for the same price, it provides both green energy and pleasant, green surroundings. |
Location | Austria, Wien (Austria) |
Latitude | |
Longitude | |
Status | Project delivered (2013-2015) |
Dates |
NBS Scale | object (building, etc.) |
NBS Impacts scale | • Object (building) • Neighbourhood • City |
Urban density/ Soil consumption | High (dense city center) |
Combined with other(s) environmental friendly solution(s)? | |
if other |
Climate Issues | Climate mitigation | |
Climate adaptation | ||
Other | 0 | |
Urban water management and quality | Urban water management and quality | |
Flood management | ||
Other | 0 | |
Air Quality | Air quality at district/city scale | |
Air quality locally | ||
Other | 0 | |
Urban Space and Biodiversity | Biodiversity | |
Urban space design | ||
Urban space management | ||
Other | 0 | |
Urban Regeneration and Soil | Air quality at district/city scale | |
Other | 0 | |
Resource efficiency | Food, energy and water | |
Raw materials | ||
Waste | ||
Recycling | ||
Other | 0 | |
Public health and well-being | Acustic | |
Quality of life | ||
Health | ||
Other | 0 | |
Environmental justice and social cohesion | Environmental Justice: Recognition | |
Environmental Justice: Procedural Justice | ||
Environmental Justice: Distributional Justice | ||
Environmental Justice: Capabilities | ||
Environmental Justice: Responsibility | ||
Social Cohesion | ||
Other | 0 | |
Urban planning and governance | Urban planning and form | |
Governance in planning | ||
Other | 0 | |
People Security | Control of crimes | |
Control of extraordinary events | ||
Other | 0 | |
Green economy | Circular economy | |
Bioeconomy activities | ||
Direct economic value of NBS | ||
Other | 0 | |
Other |
Who Started this initiative? | Community • Research institutions |
Contracting Authority | |
Project manager (leader and main partners): entities names, and know-how involved | |
Who (else) was involved in the project ? (Inhabitants, local association, etc.) | |
More detail on the process and the role of the different stakeholders (How did it happen?) | |
OPTIONAL Considering the actual impacts, who are the primary beneficiaries of the project. |
Cluster | Governance Model | Description |
cluster5_network_governance | Collaborative_governance | This project is funded by the Federal Ministry for Science, Research and Economics and the Austrian Research Promotion Agency. The costs including plants, steel girder construction and photovoltaic system are around €79.500 (€1.400 per square metre). |
Global Estimated cost of the project | 50k€ - 200k€ (€79.500) |
Cluster | cluster1_public_financing |
FM | Public financing |
Description of the financing mechanism | This project is funded by the Federal Ministry for Science, Research and Economics and the Austrian Research Promotion Agency. The costs including plants, steel girder construction and photovoltaic system are around €79.500 (€1.400 per square metre). |
Class | Type | Description |
- |
Expected time for the NBS to be fully effective after its implementation | |
Expected life time of the intervention | |
Already feedbacks on the project? In case, the project has already been adapted to new requisites, please explain the modifications brought |
Class | Subclass | Type | Description |
Knowledge_drivers | Generation of evidence Collaboration Awareness | • Lesson learnt through implemented projects; • Networks; • Climate Change | - |
Governance_drivers | Process efficiencies • Collaboration; Co-creation and participation • Co-production | Process efficiencies • Collaboration; Co-creation and participation • Co-production |
Class | Subclass | Type | Description |
Knowledge_drivers | Uncertainty | • Performance unknown | |
Governance_drivers | Institutional barriers | • Lack of flexibility of decision making structures |
Field | |
Criteria | |
Brief description of the innovativeness | |
Has the project received a prize, an award? | |
Has the project received a media coverage? (in reviews, in press, etc.) |