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The property is located at the foot of the Uetliberg and is bordered to the north by Zwirnerstrasse, which...
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René Schmid Architekten AG, project in Zwirnerstrasse
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Architect René Schmid
A scaled skin solar envelope

The property is located at the foot of the Uetliberg and is bordered to the north by Zwirnerstrasse, which follows the flow of the Sihl River. This apartment building was arranged along the course of the road. The length of the building volume is divided on the street side with a fine bend. The simple building form ends with a classical attic storey. To the south, the building opens up with loggias.
A scaled skin envelops the building with photovoltaic modules. The facade can be stretched and compressed in two dimensions which allows over 95% of the surface to be covered with the same module size. More than 1,000 identical photovoltaic modules are the result of this flexible system, which has a positive effect on the cost structure.

Ground floor layout.

The cell structure disappears behind the light printing on the matt front glass.

View of the north facade.

Building characteristics
  • Building typology
    Residential
  • Construction type
    New
  • Year of construction
    2017
  • Energy reference surface
    1’323 m²
  • Energy index
    n/a kWh/m²a (heating and electricity)
  • Energy labelling
Energy
Active solar surface n/a 402m²
Active solar surface ratio n/a >75%
Peak power n/a 25 kWp
Building skin application Flat roof Cold facade
Storage n/a n/a
Energy production
0
kWh
Source: Bauen & wohnen - Immer warm dank Sonnengas, 15.06.18
Self-consumption
%
Building skin
  • Application
    Standard modules are laid on a metallic support system
  • Description
    Flat concrete roof insulated with mineral wool
  • U value
    n/a
  • Fastening system
    Continuous fixing system (aluminium tracks)
  • Other
  • Application
    PV cladding integrated in a cold facade
  • Description
    Concrete walls insulated with mineral wool.
  • U value
    n/a
  • Fastening system
    Continuous fixing system (aluminium tracks)
  • Other

A scaled skin envelops the building with photovoltaic modules. Photo: Pascal Widerkehr.

  • Application
    Windows
  • Description
    Triple glazing with aluminium frame
  • U value
    n/a

The facade is almost completely covered with solar modules. Photo: Pascal Wiederkehr.

BIPV module
  • Product
    Custom made
  • Manufacturer
    KIOTO Photovoltaics SCHWEIZ GmbH. Facade system developed by René Schmid Architekten AG.
  • Cell technology
    Mono-crystalline
  • Front glass type/customization
    Digital ceramic print on glass/glass BIPV modules
  • Dimensions
    Custom made
  • Specific power
    n/a
Technical details

The mounting system is based on a simple and inexpensive stainless steel hook holder. Each individual hook holds up to four photovoltaic modules. The PV modules are hooked in by hand, which guarantees simple and quick installation. For repairs, a PV module can be replaced just as easily by hand without having to loosen a single screw.

Projection
Hotspot image
Vertical section
Hotspot image
Costs
  • Total cost of the building
    n/a
  • Price per m³  
    n/a

View of the south facade.

Parties involved
  • Owner
    n/a
  • Architect
    René Schmid Architekten AG
  • Project partner
    Umwelt Arena Schweiz
  • Photovoltaic Installer
    n/a
  • Photovoltaic consultant
    n/a
  • Photo
    Beat Bühler
Awards and recognitions
  • Awards

  • Publications
    Bericht NZZ vom 01.02.2018 (only in DE)


    Medienmitteilung der Umweltarena Spreitenbach AG (only in DE)


    Der Landbote vom 26.01.2018 (only in DE)


    Hochparterre (Presseschau) vom 01.02.2018 (only in DE)

Solarchitecture

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