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2017 - Grosspeter Tower

Data

Location: Basel (CH)
Construction type: New
Architect: Burckhardt+Partner AG
Year of construction: 2013-2017
Building typology: Administrative and commercial (mixed)
Building skin application: Cold facade
PV module: ultra-lightweight solar module using thin-film technology (CIS)
Orientation: North, South, East, West
Tilt angle: 90° (facade)
PV surface: 770 m² (roof); 4800 m² (facade)
Nominal power: 100 kWp (roof); 440 kWp (facade)
Energy production: 252000 kWh/yr
Final yield: 467 kWh/kWp
Active solar ratio: 25-50%

Description

The 21-story Grosspeter tower in Basel has a 440 kW photovoltaic system that uses all sides of the solar facade. The well-integrated facade systems, together with the 100 kW system on the roof, have a power of 540 kW generating a total of about 252,000 kWh per year. With a total energy requirement of 903,500 kWh/yr, this translates into a 28% self-generated energy supply. The building’s heat requirement is covered by solar-powered geothermal probes. The pedestal of the building is used as a hotel and an office tower.

Analysis

SOLAR ARCHITECTURE

Energy and architectural concept – Energy optimized
– Maximum power		 – Partially adapted to building skin
– Roof		 – Partially adapted to building skin
– Facade		 – Total building skin
Energy and architectural language – Evident emphasized PV – Low recognizable PV – Hidden PV Mimicry

SOLAR AND BUILDING SKIN

Standardization vs customization – Standard PV components – Low customized components – Highly customized components
Building skin technology – Roof added system – Facade added system – Roof integrated system – Facade integrated system

SOLAR AND BUILDING ENERGY CONCEPT

Solar and building energy efficiency – No special energy target – Standard energy target – (state of art,        normative) – High energy efficiency – (Passive-house, n-ZEB, PEB)
New building or refurbishment – New building – Refurbishment (ordinary building)

SOLAR AND URBAN CONTEXT

Solar and urban density – Low-density building – Medium-density urban context – High-density urban context

Photo

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General view. Credits: Adriano Biondo
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Interior view. Credits: Adriano Biondo
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Facade. Credits: Adriano Biondo
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PV modules on roof. Credits: Adriano Biondo
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