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December 2rd 2014 | Photovoltaics conference
Chambre de Commerce et d'Industrie de Lyon
Jürgen K. Heller (Dipl. Ing.)
Project coordinator
Consortium Smart Green Tower
From solar energy pioneers to ‚eco-city‘
to ‚Green City Freiburg‘
Hindsight
Hindsight
Prospect
1980s:
Anti-nuclear movement
2000s:
Solar energy as
An economic factor
From 2014 on:
Smart Green
City Freiburg
1990s:
Pioneers in solar energy
2010:
‚eco-city‘
Green City Freiburg
Climate protection, use of renewable
resources, create new energy models
Implemented concepts of sustainable
urban development
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The Smart Green Tower
Yesterday – Today – Tomorrow
1.
Starting Point
2.
Profile
3.
From
briefing
Charactericts
Smart Green
District:
Technology
to
substantiation
Partner
The Vision
various Smart
Green Buildings
communicate
4. Modules of
the pilot project
5.
Concerns
Mile stones
Sponsorship
Scientific monitoring,
analysis and
optimisation
Political expression
of intention
Funding
Technology transfer
1. Starting Point
‚Smart-Grid-Circle‘ Freiburg (Expert Group)
History
-  Formed under the aegis of
Siemens Freiburg with
Fraunhofer ISE
-  consisting of experts from
science and economy
-  New vision of the pilot
project „Smart Green
Tower“
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2. Profile
Smart Green Tower Freiburg
Profile
Energy concept
Partner
Tower:
-  39,5 to 48 meters
Power production:
approx. 400 Kilowatt peak
FWTM Freiburg
- 
Power storage:
-  0.5 MWh lithium-ion
batteries
-  integration of a lithiumion storage in the
building as link between
decentralised renewable
generation systems
with so-called ‚Solar Hut‘ up to
44-51 meters
- 
17 floors with a skygarden
- 
Garage (260 parking spaces)
GFA :
about 16.000 sq m
Building costs:
approx. 48 million €
Building application:
January 2015
Coupling of the building
management system with:
-  PV systems
-  batteries and selected
consumer groups over a
DC-intermediate circuit
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Investor & Architect:
Wolfgang Frey
Project supervisor:
Dipl. Ing. Jürgen Heller
Technology:
Siemens AG
ads-tec
Scientific monitoring:
Fraunhofer ISE
Energy supply:
Badenova
t
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3.1 The Vision – with ‘Smart buildings’
via intelligent power transmission to ‘Smart Green Cities’
Smart Building
Smart building
as part of
Smart Grids …
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Smart Green Cities
… form the essential
part for a Smart
Green City.
3.2 The Vision –
Smart cities need smart buildings
Green and Sustainable Building
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Smart Building
Sustainable buildings:
Sustainable working buildings:
-  Efficient use of resources
-  actively participating the power grid
-  apply renewable resources and
equipment wherever possible
-  adjust energy consumption and
fluctuating energy supply dynamically
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4. Modules of the pilot project
Smart Energy District beginning with the Green City Tower
Smart
Green
Tower
Photovoltaics
Smart Green Tower
> 500 kW
Self generator electricity (AC)
Self generator electricity
(+ line current on demand)
Entry Direct-Connect (DC)
Supply from Direct-Connect (DC)
Line current
+
DC –indirect inverter
EnergyManagement
-System
(Own
consumption)
Self generator electricity
(+ line current on demand)
Existing
Photovoltaics
Photovoltaics
New
Exhibition
New Construction
1 MW
construction‘
hall
FWTM + Hotel
150 kW
Battery
(District
storage)
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5. Our concerns
Supported by…
-  Franz Untersteller,
Secretary of State for
Environment of BadenWürttemberg
-  Dr. Dieter Salomon,
mayor of Freiburg
Political expression
of intention…
... towards the project
from the point of view of
Department of the
Environment
Funding…
...of the scientific
research and
development