Hannover-Kronsberg a housing-area with very far going aspects of sustainability
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- Slide 1
- Hannover-Kronsberg a housing-area with very far going aspects
of sustainability
- Slide 2
- The presentation: 1.The Kronsberg-Housing-Area an overview
2.Far going aspects of a sustainable development: Waste Energy
Rainwater The presentation: 1.The Kronsberg-Housing-Area an
overview 2.Far going aspects of a sustainable development: Waste
Energy Rainwater
- Slide 3
- 9 km from the city centre 1995 Start of development planning
1997 Construction starts on residential buildings (around 30
different developers) 2000 Completion of approx. 3,000 homes
Reserve land to the north and south for further 3,000 homes
Excellent transport connections to the city centre The Kronsberg
Settlement
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- Approx. 80% of building land owned by the City Overall concept
enforced through clauses in land sale contracts and planning
permission contract Kronsberg Settlement
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- Approx. 50% subsidised housing 2,700 units in 3 5-storey
apartment houses 300 2-storey private terraced houses
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- Waste
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- Dramatic reductions in waste quantities (1989 - 2002) Waste
avoidance (- 380,000 t) Dumping of soil, building rubble, sewage
sludge (- 340,000 t) Recycling, composting of organic waste (+
72,000 t) Recycling of glass, paper, packaging and scrap metal (+
41,700 t) Decrease in waste-to-disposal from c. 1,000,000 to
200,000 tonnes p.a.!
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- Great potential for commercial waste reduction
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- Household Waste Pre-sorting Result at Kronsberg: Approx. 30%
reduction in waste volumes (City: 219 kg per household p.a.,
Kronsberg: 154 kg per household p.a.)
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- Construction Waste Preventive waste management planning on
building sites Result at Kronsberg: 86% pre-sorting of waste and
recyclables
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- Soil Management Result at Kronsberg: 700,000 m 3 excavated soil
re-used, making about 100,000 lorry journeys unnecessary and thus
saving 1,200 tonnes of CO 2 emissions
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- organics commercial waste construction waste bulky waste
household waste sewage sludge street sweepings City of Hannover
Waste Treatment Concept ca. 100,000 t/a waste to energy since 2005
ca. 100,000 t/a biological treatment since 2006 landfill ca. 70,000
t/a ca. 25,000 ca. 5,000 ca. 35,000 compost ca. 35,000 t/a ca.
5,000 ca. 3,000 ca. 215,000 t/a mechanical residual waste treatment
ca. 100,000 ca. 70,000 ca. 100,000 ca. 15,000 ca. 69,000 t/a ca.
1,000 t/a ca. 51,000 t/aca. 38,000 t/aca. 90,000t /aca. 15,000
t/aca. 16,000 t/a slag ca. 25,000 t/a recyclables ca. 20,000 t/a
ca. 70,000 t/a composted hazardous waste landfill ca. 3,000
t/a
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- Treatment Concept for Residual Waste 2/3 incineration 1/3
biological treatment (fermentation) Use of landfill gas at the
central dump and methane from a waste fermentation plant (approx.
15,000 MWh/a)
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- Energy
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- Hannover - Climate Protection Region Since 1994: municipal
climate protection programme, with a specialist unit in the city
administration Since 2000: climate fund run by the municipal energy
utility and the city council - 5 million funding programme each
year Since 2001: regional climate protection agency
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- Successes with Renewable Energy Within the city area: 466
registered solar thermal units, total area 4,500m 209 solar
electricity units, total 1,600 KWpel capacity Exploitation of the
hydro-electric potential of Hannovers river (1.38 MW rating) In the
Hannover Region: Approx. 225 large wind turbines, which can meet
the electricity needs of around 170,000 homes About 1,000 buildings
a year retrofitted for energy efficiency
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- CO 2 Reduction at Kronsberg CO 2 reduction: 60%! With the
windmills 80% CO 2 emissions in % low energy house standard +
cogeneration heating power plant (about - 20%) + electricity saving
(-10%) + two wind turbine generators each 1.5 MW (-20%) (about
-30%)
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- Walls: 15 - 20 cm Roofs: 18 - 25 cm Heating energy demand:
Average 56 kWh/m 2 and year Optimised Insulation
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- Only 5% more expensive than new-build developments with
district heating connections elsewhere in the city Decentral
cogeneration heating plant Compulsary connection to the network
District Heating
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- Wind Energy Two MW-class wind turbine generators in the
countryside meeting the electricity needs of 3,000 homes
Successful, and no protests from local citizens!
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- The Next Step: Passive Houses Domestic electricity Ventilation
electricity Hot water Heating from... To End energy index kWh/ (ma)
over 90% reduction compared to old housing stock
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- Energy consumption just 15 kWh/m 2 p.a. Target met! Residents
very satisfied 1998: pilot project of 32 Passive Houses at
Kronsberg
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- What makes a Passive House? Maximum insulation (40-45 cm in
walls, 30 40 cm in the roof) Triple glazed reflective coating
windows filled with inert gas Comfortable ventilation system with
heat recovery Max. supplementary heating demand: 15 kWh / m a
Optimised solar gain Blower door test
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- In der Rehre planned development of 300 detached Passive
Houses
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- Following completion of the new-build Kronsberg settlement, a
major new pilot project: Concerto Integrated EU project Energy
saving in the building stock and use of renewable energies
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- Concerto Aims 60-70% savings on end energy for heating Use of
renewable energies wherever possible. Measures Energy efficient
retrofitting of multi-occupancy houses owned by several Hannover
housing associations (dating from 1950-1970) to a high energy
efficiency standard Use of renewable energy by conversion from coal
to biomass for the existing district heating network. Aims 60-70%
savings on end energy for heating Use of renewable energies
wherever possible. Measures Energy efficient retrofitting of
multi-occupancy houses owned by several Hannover housing
associations (dating from 1950-1970) to a high energy efficiency
standard Use of renewable energy by conversion from coal to biomass
for the existing district heating network.
- Slide 27
- Modernisation in 2004 Rented apartment house to Passive House
Standard: Auf dem Hollen, Hannover
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- Rainwater Management
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- Worldwide, major flooding problems from increasing sealing of
infiltration areas by development Factor 10 approach: Where
possible, total retention and infiltration within the development
area
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- Rainwater Concept at Kronsberg Natural water balance
retained
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- Intelligent Rainwater Management Conventional construction
paved and built-up surfaces Rainwater runs off into the sewers.
Hannover future standard fewer sealed surfaces permeable surfaces
on e.g. car parks groundwater infiltration alternative flood
protection measures
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- (Mulden-Rigolen) Infiltration Trench Systems
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- Flat roofs grassed wherever possible Minimising built-up areas
Remarkable positive commitment by planners
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- Ponds Water as a design element in the inner courts Diverse
planning and landscaping solutions Infiltration and
evaporation
- Slide 35
- Internet: www.hannover.de www.sibart.org (German, English,
French & Spanish) www.hans-moenninghoff.de Thank you!