Hannover-Kronsberga housing-area with very far going aspects of sustainability

The presentation:

The Kronsberg-Housing-Area an overview

Far going aspects of a sustainable development:WasteEnergyRainwater

9 km from the city centre1995 Start of development planning1997 Construction starts on residential buildings (around 30 different developers)2000 Completion of approx. 3,000 homesReserve land to the north and south for further 3,000 homesExcellent transport connections to the city centre The Kronsberg Settlement

Approx. 80% of building land owned by the CityOverall concept enforced through clauses in land sale contracts and planning permission contract

Kronsberg Settlement

Kronsberg Settlement Approx. 50% subsidised housing 2,700 units in 3 5-storey apartment houses 300 2-storey private terraced houses

Waste

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.!

Diagramm1 (2)

6988633065712200247176

216296723516662927200

&L&8I:\I-23\in\allg\&F &A&R&8 17.03.03

Avoidance

Recycling

Disposal

Entsorgung

Verwertung Papier/Glas/LVP/Schrott/E-Schrott

Verwertung organischer Abflle

Verwertung (Klrschlamm, Boden u.Bauschutt)

Menge [t]

Tabelle1

Mengenentwicklung fr die Landeshauptstadt Hannover 1989 - 2000

Abfall-/WertstoffmengenAbfallvermeidungVerwertungDeponie

aus LHHgegenber 1989 bzw. 1995

[t][t][t][t]

958,239angeliefert30,657Papier/Glas/LVP/Schrott

198930,657Papier/Glas/LVP/Schrott12,200Kompost698,863

988,896eingesammelt247,176

290,033

621,330angeliefert54,616Papier/Glas/LVP/Schrott/E-Schrott

199554,616Papier/Glas/LVP/Schrott/E-Schrott336,90934,815Kompost368,799

675,946eingesammelt202,829Klrschlamm, Boden, Bauschutt

292,260

315,812angeliefert72,351Papier/Glas/LVP/Schrott/E-Schrott

200272,351Papier/Glas/LVP/Schrott/E-Schrott305,51866,629Kompost216,296***)

388,163eingesammelt27,200(nur LHH-Mengen !)

166,180

**) Im Vergleich zu 1995 ist die Einwohnerzahl im Jahr 2000 (Expo) hher, so da der Trend zur Abfallvermeidung in der Grafik annhernd stagniert.

***) ohne Verbrennung

198920022000

Entsorgung698,863216,296216,296

Verwertung Papier/Glas/LVP/Schrott/E-Schrott30,65772,35172,351

Verwertung organischer Abflle12,20066,62966,629

Verwertung (Klrschlamm, Boden u.Bauschutt)247,17627,20027,200

988,896382,476382,476

&R&6&F

Great potential for commercial waste reduction

Disposal

1989

2002

soil

110,000 t

2,000 t

sewage sludge

60,000 t

0

rubble

73,000 t

20,500 t

construction waste

125,000 t

5,500 t

Household Waste

Pre-sortingResult at Kronsberg:Approx. 30% reduction in waste volumes(City: 219 kg per household p.a., Kronsberg: 154 kg per household p.a.)

Construction WastePreventive waste management planning on building sitesResult at Kronsberg:86% pre-sorting of waste and recyclables

Soil ManagementResult at Kronsberg:700,000 m3 excavated soil re-used, making about 100,000 lorry journeys unnecessary and thus saving 1,200 tonnes of CO2 emissions

organicscommercial wasteconstruction wastebulky wastehousehold wastesewage sludgestreet sweepingsCity of Hannover Waste Treatment Conceptca. 100,000 t/awaste to energy since 2005landfill ca. 70,000 t/aca. 25,000 ca. 5,000ca. 35,000ca. 5,000ca. 3,000ca. 215,000 t/amechanical residual waste treatmentca. 100,000ca. 70,000ca. 100,000ca. 15,000ca. 69,000 t/aca. 1,000 t/aca. 51,000 t/aca. 38,000 t/aca. 90,000t /aca. 15,000 t/a ca. 16,000 t/aca. 70,000 t/a composted

Treatment Concept for Residual Waste2/3 incineration1/3 biological treatment (fermentation)Use of landfill gas at the central dump and methane from a waste fermentation plant (approx. 15,000 MWh/a)

Energy

Hannover - Climate Protection RegionSince 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

Successes with Renewable EnergyWithin the city area:466 registered solar thermal units, total area 4,500m209 solar electricity units, total 1,600 KWpel capacityExploitation 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 homesAbout 1,000 buildings a year retrofitted for energy efficiency

CO2 Reduction at Kronsberg

Walls: 15 - 20 cm Roofs: 18 - 25 cmHeating energy demand:Average 56 kWh/m2 and year Optimised Insulation

Only 5% more expensive than new-build developments with district heating connections elsewhere in the cityDecentral cogeneration heating plant

Compulsary connection to the networkDistrict Heating

Wind EnergyTwo MW-class wind turbine generators in the countrysidemeeting the electricity needs of 3,000 homesSuccessful, and no protests from local citizens!

The Next Step: Passive HousesDomestic electricityVentilation electricityHot waterHeating from ... To

End energy index kWh/ (ma)over 90% reduction compared to old housing stock

Tab_Vgl

EndenergiekWh/(ma)BESTANDWSchVO1984WSchVO1995EnEV 2002Passivhaus

Heizung von ... bis182.512380.5486.5

...bis257.5177119.510219.1

Warmwasser3030302710.8

Lfterstrom00002.9

Haushaltsstrom31.831.831.830.820

Mittelwert Heizung220.0150.0100.075.012.8

Im angegebenen Intervall fr Heizenergie liegen 70% aller Mewerte (Intervall +-sigma).

Bezugsflche ist einheitlich die Wohnflche nach 2. BV, nicht die Flche AN nach EnEV. Verwendet man AN, so werden alle Werte um etwa 25% kleiner.

Grundlage fr die Werte fr den Heizenergieverbrauch sind nicht Berechnungen, sondern Auswertungen von Messergebnissen.

Grundlage fr die Werte fr das Passivhaus sind die Messergebnisse der Passivhaussiedlung Hannover Kronsberg, 3.Jahr.

Aufgestellt: Dr. W. Feist September 2003

DiagrammkWh/(ma)BESTANDWSchVO1984WSchVO1995EnEV 2002Passivhaus

Heizung von ... bis182.512380.5486.5

...Differenz7554395412.6

Warmwasser3030302710.8

Lfterstrom00002.9

Haushaltsstrom31.831.831.830.820

&A

Seite &P

Folie_Farb

31.8300182.575

31.830012354

31.830080.539

30.82704854

2010.82.96.512.6

BESTAND

WSchVO1984

WSchVO1995

EnEV2002

Passiv-haus

Bezugsflche ist einheitlich die Wohnflche; Grundlage sind Messwerte, nicht Rechenwerte.

Haushaltsstrom

Warmwasser

Lfterstrom

Heizung von ... bis

bl

Endenergiekennwert kWh/(ma)

Folie_Farb (sortiert)

182.57530031.8

1235430031.8

80.53930031.8

485427030.8

6.512.610.82.920

Stock

according to new build regulations 1984

1995

2002

PassiveHouse

Related to living space; based on metering, not calculated predictions

Heizung von ... bis

bl

Warmwasser

Lfterstrom

Haushaltsstrom

Endenergiekennwert kWh/(ma)

Energy consumption just 15 kWh/m2 p.a.Target met! Residents very satisfied1998: pilot project of 32 Passive Housesat Kronsberg

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 recoveryMax. supplementary heating demand: 15 kWh / m aOptimised solar gainBlower door test

In der Rehre planned development of 300 detached Passive Houses

Following completion of the new-build Kronsberg settlement, a major new pilot project: ConcertoIntegrated EU project Energy saving in the building stock and use of renewable energies

ConcertoAims60-70% savings on end energy for heatingUse of renewable energies wherever possible.MeasuresEnergy 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.

Modernisation in 2004Rented apartment house to Passive House Standard:Auf dem Hollen, Hannover

Rainwater Management

Worldwide, major flooding problems from increasing sealing of infiltration areas by developmentFactor 10 approach:Where possible, total retention and infiltration within the development area

Rainwater Conceptat KronsbergNatural water balance retained

Eigenbetrieb der Landeshauptstadt

rainwater management

Eigenbetrieb der Landeshauptstadt

rainwater management

Eigenbetrieb der Landeshauptstadt

rainwater management

Intelligent Rainwater ManagementConventional constructionpaved and built-up surfacesRainwater runs off into the sewers.Hannover future standardfewer sealed surfacespermeable surfaces on e.g. car parksgroundwater infiltrationalternative flood protection measures

(Mulden-Rigolen)Infiltration Trench Systems

Flat roofs grassed wherever possible Minimising built-up areas Remarkable positive commitment by planners

PondsWater as a design element in the inner courts Diverse planning and landscaping solutions Infiltration and evaporation

Internet: www.hannover.dewww.sibart.org (German, English, French & Spanish)www.hans-moenninghoff.deThank you!

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