Hannover-Kronsberg a housing-area with very far going aspects of sustainability
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Transcript of Hannover-Kronsberg a housing-area with very far going aspects of sustainability
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Hannover-Kronsberga housing-area with very far going aspects of sustainability
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The presentation:
The Kronsberg-Housing-Area an overview
Far going aspects of a sustainable development:WasteEnergyRainwater
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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
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Approx. 80% of building land owned by the CityOverall concept enforced through clauses in land sale contracts and planning permission contract
Kronsberg Settlement
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Kronsberg Settlement 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.!
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
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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
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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.)
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Construction WastePreventive waste management planning on building sitesResult at Kronsberg:86% pre-sorting of waste and recyclables
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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
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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
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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)
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Energy
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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
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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
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CO2 Reduction at Kronsberg
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Walls: 15 - 20 cm Roofs: 18 - 25 cmHeating energy demand:Average 56 kWh/m2 and year Optimised Insulation
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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
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Wind EnergyTwo MW-class wind turbine generators in the countrysidemeeting the electricity needs of 3,000 homesSuccessful, and no protests from local citizens!
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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)
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Energy consumption just 15 kWh/m2 p.a.Target met! Residents very satisfied1998: pilot project of 32 Passive Housesat 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 recoveryMax. supplementary heating demand: 15 kWh / m aOptimised solar gainBlower 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: ConcertoIntegrated EU project Energy saving in the building stock and use of renewable energies
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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.
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Modernisation in 2004Rented 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 developmentFactor 10 approach:Where possible, total retention and infiltration within the development area
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Rainwater Conceptat KronsbergNatural water balance retained
Eigenbetrieb der Landeshauptstadt
rainwater management
Eigenbetrieb der Landeshauptstadt
rainwater management
Eigenbetrieb der Landeshauptstadt
rainwater management
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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
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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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PondsWater as a design element in the inner courts Diverse planning and landscaping solutions Infiltration and evaporation
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Internet: www.hannover.dewww.sibart.org (German, English, French & Spanish)www.hans-moenninghoff.deThank you!
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