Sustainable City of Zurich On the Way to the 2000-Watt Society LCM - - PowerPoint PPT Presentation

Sustainable City of Zurich On the Way to the 2000-Watt Society

LCM 2007 - From Analysis to Implementation Zurich, August 27 - 29, 2007

• Dr. Annick Lalive d'Epinay

Sustainable Construction, City of Zurich www.stadt-zuerich.ch/nachhaltiges-bauen

Stadt Zürich Amt für Hochbauten LCM 2007 - From Analysis to Implementation August 27 - 29, 2007 Page 2

Building Department of Zurich "Amt für Hochbauten"

110 motivated employees are our greatest asset 4000 city-owned buildings with 8 billion US $ insured value are our sphere of activity 20 Mio. US $ we provide in services 330 Mio. US $ are our turnover

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– 4000+1200 buildings are owned by the municipal City of Zurich. – 80% of the buildings were erected before 1980. – 400 million Swiss francs are invested annually by the City of Zurich.

Introduction

All new city-owned buildings are constructed to meet the 7 mile steps for energy and resource efficiency.

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7 Mile Steps to Energy and Resource Efficient Building

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School Building "Kügeliloo", Extension 2004

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MINERGIE Standard for New Building Constructions

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MINERGIE Standard for Refurbishment (>25% Energy Reference Area)

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Housing Development "Heumatt" 2005

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MINERGIE Standard for Lighting & Efficient Appliances

3

School Building "Apfelbaum"

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The Letzigrund stadium will be the first Zurich owned construction equipped with a wood pellet heating system. The city’s largest solar power system with 250 kW peak power will be on the roof, supplemented by 100m2 solar collectors, providing pre-warming for hot water.

Renewable Energy (>25% in New Constr) Pilot & Demonstration Projects

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New "Letzigrund" Stadium

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Increased Requirements in Building Ecology & Indoor Environmental Quality

5

91% Concrete with reused + recycled aggregate 45% Concrete aggregate in walls and ceilings 46% Aggregate from refuse dump excavated on site and processed in special soil washing plant to waterproof / prestressed concrete

School Building "im Birch"

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Environmental Sustainability as Decision-

Making Criteria in Architectural Competitions

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Stadt Zürich Amt für Hochbauten LCM 2007 - From Analysis to Implementation August 27 - 29, 2007 Page 11

School Building

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

materials

• perating energy

soil/landscape location/infrastructure building status

• perating costs

value well being utilisation design community

7

Sustainable Facility Management

Improvement due to refurbishment

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Result: 19 Architectural Competitions Amt für Hochbauten 1998 –2006

2000 apartments 1998 2006 Minergie Index [kWh/m2] 70 60 50 40 30 20 10 MINERGIE

Energy Index of different housing developments, 1998 - 2006

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City Council Program Sustainable City of Zurich – on the Way to the 2000-Watt-Society

– The 2000-Watt-society is a vision: everybody in the world will be able to use the same amount of energy – High quality of life and high living standard for today‘s and future generations – A policy for the environment to reduce energy consumption and global warming in a long-term perspective (at least to 2050)

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The Vision of the 2000-Watt-Society

Development in energy requirements per person

Watts per person Total Energy requirements Fossil energy

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Legislature Goal Sustainable Zurich City – on the Way to the 2000-Watt-Society

Crossroads for the 2000-watt-society Lighthouse project for 2000 Watt society Reduction: Energy to 2000 W/person CO2eq to 1 t/person

Development in energy requirements per person

Watts per person Total Energy requirements Fossil energy

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Buildings for the 2000-Watt-Society

In the four aspects: Energy, Building Materials, Electricity and Mobility, increased efficiency must be achieved in building concepts. The MINERGIE standard is not good enough!

Energy Materials Electricity Mobility

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Experiences and Examples

Energy, Minergie-P for new buildings Material 100 MJ/m2a embodied energy (SIA energy-efficiency-path) Energy & Material Efficiency is already predetermined in the competition project Electricity Very good products are not always available. There is a need for innovation. Mobility This issue is rarely addressed but has a big impact.

Old peoples home "Trotte" New patients building of the city hospital "Triemli" Housing Development "Sihlbogen" Office Building "Werd" Housing Development "Werdwies"

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Energy and Material Efficiency: Predetermined in the Architectural Competition!

Architects and Planners should be able to actively improve their architectural projects during an architectural competition. We need a better understanding of the main factors which influence the energy consumption in a building.

Competition-Calculation (WW-Kalkulation), using the same input data for estimates of

• costs
• embodied energy
• operating energy

Energy Materials 1 5

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Competition Calculation "WW-Kalkulation" Method

Energy Materials 1 5

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Competition Calculation "WW-Kalkulation" Method

Energy Materials 1 5

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Competition Calculation "WW-Kalkulation" Results

Energy Materials 1 5

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The project will meet the MINERGIE-P-ECO standard. The amount of embodied energy is actively reduced and calculated several times during the planning process.

Old Peoples Home "Trotte"

compactness: best volume/ surface-ratio well positioned windows for

• ptimised solar

gains favourable construction and material choices 2nd place Edelmann Krell 3rd place Harder & Spreyermann

Enzmann + Fischer AG

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New Patients Building of City Hospital "Triemli"

The project will meet the MINERGIE-P standard Renewable energy sources (geothermic or wood) will be

• used. The CO2 reduction

amounts to 80%. It will be completed in 2013.

compactness: best volume/ surface-ratio most flexible room

• rganisation

favourable technical installation concept with system separation

Atelier WW + KSP Engel und Zimmermann GmbH Weber + Hofer AG

APH Architekten AG

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Electricity There is a Need for Innovation!

Electricity 4

Housing Development "Werdwies" Only energy efficient A class household appliances are purchased for municipally owned properties. E.g.: Heat pump tumblers in a social housing development

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Electricity There is a Need for Innovation!

Electricity 4

Office Building "VZ Werd" A competition was launched to develop a highly energy efficient floor lamp for office buildings. www.topten.ch

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Mobility

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Housing Development "Sihlbogen" Building Cooperative Zurlinden In the housing development "Sihlbogen" there are fewer cars than people. This meant that the number of parking spaces could be reduced Instead of cross-subsidising by simply reducing the monthly rent, the tenants receive an annual ticket for all public transport facilties in and around Zurich. The railway station is located inside the settlement.

Mobility Completely New Concepts Are Necessary

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Thank you for your attention