Växjö: the greenest city in Europe

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1 Växjö: the greenest city in Europe on sustainable urban planning in Sweden Kaj Granath, architect, PhD Department of Civil Engineering

2 Background statistics Sweden: counties 290 municipalities Växjö municipality: inhabitants (December 2008) in the city

3 Swedish Cities ranked by size, top 50 1 Stockholm Göteborg Malmö Uppsala Linköping Västerås Örebro Norrköping Helsingborg Jönköping Umeå Lund Borås Sundsvall Eskilstuna Huddinge Gävle Halmstad Nacka Södertälje Karlstad Växjö Botkyrka Kristianstad Haninge Luleå Kungsbacka Skellefteå Solna Järfälla Karlskrona Täby Sollentuna Kalmar Mölndal Östersund Gotland Varberg Norrtälje Örnsköldsvik Falun Trollhättan Uddevalla Nyköping Skövde Hässleholm Borlänge Lidingö Tyresö Motala Total: inhabitants in the 50 largest cities (58 % of the Swedish population)

4 Swedish energy production 2007 (just a little bit simplified)

5 Turning a problem into a resource Växjö city park: a green (and blue) environment in the city centre Revised system for surface water treatment in a canal, leading to open detention basins bacino di contenimento, and fresh water pumped from a lake nearby

6 City of Växjö Healthy lakes Parks and natural reserves

7 Lake Trummen, before restauration and after!

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9 Open compensation basin Linnékanalen Before After Dry season Rainy season

10 Bäckaslövs biological surface water treatment plant Sedimentation in wetland Outlet Wetlandca 5 ha Sedimentation dam ca 2 ha ca 9000 m3 Regulation 2x200 l/s Inlet 2xΕ1400 Service area: 190 ha industry, office, retail, 130 ha housing

11 1980 biofuel was introduced in the district heating system. 20 years later it had a share of 90 % the energy supply decision to make Växjö a fossil free city, and the combined power and heating plant abandoned oil Local energy production cooperation with the Swedish Society for Nature Preservation

12 Goals to achieve Reduce emission of CO2 per capita with at least 50 % in 2010 and with at least 70 % in 2025 compaired to 1993 levels Reduce consumption of electricity per capita with at least 20 % in 2015 compaired to 1993 levels Increase bicycle transport with at least 20 % in 2015 compaired to 2004 levels Increase use of public transport in the city with at least 20 % and regional public transport with 12 % in 2015 compaired to 2002 levels

13 Source: Energy Information Administration 2006 Fossile CO2 emissions ton/capita 2006

14 Fossile CO2 emissions in Växjö (kg/capita) : 3,2 tons 32% Goal 2010 Goal Totalt Transports Heating Electricity Goal 2010 Goal 2025

15 Share of renewables in Växjö % 91 % 62 % 4 % Renewable Not renewable In Sweden, the share of renewables has climbed from 34 % in 1990 to 44 % in 2007

16 Heating and cooling Biofuelled heating and power in Växjö city Biofuelled local heating in Lammhult, Braås, Rottne and Ingelstad Pellet burner for heating at Växjö airport Solar panels at Växjö municipal swimming pool Municipal funding for citizens converting to biofuel or solar energy systems Expanding district heating Substituting electrical heating for district heating District cooling at the university and the city hospital

17 Solar energy sustainable development as a learning object solar panel system with 532 solar cells kwh/year (1/8 of total consumption) used in teaching (mathematics, physics, english)

18 Stadsutveckling Östra Lugnet Hagavik Hovshaga Centrum Arenastaden Bäckaslöv Jonsboda/ Bredvik Biskopshagen Hollstorp/F ylleryd Södra Stationsområdet/W TC Välle Broar Vikaholm S Teleborg & Telestad

19 Välle Broar

20 Välle Broar

21 Välle Broar: High rise housing in wood 134 houing units in 4 buildings The largest wooden housing project in Sweden

22 Passive housing in wood, Portvakten Södra (rental housing) 96 units in 2 buildings 8 stories, wooden construction No heating system Energy consumption 50% below regulation District heating teleriscaldamento for extreme weather and hot water Energy efficient windows, extreme insulation, heat recovery from sewage system, individual energy consumption metering unit by unit Building started april 2008 Ready juni 2009

23 Transports achieved and planned Municipal car pool with green cars Expanded net of bicycle routes: 42 km within the city eco driving Free parking for green cars Mapping of travel behaviour Biogas production at the sewage treatment plant

24 From biological waste to biogas power Biological waste (food, sludge, fat) Biogas production for electricity, heating and transport, MWh/år Sewage treatment plant self sufficient for heating, producing 60 % of its own electricity 50 biogas cars

25 Key factors for a succesful environmental program Political will power, unity and ability to reach decisions Cooperation and networking on different levels Resources national and EU funding Bo Frank (m), Charlotta Svanberg (s), Gunnar Elm (c) Kommunalråd i Växjö kommun

26 Economic growth (GDP) and CO2 emissions, change in %

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