Solutions for Cities in a Decarbonized World - Viennas Green Buildings

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1 MA 20 Bonn, Solutions for Cities in a Decarbonized World - Viennas Green Buildings Bernd Vogl, Vienna City Administration Head of Department

2 Vienna, some facts and pictures >1.8 million inhabitants growing ~ 1% per year 415 km² - almost 50% green aeras

3 /Fürthner 2% of the earth s surface is occupied by cities 53% 3 of the world s population lives in cities 75% of CO 2 emissions are produced by cities climate targets cities

4 Foto: Steven Duchon Framework Strategy 4 Key goal for 2050 of Smart City Wien: Highest possible resource preservation together with optimum quality of life for all citizens. This can be achieved through comprehensive innovations.

5 PARIS FOR CITIES IN A NUTSHELL Cycling, public transport, car sharing Electric mobility Super efficient houses Refurbishment of existing buildings Renewables and waste heat for heating cities Electricity from renewables imported (could also be converted into methan/hydrogen ) 5

6 DECARBONIZATION MORE ELECTRICITY WIND & PHOTOVOLTAICS 6 ELECTRICITY DEMAND OF CITIES COMMUNICATES WITH PRODUCTION STORAGE

7 7 Future Buildings = decarbonizing buildings and heating Vienna/Austria in a leading position WHY? 5 Missions we are working on

8 MISSION 1 REGULATION Comprehensive building codes and combined subsidies for efficiency, renewables and waste heat more than 20 years Obligation for non-residental buildings: use of renewables on site : 1 kw/100 m² 0,7 can be done by better efficieny Heating systems allowed: district heating : heat pumps : renewables : chp : gas with solar work with planners!!

9 MISSION 2 : NO COAL AND OIL STARTING DISCUSSIONS ON NATURAL GAS 100% 90% 15% 19% 22% 9 80% 70% 60% 50% 40% 30% 20% 10% 0% 50% 52% 48% 32% 33% 36% 38% 41% D i s t r i c t H e a t i n g N a t u r a l G a s 52% 51% 51% 51% 48% 10% 11% 10% 17% 10% 12% 6% 8% 7% 7% 6% 7% 6% 4% 3% 3% solar, heat pumps Solar, Wärmepumpen Biomasse biomass Fernwärme district heating Erdgas natural gas Elektr. electricity Strom Heizöl oil coal Kohle unknown unbekannt

10 MISSON 3 : REDUCE Since 2000: Renovation (incl. improvement of energy performance) of buildings with flats. 10 Minus t CO 2 = 20 % of total CO 2 emissions of the building sector.

11 MISSION 4 1. shift district heating systems to renewabels and waste heat buildings are part of the new energy system 3. power to gas producing hydrogen or methane for the gas system

12 MISSION ENERGIERAUMPLANUNG 5 Urban Development Plan New Topic: Smart (starting with) 12 Energy concepts for large new city developments Energy criteria for larger projects Modelling of energy demand Renewable energy and waste heat sources

13 FUTURE BUILDINGS - THESIS 1» use your brain and make intelligent investments to heat less. «13

14 FUTURE BUILDINGS - THESIS 2» electric heat pumps make buildings an important part of the energy transition «14

15 FUTURE BUILDINGS - THESIS 3» Low-temperature heating networks as solution for urban areas and fluctuating power generation «15

16 FUTURE BUILDINGS - THESIS 4» PV electricity and wind power generation becomes an important basis for planning the energy system of a building «16

17 FUTURE BUILDINGS - THESIS 5» The soil beneath the city and the concrete parts of the buildings are the new energy storage - for regeneration - cooling and solar «17

18 APP: ENERGY! AHEAD VIENNA Vienna Energy showcase projects 18

19 TU VIENNA PLUS-ENERGY-OFFICE HIGH-RISE BUILDUNG 19 General refurbishment First plus-energy-office high-rise buildung Generates more energy than it needs (technical building equipment, office equipment, kitchens and lighting considered!)

20 TU VIENNA PLUS-ENERGY-OFFICE HIGH-RISE BUILDUNG primary energy demand [kwh/m²a] 20

21 Thanks for your attention! see you in Vienna!

22 EARLY DAYS HOUSE KAISERSTRAßE GENERAL REFURBISHMENT & EXTENSION OF A LISTED BUILDUNG 22 Source:

23 EARLY DAYS HOUSE KAISERSTRAßE GENERAL REFURBISHMENT & EXTENSION OF A LISTED BUILDUNG 23 Heating demand before: 121 kwh/m²a Heating demand after: kwh/m²a Annual energy consumption reduced by 80 % Inside insulation, inside lying passive-house windows

24 ÖJAB-GREENHOUSE STUDENT HOSTEL IN ASPERN 24 Passive House Plus standard Building produces all needed energy itself PV > 200 kwp & 137 kwh battery-storage high thermal insulation, airtight building with controlled ventilation, etc.

25 PASSIVE HOUSE EBERLGASSE FIRST REFURBISHMENT OF AN EARLY DAYS BUILDING TO PH-STANDARD 25 General refurbishment Change of heating system from gas to RES Subsequent installation of a ground water heat pump Ventilation with heat recovery, in- & outdoor LED lighting, energy recovery from elevator

26 ASPERN - D12 SUBSIDISED HOUSING ANALYSING DIFFERENT ENERGY SUPPLY SYSTEMS 26 general renovation heating demand: 3,4 kwh/m²a 213 flats (low Cooling energy demand: building) 2,5 kwh/m²a 7 different heat pump systems (800 kw) Solar heat (90 kw) + Hybrid (60 kwp.th + 20 kwp.el) + PV (15 kwp) Soil storage (40 MWh) Battery-storage (20 kwh) Smart home automation

27 ASPERN - D12 SUBSIDISED HOUSING ANALYSING DIFFERENT ENERGY SUPPLY SYSTEMS 27 general renovation heating demand: Cooling demand: Very close to public transport Planted common areas Construction costs ~ /m² Monthly rent ~ 7 /m² Each appartment has free space 3,4 kwh/m²a 2,5 kwh/m²a

28 KALLCO Q11 AFFORDABLE HOUSING IN 11. DISTRICT 28 general renovation heating demand: 3,4 kwh/m²a 325 flats (low energy building) Cooling demand: 2,5 kwh/m²a Monthly rent including heating ~ 12 /m² Surface heating systems Geothermal energy for heating and cooling Partly regeneration of soil by cooling the flats District heating for peak loads and remaining regeneration of soil Source:

29 house without heating no heating system no cooling no ventilation facility heating by people (80 watts) devices (computers, copy machines, etc.). 29 bricks (mass!) 76 cm (30 inches) high rooms (night time) ventilation window sensors solar shading: deep window reveals aera: m² architects: Baumschlager Eberle 2226 office building Lustenau, Austria >> 2226

30 AUSTRIAN STATE PRICE ARCHITECTURE AND SUSTAINABILITY (2010, 2012 GERMAN, BUT PDFS IN ENGLISH) 2010: : : : coming soon 30 KLIMAAKTIV THE AUSTRIAN PATH TO SUSTAINABLE BUILDING booklet lighthouse projects: video Austrians building competence: