ENERGY EFFICIENCY OPPORTUNITIES IN URBAN REHABILITATION. Maria João Samúdio Agência de Energia do Porto

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1 ENERGY EFFICIENCY OPPORTUNITIES IN URBAN REHABILITATION Maria João Samúdio Agência de Energia do Porto ENERGY FOR FUTURE CITIES Porto

2 AdEPorto Porto Municipality submitted a joint application to the IEE to create 5 energy agencies (Bordeaux, Latina, Murcia, Porto and Riga) AdEPorto was created by 20 institutions more joined in 2008 and more (7 Municipalities! Gondomar, Maia, Matosinhos, Póvoa de Varzim, Trofa, Santo Tirso e Vila do Conde) in 2010

3 AdEPorto 8 Municipalities 5 I&D 20 Stakeholders 1 Mio inhabitants 300 km 2

4 Energy in Porto (1) Energy Matrix The diagnostic of the energy fluxes. The Porto s energy profile (2) Porto s Strategy for Sustainability (3) Porto and The Covenant of Mayors (4) Porto s SEAP Actions and CO 2 impact Strategic measures regarding buildings RUTE Urban heating and cooling network Solar Domestic Hot Water in the Social Housing (5) Agency s new territorial scope

5 PORTO ENERGY MATRIX (edited in 2008)

6 PORTO ENERGY MATRIX Porto Profile: GWh primary energy (2004) Diesel 18% Electricity 52% Gasoline 13% Natural Gas 5% Others 12% Others 9% Transports 33% Buildings 58% Services 55% Residential 45% Source: Porto Energy Matrix, 2008

7 PORTO SUSTAINABILITY STRATEGY GOALS Promoting the environmental values in 3 dimensions: local, regional and global Promoting the social development Promote and establish companies with high development value

8 PORTO SUSTAINABILITY STRATEGY 8 AXIS PLUS Porto Brand Porto as a community with a history, a will and a responsibility Urban rehabilitation Building a urban bridge towards the future Mobility A centrality and a metropolis Environmental resources As they cannot be sustainable, cities owe solidarity to the territory on which they are dependent Education Preparing the next generation Tourism, culture and leisure Welcoming and exchanging Competitive edge Affirming and developing its skills Governance - Citizens and not consumers

9 PORTO & The COVENANT OF MAYORS Decision by the city executive in November 2008 Signature by the Mayor in Brussels, February 2009 SEAP approval by the executive in October 2010 and submission to the Covenant of Mayors CO 2 reduction: 45% (25% local + 21% national) Energy reduction local: 20% Renewable penetration: 35% (6% local + 29% national)

10 URBAN REHABILITATION PRIMARY ENERGY PORTUGAl: GWh of primary energy LISBOA: GWh of primary energy PORTO: GWh of primary energy Transports Industry and Others 31% Buildings 42% Buildings 36% Transports 46% Buildings 5% Transports 28% Other 10% 2% Industry Industry Others Source: DGEG, 2004 Lisbon Energy Matrix, 2005 Porto Energy Matrix, 2004

11 REABILITATION IN PORTO FRAME o Observatory of the Energy-environment Sustainability of Buildings o Guidelines for the Energy Efficient Rehabilitation of the Porto s Historical Centre o SIM-Porto Multicriteria Information System Solar Thermal Systems in Social Housing RUTE Urban Heating And Cooling Network

12 Observatory Promote the energy efficiency from the demand side Observatory of the energy-environment sustainability of buildings in Porto Operational Unit of Porto Municipality and of PortoVivo(downtownrehabilitation society) external to the permitting process and that does not interfere with the national energy buildings certification system (national transposition of EPBD European Energy Performance of Building Directive); Mission: Verify the energy-environment performance of the authorized buildings (new or major rehabilitation) and; Promote the quality of the building stock; 3 phases: Conception (March to August 2008); Experimental start (September to December 2008); Routine and optimization of the operation (2009);

13 OBSERVATORY FOR ENERGY AND ENVIRONMENT SUSTAINABILITY OF PORTO S BUILDING Following online the energy performance of every new/rehabilitated building in Porto Analysing the implementation of EPBD related national regulations at the permitting stage 100% 80% 60% 40% Residential Buildings Heating performance compared to baseline Leading to a new set of Porto Municipal policies/rules to 0% promote and incentive voluntary actions and good practices by developers and designers in the new and rehabilitated buildings 20% Jul 07 Jun 08 Jul 08 Dec 09 Total 0 25 % % % % FACTSHEET Developed for Câmara Municipal do Porto e Porto Vivo, SRU Coordination: AdEPorto Agência de Energia do Porto Technical analysis: Fundação Gomes Teixeira and IC - Instituto da Construção (Universidade do Porto) (edited in 2010)

14 GUIDELINES FOR THE ENERGY EFFICIENT REHABILITATION OF THE PORTO S HISTORICAL CENTRE (WORLD HERITAGE) The rehabilitation of buildings in historical centres, condition of their vitality, faces two challenges: adequacy to the nowadays standards of comfort and habitability while preserving the architectonical and cultural identity and values Available at: FICHA TÉCNICA Document elaborated to Porto Vivo, SRU By: AdEPorto Agência de Energia do Porto and LFC Laboratório de Física das Construções / IC - Instituto da Construção In cooperation with: Direcção Regional da Cultura do Norte

15 CONSTRUCTION PRINCIPLES C Roofing CL PEE PEF VE Skylight Exterior wall Junction Exterior wall Façade Window Frame

16 EXTERNAL INSULATION Ventilated façade Quality Level E insulation* [mm] U [W/(m 2.ºC)] N1 50 0,60 N2 70 0,45 N ,36 * λ=0,04 [W/(m.ºC)]

17 ROOFING INSULATION Clay roof tiles Quality Level E insulation* [mm] U [W/(m 2.ºC)] N1 70 0,45 N ,34 N ,27 N ,23

18 SOLAR COLLECTORS avoid avoid

19 RESULTS REAL USE CONDITIONS (30% Nic e 0% Nvc) Heating specific needs Cooling specific needs DHW specific needs TOTAL Specific needs kwh/(m 2.yr) kgep/(m 2.yr) kwh/(m 2.yr) kgep/(m 2.yr) kwh/(m 2.yr) kgep/(m 2.yr) kgep/(m 2.yr) % reduction (primary energy) Existing (E) 66,6 19, ,1 11,6 31,0 - Rehabilitation without Collectors (R1) 28,3 8, ,2 4,1 12,3 60% Rehabilitation with Collectors (R2) 28,3 8, ,5 2,4 10,7 66%

20 SOLAR THERMAL SYSTEM FOR DOMETIC WATER ON SOCIAL HOUSING

21 Solar Thermal in the Social Housing Supply / Demand Promote renewable energies 5000 m 2 of solar thermal panels in the social housing How? Contracting an ESCO (Energy Services Company) to co-finance, project, construct, acquire, install, explore and maintain the solar thermal system Assure that the final consumer has environmental, energetic but also financial benefit Apply to European structural funds to co-finance the project In total use less m 3 /year of fossil fuels avoid >1000 ton of CO 2 /year

22 SOLAR THERMAL SYSTEMS IN EXISTING SOCIAL HOUSING 3 neighbourhoods 1242 families m 2 of solar panels > 60% of DHW needs from the Sun

23 RUTE Urban Heating and Cooling Network > 100 offices and services buildings 20 MW cold + 20 MW heat 2 or 3 trigeneration units

24 Some CONCLUSIONS The importance of cities where >50% of the world population lives in managing the sustainability issues; Priority: Demand management, which and how citizens use energy for their comfort and to produce goods and services; The importance of buildings, even in Portugal, paradise of renewable energies and soft solutions; The importance of individual decisions for a common value THINK GLOBAL ACT LOCAL

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