Sustainable buildings: a reality Local Renewables 2007, Freiburg 13-15 June 2007 Moderator: Dr Rajat Gupta, [email_address]
For millennia, we have lived in passive buildings
We know the climate is changing because of our actions
UK carbon emissions in 2000: 150 MtC Derived from DTI Energy Report 2000 Current Buildings are a large part of the problem Buildings can change rapidly without pain. Over 40% of final energy consumption in the European Community (EC) occurs in the buildings sector. Buildings 75 Million Tonnes (50%) 35 Million tonnes Industry 40 Million tonnes Transport Non-Domestic 35 Million tonnes Domestic 40 Million tonnes
Central London is up to 8 0 C hotter that Heathrow Irradiation mapping for 3D City Models (IESD, De Montfort University) Solar shading by buildings in irradiation maps Tall exposed buildings suffer most The Urban Heat Islands of Cities increase
Sustainable Buildings are part of the Solution
To be as low energy as possible to protect the occupants from the inevitable rises in energy cost.
Paradigm of sustainable buildings
To get as much of the energy needed as possible from renewable energy.
To have as little impact on the environment as possible in terms of water, waste materials, transport.
To make buildings that people love to live in.
Under the main provisions of the Directive, member states to
Apply a methodology to calculate the energy performance of buildings.
Apply minimum performance standards on all new buildings and on existing large buildings (over 1000 m 2 ), when subject to material alterations.
Ensure that when a building changes occupants an energy performance certificate is made available and displayed in all public buildings.
Legislative driver: EU Directive on Building Energy Performance
BEDZED Environmental Office, BRE Wessex Water Most importantly, people are, at last, asking for sustainable buildings! Titanic Mill refurbishment Beaufort Court, Herts National Assembly Building Cardiff Titanic Mill, Linthwaite Hockerton Housing, Notts
Sustainable design is not a style and that there is nothing called as ‘Sustainable Aesthetic’. Sustainability in buildings is about the performance of buildings, about designing every building on the fundamental premise that it must do as little environmental damage as possible. Understanding the benchmarks of building performance at every stage: DESIGN, CONSTRUCTION and OPERATION. The difficulty is to know how sustainable a building is?
Oxford Eco house (1994) Autonomous house, Southwell, Notts (1993) Hockerton Housing Project (1997) BEDZED, Sutton (2000) New build Eco-houses: case studies
(1998- BRECSU General Information Report 53) New build Eco-Houses: Benchmarks for annual energy
Typical 3-bed 1930’s semi After fabric and heating system upgrade Hot water and water storage upgrade. Low energy lighting and appliances (Source: Renewable energy in housing seminar at BRE, 2003) CO 2 emission bench marks for existing housing
CO 2 emissions from Type 0 Solar Offices can be over 90% less from a typical Type 4 Office – even less with green tariff power. Carbon dioxide Indices for typical, good practice and zero emission buildings (Adapted from: ECON 19)
Energy Consumption for Cooling (kWh/m2/y) Energy consumption for Cooling: Offices (Source: Professor Mat Santamouris, University of Athens, 2007) 300 Single Glazed Tower (70’s ) 210 Double Glazed Tower (90’s) 50 Insulated S.G. (80’s) 40 Insulated SD.G. (90’s) 15 Low Energy Design. (90’s) 5 Passive Office. (90’s)
Sustainable Habitat Design Adviser: SHADA
A GIS-based energy and emissions model: DECoRuM Provides the scientific-based platform to estimate baseline emissions of individual dwellings as well as on an urban scale. Predicts resulting CO 2 savings and cost-benefits of deploying energy efficiency measures and renewables in households. A tool to track progress of take-up of measures.
The Mataro Library, Barcelona We can use Solar Energy - even for air conditioning!
Tough choices have to be made!!!!
Three stimulating presentations have been lined up Passive Housing in Europe, low energy renovation and new housing complexes. Chiel Boonstra Trecodome, Netherlands; Secretary General of the International Solar Cities Initiative (ISCI)
Three stimulating presentations have been lined up Energy efficiency measures in the public building sector: the DEEP project. Philipp Tepper Project Officer, Sustainable Procurement, ICLEI Europe
Three stimulating presentations have been lined up Mediterranean example of local large-scale implementation of the European Directive on Energy Performance of Buildings Paolo Ferri Head of Energy Department, Province of Reggio Emilia, Italy
To know more, please come to Session A2: Sustainable buildings - a reality
Humanity Forward Sustainable buildings: a reality : living on the planet as if we intended to stay Thank you!