Bioclimatic Buildings

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Bioclimatic Buildings

Roberto LambertsFederal University of Santa Catarina

Laboratrio de Eficincia Energtica em Edificaes

www.labeee.ufsc.br


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Summary

World construction industry Un-Sustainable vs. Sustainable development

Sustainable construction

Construction in Brazil

Bioclimatic architecture Residencial sector

Commercial sector


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World Construction

The construction is one of the most important economicsectors in the world.

U$ 3 trillions are expended annually in the world, represent

1/10 of the global economy (CICA, 2002).

It constitutes 30% of the businesses in Europe, 22% in theUSA, 21% in Japan, 23% in the developing countries.


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World Construction

Buildings consume about 40% of theworld energy, 16% of the drinkingwater, 25% of the forests woods.(UNCHS 1993)

They are responsible for 50% of theCO2 emissions. (Petrocian, 2001)

They consume 30-40% of the

countries total energy demand.


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World Energy Consumption

Primary energy consumption

0

500

1000

1500

2000

2500

1965 1970 1975 1980 1985 1990 1995 2000

Mtep

USA

Canada

Brazil

Germany

Sweden

United Kingdom

Australia

China

Japan

China

USA

Japan

Germany

Brazil

24%

In Brasil 44.1% of the IEO has origin in renewable sources:

hydroelectric generation and biomass


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Un-sustainable development

Exhaustion of the naturalresources

Greenhouse effect

Serious economic results

Increase in the frequency andviolence of hurricanes andtropical storms

Increase of the sea level

Displacement of population


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Sustainable development

Ecologically correct

Socially fair Economically viable


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Sustainable constructions

Beddington Zero Energy Development. 2001. England


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Sustainable constructions

Use of recycled and renewable materials

Use of materials that incorporate low energy

LCA concept for the materials Use of certified wood

Water use reduction trough rainwater collection and reuse

Project for low maintenance

Recycling of materials

Reduction of pollutants

Preservation of the environment

Use of green roof Access to public transportation

Energy efficiency

Bioclimatic architecture


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Construction in Brazil

In Brazil the construction sector presents problems in part forthe lack of regulations and guidelines focoused in economy ofnatural resources and better performance of the buildings.

More sustainable/bioclimatic architecture is needed and moreregulations

But the context is changing.


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Electrical energy consumption in buildings in Brazil


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Energy Efficiency Law

17/10/2001 Law n 10.295

National policy of Conservation and Rational Use of Energy -all the equipment and constructions will have to respect

minimum levels of efficiency


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Energy Efficiency in buildings

Its cheaper TO SAVE energy than TO SUPPLY it !!!!


Use of renewable energy

Energy efficiency equipments


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Bioclimatic architecture relates the study of the climateapplied to architecture, searching with this to improve theconditions of thermal comfort of the ocupants, through theuse of appropriate project strategies considering the climaticdifferences for each place.

Building Thermal performance

Thermal comfort

Heating and passive solar cooling

Daylight Natural ventilation

Adequate shading

Brazilian bioclimatic zoning NBR 15220-3

CLIMATE + MAN + HABITAT


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Climatic data


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Project strategies Materials properties


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Residencial sector


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Brazilian Standard

Thermal Performance of low income houses and brazilian bioclimaticzoning - NBR 15220-3

INFORMATION FOREACH ZONE:

Project strategies forsummer and winter

Openings forventilation (%)

Openings shading

Thermal performance

of the materials


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Sustainable house

ELETROSUL

Efficient House Florianpolis, 2006


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Sustainable house

Project developed withsystems and solutions forthe maximum energyefficiency and thermalcomfort integrated to thearchitectural project.



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Sustainable house

Implemented technologies:

Bioclimatic adaptation

Fotovoltaic energy Passive strategies of air conditioning Solar water heating.



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Sustainable house

Strategies:

Solar orientation Crossed ventilation. Solar shading Use of local materials with less

environmental impact.

Double glass for windows withblinds



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Commercial sector


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Electrical Energy end use in offices

EscritriosIL = 50 %

AC = 34 %

Bancos

IL = 52 %AC = 34 %

RestauranteIL = 20 %

AC = 7 %

Shoppings CentersIL = 49 %

AC = 34 %Lojas do varejo

IL = 76 %AC = 12 %

OficinasIL = 56 %AC = 4 %

Posto degasolina

IL = 43 %

Servios pessoaisIL = 9 %AC = 3 %Mercearias

IL = 25 %AC = 2 %

1990

Mdia do setor:IL = 44 %

AC = 20 %Eq = 36%

Mdia do setor:IL = 44 %

AC = 20 %Eq = 36%


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Electrical Energy end use in offices

1990


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Architectural

Shading


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Lighting

Daylight integration

Example:

T5 - 28W

2.900 lm

103,6 lm/W


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Internal load: Equipments

Energy Saver


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Edifcio

INMETRO

Regulation for a label of energy efficiency level for commercial andpublic buildings

Regulations and CertificationAproved in september 2006

1. Terminology 2. Introduction 3. Lighting system

4. Conditioning system of air 5. Building envelope 6. Simulation


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Sustainable commercial building

Strategies:

Energyefficiency

Waterefficiency

Materials andresources

Indoorenvironmentalquality

Project Primavera Green Office Florianpolis


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Primavera Green Office

Strategies


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Energy efficiency in buildings

Efficient building envelope-bioclimatic

Efficient equipment Efficient User


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Sustainability?


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We have to change......

Documents

Bioclimatic Buildings