O II Ciclo de Palestras de ‘Economia Sustentável’ é promovido no âmbito das aulas práticas da unidade curricular de Economia da Energia e dos Recursos Naturais da Licenciatura de Economia do ISG – Business & Economics School e terão o apoio do CIGEST – Centro de Investigação em Gestão.
terça-feira, 26 de fevereiro de 2013
Germany’s energy reform
Partilhado por um colega do nosso curso, vamos começar a divulgar alguns artigos do jornal The Economist.
"LIKE many German regions, northern Saxony around Leipzig is humming with the word Energiewende. Literally “energy turn”, it could also mean “energy revolution”. And that is how Germany sees the twin goals it has set itself: to shut down nuclear power generation by 2022 and to get 80% of its power from renewable sources by 2050.
V3Solar puts a new spin on PV efficiency
Um novo conceito bastante interessante para o aproveitamento de energia fotovoltaica, tendo também sido relatado na imprensa nacional (link).
Retirado da revista Gizmag:
Retirado da revista Gizmag:
"For the vast majority of those looking to harvest energy from the sun to satisfy domestic or business electricity needs, the photovoltaic world is a static and flat one. Even many large scale solar farms feature row upon row of rigid panels, although there may at least be some movement as the panels follow the path of the sun as it moves across the sky. V3Solar's Spin Cell is a little different. It's claimed to be capable of generating over 20 times more electricity than a flat panel with the same area of PV cells thanks to a combination of concentrating lenses, dynamic spin, conical shape, and advanced electronics.
sábado, 16 de fevereiro de 2013
"Uma volta ao mundo movida a óleo vegetal"
"A sustentabilidade ambiental vai levar a portuguesa Rita Bragança e o uruguaiano Leandro Pans numa volta ao mundo. Movidos a óleo vegetal, o casal embarca numa viagem de automóvel para conhecer 50 países e comprovar que é possível percorrer o planeta através de uma "estrada de tijolos verdes".
por Márcia Moço
por Márcia Moço
Os dois jovens de 29 e 34, respetivamente, vão partir de Portugal já este mês para concretizar o sonho do Green Brick Road Project, projeto que pretende promover uma ideia simples com base na urgente necessidade de se adotar um estilo de vida sustentável.
quarta-feira, 13 de fevereiro de 2013
"Universidade de Lisboa já começou a instalar painéis fotovoltaicos"
Retirado do site GreenSavers:
Publicado em 13 de Fevereiro de 2013.
A Universidade de Lisboa (UL) está já a efectuar a ligação de cinco unidades de produção de electricidade a partir de painéis solares fotovoltaicos, a primeira fase de um projecto denominado Universidade Verde e que visa alcançar, até Outubro de 2013, um total de 2,8MW de potência instalada em toda a universidade – cerca de 11.480 painéis.
Os painéis estão a ser colocados nas coberturas das faculdades, parques de estacionamento e áreas de lazer. “A Universidade Verde teve início em 2010, surgindo como um ponto de encontro das várias iniciativas realizadas na UL no âmbito da sustentabilidade”, pode ler-se no site oficial do projecto.
sexta-feira, 8 de fevereiro de 2013
Can Sunshine Light Skyscrapers Instead of Bulbs?
"Using the sun to light office buildings instead of electricity saves energy. But is it affordable?
EFFICIENT LIGHTING: Can sunshine be used to cut down on lighting costs in skyscrapers, like the New York Times Building, shown here at night with lights on. Image: Flickr / Digiart 2001 / Jason Kuffer
The radiometer tracks the sun's progress across the Manhattan skyline and sends a signal from the roof to the command computer on a floor 90 meters below. Blinds fall slowly with the buzz of an electric motor, cutting off the sun's glare on computer screens. Another computer triggers the shades on the opposite side of the building to rise while another system shuts off the air-conditioning and adjusts the internal lights.
The New York Times Co. saves energy at its 52-story headquarters using the oldest lighting technology in the world: the sun. Floor-to-ceiling windows let sunlight flood into the office space and sensors then dim the internal lights to save energy. In the process, compared with other buildings in New York City, the Times Building has reduced its energy use by 24 percent, according to a new report prepared by Lawrence Berkeley National Laboratory (LBNL).
Letting the sun do the work of lighting up buildings is obvious. It's cheap, it's free and it's as easy as a window. Or, as managing director of Sustainable Energy Partnerships Adam Hinge says, "there are lessons we can relearn" from the building practices of the time before cheap fossil fuels and ubiquitous air-conditioning. As it stands, the energy used to light, cool and vent the buildings of the world's cities accounts for roughly 40 percent of humanity's carbon dioxide emissions, the greenhouse gas primarily responsible for climate change.
The New York Times Co. saves energy at its 52-story headquarters using the oldest lighting technology in the world: the sun. Floor-to-ceiling windows let sunlight flood into the office space and sensors then dim the internal lights to save energy. In the process, compared with other buildings in New York City, the Times Building has reduced its energy use by 24 percent, according to a new report prepared by Lawrence Berkeley National Laboratory (LBNL).
Letting the sun do the work of lighting up buildings is obvious. It's cheap, it's free and it's as easy as a window. Or, as managing director of Sustainable Energy Partnerships Adam Hinge says, "there are lessons we can relearn" from the building practices of the time before cheap fossil fuels and ubiquitous air-conditioning. As it stands, the energy used to light, cool and vent the buildings of the world's cities accounts for roughly 40 percent of humanity's carbon dioxide emissions, the greenhouse gas primarily responsible for climate change.
Tiny Rooftop Turbine Could Make Urban Wind Farms A Reality
There's a reason that wind farms are placed offshore rather than in urban areas—the turbines are typically huge, difficult to erect, and need a solid sustained gust to produce any meaningful amount of current. This prototype, on the other hand, will assemble easily and take up little space as it quietly produces kilowatts atop skyscrapers.
Conventional wind farms need wind that is both steady and strong but with very little turbulence. Their turbines are mounted atop 300-foot pylons to avoid the roiling currents at ground level and employ enormous blades to drive their MW generators. Everything operates on a grand scale with these farms, but they're impractical in an urban environment.
Yet cities can be so windy—tightly-packed buildings funnel and redirect natural air currents, resulting in irregular, gusty winds. That's exactly what conventional turbines can't handle. What's more, finding the real estate to safely install a 300-foot tall turbine in the middle of, say, New York City, is impossible. So a new vertical-axis turbine, the McCamley MT01 Mk2, is a designed specifically these dense urban areas.
Conventional wind farms need wind that is both steady and strong but with very little turbulence. Their turbines are mounted atop 300-foot pylons to avoid the roiling currents at ground level and employ enormous blades to drive their MW generators. Everything operates on a grand scale with these farms, but they're impractical in an urban environment.
Yet cities can be so windy—tightly-packed buildings funnel and redirect natural air currents, resulting in irregular, gusty winds. That's exactly what conventional turbines can't handle. What's more, finding the real estate to safely install a 300-foot tall turbine in the middle of, say, New York City, is impossible. So a new vertical-axis turbine, the McCamley MT01 Mk2, is a designed specifically these dense urban areas.
quarta-feira, 6 de fevereiro de 2013
Lights out – France to force shops and offices to go dark overnight
Retirado do jornal Guardian:
Katie Davies
"French light pollution law is expected to save 250,000 tonnes of CO2 a year
Katie Davies
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France's light pollution law comes into effect on 1 July. Photograph: Guardian
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