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The objective of the International Sustainable Energy Organization for Renewable Energy and Energy Efficiency (ISEO) with headquarters in Geneva is to accelerate and enlarge the worldwide contribution of clean, sustainable energy to economic and equitable social development. Gustav R. Grob founded ISEO for the United Nations in 2002.
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Photovoltaics (PV) is the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry. The photovoltaic effect is commercially utilized for electricity generation and as photosensors.
The use of energy is considered sustainable if it meets the needs of the present without compromising the needs of future generations. Definitions of sustainable energy typically include environmental aspects such as greenhouse gas emissions, and social and economic aspects such as energy poverty. Renewable energy sources such as wind, hydroelectric power, solar, and geothermal energy are generally far more sustainable than fossil fuel sources. However, some renewable energy projects, such as the clearing of forests to produce biofuels, can cause severe environmental damage. The role of non-renewable energy sources has been controversial. Nuclear power is a low-carbon source and has a safety record comparable to wind and solar, but its sustainability has been debated because of concerns about nuclear proliferation, radioactive waste and accidents. Switching from coal to natural gas has environmental benefits but may lead to a delay in switching to more sustainable options. Carbon capture and storage technology can be built into power plants to remove their carbon dioxide emissions, but is expensive and has seldom been implemented.
An energy-plus building produces more energy from renewable energy sources, over the course of a year, than it imports from external sources. This is achieved using a combination of microgeneration technology and low-energy building techniques, such as: passive solar building design, insulation and careful site selection and placement. A reduction of modern conveniences can also contribute to energy savings, however many energy-plus houses are almost indistinguishable from a traditional home, preferring instead to use highly energy-efficient appliances, fixtures, etc., throughout the house.
A solar cell, or photovoltaic cell, is an electrical device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physical and chemical phenomenon. It is a form of photoelectric cell, defined as a device whose electrical characteristics, such as current, voltage, or resistance, vary when exposed to light. Individual solar cell devices are often the electrical building blocks of photovoltaic modules, known colloquially as solar panels. The common single junction silicon solar cell can produce a maximum open-circuit voltage of approximately 0.5 to 0.6 volts.
Sustainable architecture is architecture that seeks to minimize the negative environmental impact of buildings by efficiency and moderation in the use of materials, energy, development space and the ecosystem at large. Sustainable architecture uses a conscious approach to energy and ecological conservation in the design of the built environment.
A solar panel, or photo-voltaic (PV) module, is an assembly of photo-voltaic cells mounted in a framework for installation. Solar panels use sunlight as a source of energy to generate direct current electricity. A collection of PV modules is called a PV panel, and a system of PV panels is called an array. Arrays of a photovoltaic system supply solar electricity to electrical equipment.
Renewable heat is an application of renewable energy referring to the generation of heat from renewable sources; for example, feeding radiators with water warmed by focused solar radiation rather than by a fossil fuel boiler. Renewable heat technologies include renewable biofuels, solar heating, geothermal heating, heat pumps and heat exchangers. Insulation is almost always an important factor in how renewable heating is implemented.
Clean technology, in short cleantech, is any process, product, or service that reduces negative environmental impacts through significant energy efficiency improvements, the sustainable use of resources, or environmental protection activities. Clean technology includes a broad range of technology related to recycling, renewable energy, information technology, green transportation, electric motors, green chemistry, lighting, grey water, and more. Environmental finance is a method by which new clean technology projects that have proven that they are "additional" or "beyond business as usual" can obtain financing through the generation of carbon credits. A project that is developed with concern for climate change mitigation is also known as a carbon project.
Renewable energy commercialization involves the deployment of three generations of renewable energy technologies dating back more than 100 years. First-generation technologies, which are already mature and economically competitive, include biomass, hydroelectricity, geothermal power and heat. Second-generation technologies are market-ready and are being deployed at the present time; they include solar heating, photovoltaics, wind power, solar thermal power stations, and modern forms of bioenergy. Third-generation technologies require continued R&D efforts in order to make large contributions on a global scale and include advanced biomass gasification, hot-dry-rock geothermal power, and ocean energy. As of 2012, renewable energy accounts for about half of new nameplate electrical capacity installed and costs are continuing to fall.
The Environmental and Energy Study Institute(EESI) is an independent, bi-partisan 501(c)(3) non-profit organization that aims to promote environmentally sustainable societies. Based out of Washington, DC, EESI seeks to be a catalyst moving society away from environmentally damaging fossil fuels and toward a clean energy future. The organization was established in 1984 by a bipartisan and bicameral group of members of the United States Congress who were concerned with global environmental and energy problems.
The Climate Investment Funds (CIF) is one of the world’s largest multilateral funds working to pilot and scale climate solutions in developing countries. Established at the request of the G8 and G20 in 2008, CIF administers a collection of programs that help resource-strapped nations fight the impacts of climate change and accelerate the shift to a low-carbon economy. Through contributions from 14 donor countries, CIF is supporting more than 350 projects in 72 low and middle-income countries on the frontlines of the climate crisis.
Concentrated solar power systems generate solar power by using mirrors or lenses to concentrate a large area of sunlight onto a receiver. Electricity is generated when the concentrated light is converted to heat, which drives a heat engine connected to an electrical power generator or powers a thermochemical reaction.
This page is an index of sustainability articles.
Cadmium telluride (CdTe) photovoltaics describes a photovoltaic (PV) technology that is based on the use of cadmium telluride in a thin semiconductor layer designed to absorb and convert sunlight into electricity. Cadmium telluride PV is the only thin film technology with lower costs than conventional solar cells made of crystalline silicon in multi-kilowatt systems.
The Sun Ship , a large integrated office/retail building, built in 2004 in Freiburg im Breisgau's Vauban quarter as part of the Solar Settlement at Schlierberg. Sonnenschiff was designed by the architect Rolf Disch and generates four times more energy than it uses.
Rolf Disch Solar Architecture, creators of the Heliotrope as well as several other visionary green building projects, is based in the solar city Freiburg, Germany. Led by solar pioneer Rolf Disch, who has been building with the sun for more than 40 years, this architecture office's prolific portfolio also includes such successful projects as the Solar Settlement and the Sun Ship. As winners of the 2002 European Solar Prize and the 2003 Global Energy Award these projects demonstrate the power of solar architecture; harness the sun both passively and actively. Lying at the base of the Black Forest, in the sunniest city in Germany, Rolf Disch Solar Architecture offers a premium design that exceeds the highest ecological standards while creating profitable opportunities for their investors.
The Solar Settlement at Schlierberg is a 59-home PlusEnergy housing community in Freiburg, Germany. Solar architect Rolf Disch wanted to apply his PlusEnergy concept, created originally with his Heliotrope home, to mass residential production. This residential complex won such awards as House of the Year (2002), Residential PV solar integration award (2002), Germany's most beautiful housing community (2006). It is the first housing community in the world in which all the homes produce a positive energy balance and which is emissions-free and CO
2 neutral. The settlement also features an underground parking lot to keep the streets car free.
The Ladakh Ecological Development and Environmental Group (LEDeG) is an environmental NGO based in Karzoo, Leh, Ladakh Union Territory in northern India. In 1986, it received the Right Livelihood Award "for preserving the traditional culture and values of Ladakh against the onslaught of tourism and development."
Thermodynamic efficiency limit is the absolute maximum theoretically possible conversion efficiency of sunlight to electricity. Its value is about 86%, which is the Chambadal-Novikov efficiency, an approximation related to the Carnot limit, based on the temperature of the photons emitted by the Sun's surface.
Floating solar, sometimes called floatovoltaics, refers to a solar power production installation mounted on a structure that floats on a body of water, typically an artificial basin or a lake.
