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Thursday, March 20, 2014

WORLD'S LARGEST SOLAR PLANT

The Ivanpah Solar Electric Generating System is now operational and delivering solar electricity to California customers. At full capacity, the facility’s trio of 450-foot high towers produces a gross total of 392 megawatts (MW) of solar power, enough electricity to provide 140,000 California homes with clean energy and avoid 400,000 metric tons of carbon dioxide per year, equal to removing 72,000 vehicles off the road.

All Three Units of 392 megawatt Ivanpah Solar Electric Generating System Now Delivering Solar Power to California’s Electric Grid. Take 300,000 computer-controlled mirrors, each 7 feet high and 10 feet wide. Control them with computers to focus the Sun’s light to the top of 459-foot towers, where water is turned into steam to power turbines. Bingo: you have the world’s biggest solar power plant, the Ivanpah Solar Electric Generating System.

Long-mired by regulatory issues and legal tangles, the enormous solar plant–jointly owned by NRG Energy, BrightSource Energy and Google–opened for business today.

 Sprawling across a staggering 5 square miles of federal land near the California-Nevada border, it looks god damn beautiful.

As a step towards 'Green Campus', 1MW Solar PV Power Plant inaugurated at IIT Bombay

Mumbai, January 28, 2014: As a part of its 'Green Campus' initiative, Indian Institute of Technology Bombay (IIT Bombay), is installing a 1MWp (1 MW peak PV power) distributed rooftop Solar PV Power Plant on the roofs of its academic buildings. The Solar Power Plant was inaugurated on January 28, 2014 by Dr. Satish Agnihotri, Secretary, Ministry of New & Renewable Energy, Government of India, in the presence of Prof. Devang V. Khakhar, Director, IIT Bombay, at the Institute Campus.

Solar Photovoltaic (PV) technology is growing in importance worldwide as credible technology for supply of electricity for terrestrial applications. IIT Bombay has National Center for Photovoltaic Research and Education (NCPRE) established as part of Jawaharlal Nehru National Solar Mission (JNNSM) to promote research and education in solar PV. Additionally, IIT Bombay is endeavouring towards making its campus green. One of the ways towards it is to install PV power plants in academic area of the campus for partial generation of the required electricity during daytime. 

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Wednesday, March 19, 2014

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In what way do I protect the environment with solar electricity?


A solar power system not only allows you to become less exposed to ever-increasing energy costs, but also enables you to protect the environment, as electricity generated by a solar power system eliminates many tons of CO2 emissions. for instance, 700 grams of CO2 are emitted on average to produce a kilowatt hour of household electricity in coal, gas and nuclear power plants. In contrast, a solar power system cuts emissions by 569 grams per kilowatt hour and year. Thus, 3.6 million tons of CO2 were eliminated in 2009 as a result of all the installed solar power systems.

Is my roof actually suitable?

As a general rule, solar power systems can be installed in any location where there is sufficient light. A south-facing surface achieves optimum yield at an angle of about 30°. A variation in orientation towards the south-west or south-east or in pitch between 25° and 60° will only reduce the energy yield slightly. Shade produced by trees, adjacent buildings, gables, aerials and similar should be avoided, as they reduce the electricity yield considerably.

Mounting systems are used in the case of flat roof, pitched roof or open area systems and guarantee an optimum orientation for photovoltaic modules.

On-roof
For all existing pitched roof surfaces: an on-roof system is installed without affecting the impermeability of the membrane on an existing roof.

Flat roof
For flat roofs, there are frame and tub systems which securely support modules at an optimum angle to the sun.



Open area
Systems which can be perfectly adjusted to varying or uneven substrates and landscapes; used as stand-alone applications or in solar parks.

How does sun become electricity?

The sun supplies us with energy in the form of electromagnetic radiation on a daily basis. This radiation can be exploited with the help of the photovoltaic effect. To do so, the semi-conductor material silicon is used, for instance. When a thin silicon disc is exposed to irradiation, electrons are set free and can be used to create electricity. The silver grey silicon discs are known as wafers once the production process is reached. To increase a wafer's yield, a special coating is applied which gives solar cells their distinctive blue or black colouring. A thin lattice consisting of metallic conductive strips is also affixed to ensure that the current can be conducted and used. Once this production stage is completed, wafers then become solar cells. The solar cells are arranged in rows and interconnected in so-called strings. Several strings are placed next to one another to form a photovoltaic module, which is then laminated in the last production stage to make it airtight and waterproof. The module is now ready to convert sunlight into electrical energy.

As photovoltaic modules generate direct current which AC networks cannot transmit, a further component is required for a complete solar power system: a so-called inverter transforms solar direct current into alternating current, which can then either be used directly on-site in the building or fed into the electrical grid.

What is solar electricity? And what are photovoltaics?

Photovoltaics is the direct conversion of solar energy into electrical energy. The term 'photovoltaics' is made up of the word 'photo' – the Greek word for light – and 'volta' – after Alessandro Volta, a pioneer in electro-technology ('photovoltaic effect").

Manufacturing procedure from Sand to Module.

       1.Silicon

Silicon
Silicon is the starting point of our solar production cycle. It is extracted from sand which is made up primarily of silicon dioxide. As the second most common element of the earth’s crust, there is an almost endless supply. 

Why solar power?

The sun is the resource of the 21st century.

Scarcity of resources, environmental degradation and damage to the environment are the most obvious disadvantages of oil, gas and coal. Moreover, fossil fuels, fossil fuel power stations and centralised power grids also make our society dependent on large corporations and undemocratic regimes. Such gigantic infrastructures are also far too expensive for developing countries, whatever happens. Renewable energies are thus the only way to guarantee an ecological, just energy supply in the future. Nuclear power does not provide an alternative either, as it is not only extremely hazardous, but is also actually a very expensive, finite resource which is by no means climate friendly.

SolarWorld e-One

Flying high on solar power: SolarWorld e-One is a self-sufficient electrically-powered flight system consisting of solar cells, a lithium ion battery and an electric engine. The solar plane is emission-free and powered exclusively by solar energy. The prototype is based on the ultra-light Elektra One Solar plane designed by PC-Aero GmbH.

Tuesday, March 18, 2014

Solar News: Solar Fuels from Berkeley Lab Researchers at JCAP

Solar Fuels from Berkeley Lab Researchers at JCAP by Lynn Yarris for Berkeley News Berkeley CA (SPX) Mar 08, 2014.













     From left, Diana Cedeno, Gary Moore and Alexandra Krawicz of the Joint Center for Artificial Photosynthesis conducted an efficiency analysis study of a unique photocathode material designed to store solar energy in hydrogen molecules. Image courtesy Roy Kaltschmidt.
There's promising news from the front on efforts to produce fuels through artificial photosynthesis. A new study by Berkeley Lab researchers at the Joint Center for Artificial Photosynthesis (JCAP) shows that nearly 90-percent of the electrons generated by a hybrid material designed to store solar energy in hydrogen are being stored in the target hydrogen molecules.
Gary Moore, a chemist and principal investigator with Berkeley Lab's Physical Biosciences Division, led an efficiency analysis study of a unique photocathode material he and his research group have developed for
catalyzing the production of hydrogen fuel from sunlight. This material, a hybrid formed from interfacing the semiconductor gallium phosphide with a molecular hydrogen-producing cobaloxime catalyst, has the potential to address one of the major challenges in the use of artificial photosynthesis to make renewable solar fuels.

Monday, March 17, 2014

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