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dpurdy

Historical Overview - 0 views

www.pvresources.com/...historicaloverview.aspx

solar history

shared by dpurdy on 20 Sep 13 - No Cached
  • 90 years ago - in 1921 Albert Einstein was awarded a Nobel Prize for explanation of the PV-effect. 70 years ago - in 1941, the first silicon monocrystalline solar cell was constructed. 60 years ago - in 1951, the first germanium solar cells have been made.
  • 1958, the same company introduced a solar cell with 9 % efficiency. The first radiation-proof silicon solar cell was produced for the purposes of space technology in the same year. On 17th March, the first satellite powered by solar cells, Vanguard I, was launched. The system ran continuously for 8 years.
dylan purner

Energy Basics: Photovoltaics - 1 views

www.eere.energy.gov/...photovoltaics.html

solar history

shared by dylan purner on 08 Mar 13 - No Cached
  • First used in about 1890, "photovoltaic" has two parts: photo, derived from the Greek word for light, and volt, relating to electricity pioneer Alessandro Volta. And this is what photovoltaic materials and devices do—they convert light energy into electrical energy, as French physicist Edmond Becquerel discovered as early as 1839.
  • kenyonlau99 on 08 Mar 13
     
    "First used in about 1890, "photovoltaic" has two parts: photo, derived from the Greek word for light, and volt, relating to electricity pioneer Alessandro Volta. And this is what photovoltaic materials and devices do-they convert light energy into electrical energy, as French physicist Edmond Becquerel discovered as early as 1839. Becquerel discovered the process of using sunlight to produce an electric current in a solid material. But it took more than another century to truly understand this process. Scientists eventually learned that the photoelectric or photovoltaic effect caused certain materials to convert light energy into electrical energy at the atomic level. PV systems are already an important part of our daily lives. Simple PV systems provide power for small consumer items such as calculators and wristwatches. More complicated systems provide power for communications satellites, water pumps, and the lights, appliances, and machines in some homes and workplaces. Many road and traffic signs also are now powered by PV. In many cases, PV power is the least expensive form of electricity for these tasks."
kirkpatrickcon99

Getting More from Wind Turbines with Condition Monitoring Systems - 0 views

www.renewableenergyworld.com/...h-condition-monitoring-systems

wind history

shared by kirkpatrickcon99 on 20 Sep 13 - No Cached
  • Another benefit of condition monitoring is that it allows condition-based maintenance. Instead of replacing components after fixed time intervals based on empirical values, they can be replaced only when required, such as when signs of wear are detected.
kirkpatrickcon99

Articles about Wind Turbines - Chicago Tribune - 0 views

articles.chicagotribune.com/...wind-turbines

wind current

shared by kirkpatrickcon99 on 20 Sep 13 - No Cached
  • The world will have enough wind turbines to generate more than 300 gigawatts of power - the equivalent of 114 nuclear power plants
dylan purner

Business Opportunities Assessment for Solar Photovoltaic (PV) Market in Brazil - 0 views

www.prweb.com/...prweb11130878.htm

photovoltaic solar cost opportunities business

shared by dylan purner on 20 Sep 13 - No Cached
  • The Brazilian government still awaits a reduction in solar prices to create a specific auction by the end of 2013 or the beginning of 2014. However, the Ministry of Mines and Energy (MME) does not demonstrate any signs of this happening.
  • In 2013, however, revenue and capacity installed are expected to double: projects will be delivered, the resolution 482/2012 will have a major impact, and X% of the National Association of Electric Energy’s (ANEEL’s) research and development (R&D) will conclude. Capacity installed expectations in 2013 will near X megawatts (MW); in 2014, X MW; in 2015, X MW; and beyond, faster expansion is expected. Currently, capacity installed for the solar market is X MW, but it is expected to reach X MW by 2017. The total possible capacity installed for Brazil is close to X gigawatts (GW). This market revenue will have a X% compound annual growth rate (CAGR) during the forecast period (2012–2017) due to ANEEL´s R&D, international events, and the resolution 482/2012 cost reductions. Now, market revenue is close to $X million and can reach $X million by 2017.
  • Distributed generation could grow faster with financial support, better service from energy concessionaries, and cost reductions; nonetheless, it will grow considerably.
  • ...2 more annotations...
  • Distributed microgeneration: electricity generating system, with capacity installed less than or equal to
  • kilowatts (kW); uses solar energy connected to the distribution network through facilities of consumer units Distributed minigeneration: electricity generating system with a capacity installed greater than 100 kW and less than or equal to X MW for the same sources; connected to the distribution network through facilities of consumer units
mattisonmar00

Know it kid: Where does the wind come from? - 0 views

www.knowitkid.com/...where-does-wind-come-from.html

wind form

shared by mattisonmar00 on 20 Sep 13 - No Cached
  • "As the sun warms the Earth's surface, the atmosphere warms too. Some parts of the Earth receive direct rays from the sun all year and are always warm. Other places receive indirect rays, so the climate is colder. Warm air, which weighs less than cold air, rises. Then cool air moves in and replaces the rising warm air. This movement of air is what makes the wind blow."
dylan purner

Global photovoltaic installations to grow 23% year-on-year - The Times of India - 0 views

timesofindia.indiatimes.com/...22518237.cms

installations photovoltaic solar

shared by dylan purner on 20 Sep 13 - No Cached
  • Over 19,000 MW of non-residential PV project applications have been approved under its FiT scheme as of the end of May.
  • Over 19,000 MW of non-residential PV project applications have been approved under its FiT scheme as of the end of May.
  • With a 2013 forecast of 8.5 GW and 7 GW respectively, China and Japan are on pace to be the top installers this year. PV installations in the United States continue to grow and are forecasted to reach approximately 4.5 GW in 2013. Other major markets forecasted in 2013 are Germany at 4 GW, Italy at 2 GW, UK at 1.5 GW and India at 1 GW.
gordonaus00

Solar Training, Solar Photovoltaic Training, Solar Installer Training, Renewable Energy... - 0 views

www.solarenergy.org

shared by gordonaus00 on 20 Sep 13 - Cached
  • APSA) program which will also include a second online course on battery-based PV systems and a 6 day hands-on photovoltaics workshop at the Earth University-La Flor in Liberia, Costa Rica.
dpurdy

Coal Burning, Fossil Fuels, Pollution - National Geographic - 0 views

environment.nationalgeographic.com/...high-cost-coal

pollution fossil fuels

shared by dpurdy on 17 Sep 13 - No Cached
  • dpurdy on 17 Sep 13
     
    We have more coal than other countries.
dpurdy

The hidden costs of fossil fuels - and biofuels, too - CSMonitor.com - 1 views

www.csmonitor.com/...-fossil-fuels-and-biofuels-too

fossil fuels pollution cost biofuel

shared by dpurdy on 06 Apr 13 - No Cached
  • Climate considerations aside, damages wrought by ethanol made from corn were usually similar to, or even slightly worse, than damages from gasoline. That’s because of the extra energy needed to convert corn to biofuel.
dpurdy

NRDC: American Wind Farms - 2 views

www.nrdc.org/...american-wind-farms.asp

wind current

shared by dpurdy on 12 Mar 13 - No Cached
  • Today, wind farms generate about 50,000 megawatts of clean, renewable energy -- the equivalent of the energy produced by 12 Hoover Dams.
  • willisjos98 on 12 Mar 13
     
    "Today, wind farms generate about 50,000 megawatts of clean, renewable energy -- the equivalent of the energy produced by 12"
dpurdy

EnergyBC: Tidal Power - 2 views

www.energybc.ca/...tidal.html

tide form convert history

shared by dpurdy on 12 Mar 13 - No Cached
  • his is somewhat balanced out by long plant lives of 100 years for the actual barrage structure, and 40 for the equipment, as well as low operating costs.
  • An estimate is given by researcher Eleanor Denny. Denny estimates that in order for a facility to be profitable, its capital cost should be less than €530,000 (~$700,000 USD) per MegaWatt which with the current technology is not a realistic goal, meaning that so far the industry produces negative net benefits.50
  • Canada's Race Rocks site, where a single turbine generator converts 65 kW of energy, cost $4,000,000.54 This figure was met with $3,000,000 investment from project partner EnCana's Environmental Innovation Fund, and a grant of just under $1 million awarded to Pearson College and their partners in the project.
  • ...5 more annotations...
  • This plant produces about 100 times the power generated at Race Rocks. An investment of around €8.5 million ($11 million USD) made SeaGen a reality.
  • , they are, by nature, reliant on the natural environment and therefore are vulnerable to the effects of climate change
  • sustainable energy resources produce limited amounts of carbon dioxide emissions
  • The environmental impacts of tidal barrage include hampered fish migration, forced water level changes on the basin behind the barrage, reduced salinity in the basin due to low quantities of ocean water, and reduced ability of currents to transport and suspend sediments
  • Brief History of Tidal Power The energy stored in tides been known to people for many centuries. The earliest records of tidal mills are dated back to the 8th Century CE.7 The tidal mills were mainly used for grain grinding and were of similar design to the conventional water mills with the exception of the addition of a dam and reservoir. The industrial revolution increased demand for power but tidal energy never got off the ground, undercut by cheap fossil fuels and other developments which offered easier access to power generation. Existing tidal mills became as obsolescent as pre-industrial water-mills. The first large scale modern tidal electric plant started to operate in La Rance Estuary, St. Malo, France in the 1960s and has been operating ever since. In recent years the search for renewable, non-polluting energy sources and the increase in fossil fuel prices has encouraged renewed interest in tidal power.
dpurdy

Tidal Power - Costs - Pros & Cons - How it Works - Green Energy - 0 views

clean-future.com/...tidal-power

tide form convert

shared by dpurdy on 06 Apr 13 - No Cached
  • Tidal power is a predictable source of energy unlike that of wind power and solar power because the tides follow the gravitational pull of the moon. The general production of tidal energy is similar to other forms of hydroelectric power where the force of water flow spins a turbine which generates energy.
  • he tidal stream generator uses the kinetic energy of the flowing tide to spin windmill like turbines. It is also often referred to as a tidal energy converter (TEC).
  • Tidal power is the production of electricity by the utilization of tidal energy.
dpurdy

WHTP Marine Hydrokinetic Technologies Database: Project Profile - 0 views

www1.eere.energy.gov/...GlobalProjectMap.aspx

wave current

shared by dpurdy on 06 Apr 13 - No Cached
  • dpurdy on 06 Apr 13
     
    Current wave energy projects world wide.
dpurdy

How much CO2 does one solar panel create? | MNN - Mother Nature Network - 2 views

www.mnn.com/...o2-does-one-solar-panel-create

solar co2 fossil fuels

shared by dpurdy on 06 Apr 13 - Cached
  • solar panels are at least 20x better on the climate than coal, kWh for kWh.
  • Based on that study, solar PV works out to about 50g of CO2 per kWh compared to coal's 975g of CO2 per kWh, or about 20x "cleaner."
  • dpurdy on 06 Apr 13
     
    Comparison of CO2 from photovoltaics and coal. 
dpurdy

NASA - Ask an Expert: All About the Sun! - 0 views

www.nasa.gov/...solar_chat2.html

solar sustainable

shared by dpurdy on 06 Apr 13 - No Cached
  • How many years is left before the sun dies? David: About 4.5 billion years, give or take a billion. :)
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