Netizen: Watt

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Thursday, March 05, 2015

Sahara And Amazon And Solar

A few days back I came across this video. And it is fascinating. It is showing that the Amazon forest (full of life) is totally dependent on the Sahara (lifeless) for its very survival. This is mind blowing. Mother Nature.

Another thing I see is, the Sahara could also meet all of Africa's energy needs. Used to be solar was expensive and complex. Not any more.

The coming era of unlimited — and free — clean energy
Why Obama should stop pushing nuclear energy on India
Unlimited Free Solar Power?

Solar Energy Revolution: A Massive Opportunity http://t.co/bblDqsqC53 by @peterdiamandis -- 100% solar energy within 20 years amazing
— Vivek Wadhwa (@wadhwa) September 3, 2014

The Sahara alone could meet all of Africa's energy needs. The Sahara probably is the best place on earth to harness solar energy. And, guess what, the Sun is not going anywhere. The oil fields of Saudi Arabia will run dry, but the earth will evaporate before the sun will disappear. I think the Sahara could generate 1,000 GW easy. Imagine a solar panel - one panel - the size of Texas.

Africa could become the leading continent on earth based just on Sahara's solar energy. It truly is the central continent. It is closer to every other continent than any other. Which means, it could end up the manufacturing hub of the world.

Africa so deserves a political union. It only makes sense that Africa should become one country. Because political leadership is what has been in the way. Or rather, lack of it. The continent that deserves to be the richest is the poorest.

The Sahara is in need of a serious image makeover. It is not lifeless. It is the opposite. It is life-sustaining.

Monday, June 24, 2013

Conventional Crystalline Silicon

Solar is sexy.

What Tech Is Next for the Solar Industry?

conventional crystalline silicon ..... would bring the direct cost of solar power to six cents per kilowatt-hour, which is cheaper than the average cost expected for power from new natural gas power plants ..... screen-printing techniques can produce lines as thin as 30 micrometers .... the ability to make them on a flexible sheet of glass raises the possibility of continuous roll-to-roll manufacturing (like printing newspapers), which can reduce the cost per watt by increasing production. ... a two-sided solar cell that can absorb light from both the front and back. .... during some parts of the day, sunlight falls on the land between rows of solar panels in a solar power plant. That light reflects onto the back of the panels and could be harvested to increase the power output. ... Where a one-sided solar panel might generate 340 watts, a two-sided one might generate up to 400 watts. .... Such solar panels could be mounted vertically, like a fence, so that one side collects sunlight in the morning, and the other in the afternoon. That would make it possible to install the solar panels on very little land—they could serve as noise barriers along highways .... Adding one semiconductor could boost efficiencies from the 20 to 25 percent range to around 40 percent. Adding another could make efficiencies as high as 50 percent feasible, which would cut in half the number of solar panels needed for a given installation. The challenge is to produce good connections between these semiconductors, something made challenging by the arrangement of silicon atoms in crystalline silicon.

Monday, July 30, 2012

Pragmatic Solar

English: Solar panel installation at an information center adjacent to Ögii Lake (Photo credit: Wikipedia)

Cheaper than fossil fuels is that magical line.

Ultra-Efficient Solar

Semprius's solar panels use glass lenses to concentrate incoming light .... using materials other than silicon, the most common semiconductor in solar panels today. ....... a highly efficient material called gallium arsenide ..... maximizes their power production by putting them under glass lenses that concentrate sunlight about 1,100 times. ..... Semprius's small cells produce so little heat that they don't require cooling, which further brings down the cost. ..... make enough solar panels annually to deliver six megawatts of electricity. The company hopes to expand that to 30 megawatts by the end of 2013 .... conventional silicon panels, whose prices fell by more than half in 2011 alone.

Massive Power Outage In India

Hydroelectric dam (Photo credit: Wikipedia)

When about a third of the people in a country the size of India (US + Europe + Africa) lose power, that is massive.

What the India Blackout Says About India's Frailties

Even for India, though, the blackout that began in the early hours of Monday was extraordinary. Nearly 360 million people—more than the population of the U.S. and Canada combined—lost power across seven states in northern India when excessive demand and a shortfall in hydro power overwhelmed the electricity grid. The worst blackout in a decade started at 2:32 in the morning, leaving people sweltering in their homes and stopping service on trains and subways in Delhi..... Slightly more than 12 hours later, power resumed in the capital...... The less-than-normal rainfall has put strains on India’s hydroelectric power supply, which accounts for 19 percent of the country’s 205 gigawatt generation capacity ..... The blackout “is symbolic of the infrastructure bottlenecks of the country” ...... The government wants to spend $400 billion over the next five years on power-sector investment, adding 76 gigawatts of capacity by 2017. That’s on top of the 85 gigawatts of power India has added in the past 10 years.