Space-based solar power has had a slow start, but the technology may finally take off in the next few decades. Since its inception, solar power has had a severe limitation as a renewable energy: it only works when the Sun is shining. This has restricted the areas where solar panels can be effectively used to sunnier, drier regions, such as California and Arizona. And even on cloudless days, the atmosphere itself absorbs some of the energy emitted by the Sun, cutting back the efficiency of solar energy. And let’s not forget that, even in the best of circumstances, Earth-bound solar panels are pointed away from the Sun half of the time, during the night.
So, for over half a decade, researchers from NASA and the Pentagon have dreamed of ways for solar panels to rise above these difficulties, and have come up with some plausible solutions. There have been several proposals for making extra-atmospheric solar panels a reality, many of which call for a spacecraft equipped with an array of mirrors to reflect sunlight into a power-conversion device. The collected energy could be beamed to Earth via a laser or microwave emitter. There are even ways to modulate the waves’ energy to protect any birds or planes that might wander into the beam’s path.
The energy from these space-based solar panels would not be limited by clouds, the atmosphere, or our night cycle. Additionally, because solar energy would be continuously absorbed, there would be no reason to store the energy for later use, a process which can cost up to 50 percent of the energy stored.
The largest floating solar power plant in the world is now online in China. Floating where coal used to be mined, the installation is helping China transition toward renewables and making the most of its surroundings.
The world’s largest floating solar power plant is now online in China. Built by Sungrow, a supplier of PV inverter systems, the 40MW plant is now afloat in water four to 10 meters deep, and successfully linked to Huainan, China’s grid. The placement was chosen in large part because the area was previously the location of coal mining operations; and, as a result, the water there is now mineralized and mostly useless. The lake itself was only formed after years of mining operations, the surrounding land collapsed and created a cavity that was filled with rainwater.
China electricity output from photovoltaic plants rose 80 per cent in the first quarter after the world’s biggest solar power market increased installed capacity.
Solar power generation rose to 21.4 billion kilowatt-hours in the three months ending 31 March from a year earlier, the National Energy Administration said on Thursday in a statement on its website. China added 7.21 gigawatts of solar power during the period, boosting its total installed capacity to almost 85 gigawatts, the NEA said.
The power-generation increase comes even as more solar plants stand idle because of congested transmission infrastructure. China idled about 2.3 billion kilowatt-hours of solar power in the first quarter, up from 1.9 billion kilowatt-hours a year earlier, according to the NEA data.
A work crew for the Pittsburgh company Energy Independent Solutions installs solar panels at a community building in Millvale, Pa.
Craig Williams is still mining coal despite tough times for the business. “We’re one of the last industries around and hope to keep it that way,” he says in a breakroom at Consol Energy’s Harvey mine, south of Pittsburgh.
The father of two — speaking in his dusty work jacket and a hard hat with headlamp — says coal is the best way he’s able to support his family. He declines to give his salary, but nationally, coal miners average about $80,000 a year.
Posted in Elon Musk, solar power, space travel, sustainability
Congressman Charlie Crist on Elon Musk’s space efforts in Florida: “What Mr. Musk has been able to do [with SpaceX and solar energy] is nothing short of extraordinary.”
Drawing inspiration from the plant world, researchers have invented a new electrode that could boost our current solar energy storage by an astonishing 3,000 percent.
The technology is flexible and can be attached directly to solar cells — which means we could finally be one step closer to smartphones and laptops that draw their power from the Sun, and never run out.
A major problem with reliably using solar energy as a power source is finding an efficient way to store it for later use without leakage over time.
Unimaginable Radical Abundance:
Yesterday I took the time to read chapter 11 of Eric Drexler’s book Radical Abundance as to get a glimpse of what might be possible with Atomically Precise Manufacturing (APM). I highly recommend the book.
The potential of APM is truly unimaginable.
Try to imagine billion core processors, memory storage in the billions of gigabytes per cm2. Solar panels far exceeding todays best laboratory efficiencies. Batteries that are a billion times more energy dense. All this with a negligible impact on the environment.
