A power-beaming experiment is scheduled to launch in 2024.
Space-based solar power won’t be just a sci-fi dream forever, if things go according to the U.S. Air Force’s plans.
There is no cheaper way to generate electricity today than with the sun. Power plants are currently under construction in sunny locations that will supply solar electricity for less than 2 cents per kilowatt hour. Solar cells available on the market based on crystalline silicon make this possible with efficiencies of up to 23 percent. Therefore they hold a global market share of around 95 percent. With even higher efficiencies of more than 26 percent, costs could fall further. An international working group led by photovoltaics researchers from Forschungszentrum Jülich now plan to reach this goal with a nanostructured, transparent material for the front of solar cells and a sophisticated design. The scientists report on their success of many years of research in the renowned scientific journal Nature Energy.
Silicon solar cells have been steadily improved over the past decades and have already reached a very high level of development. However, the disturbing effect of recombination still occurs after the absorption of sunlight and the photovoltaic generation of electrical charge carriers. In this process, negative and positive charge carriers that have already been generated combine and cancel each other out before they could be used for the flow of solar electricity. This effect can be countered by special materials that have a special property—passivation.
“Our nanostructured layers offer precisely this desired passivation,” says Malte Köhler, former Ph.D. student and first author from the Jülich Institute for Energy and Climate Research (IEK-5), who has since received his doctorate. In addition, the ultra-thin layers are transparent—so the incidence of light is hardly reduced—and exhibit high electrical conductivity.
https://www.youtube.com/watch?v=zu9GyiloolU
The waterless toilet was developed by Cranfield University.
The toilet was developed for use in countries that doesn’t have running water.
This toilet doesn’t smell which is a result of multiple actions that go on beneath the toilet once the lid is closed.
–A set of gears within the toilet are turned when the lid is closed, these gears rotate the basin where the fecal delight was deposited.
–The waste falls into a holding chamber where a swipe blade wipes the inside of the holding basin.
–The solids drop down to the bottom, and the liquid floats to the top.
–An archimedes screw carries the waste upwards where it gets rolled into pellets that drop into a combustor and are burned.
–The combustor on the toilet will be on all the time but will require an initial source of power to get it going. The team had an initial idea of attaching a hand crank or a bicycle to generate the power needed but recently scrapped that idea. A solar panel could be installed above the toilet but that wouldn’t be very cost effective. The team has other ideas they are still working through to solve this issue.
–The poop ash that is accumulated from the combustor needs to be removed once a week.
–The liquid floats through a set of pipes that are above the combustor.
–The liquid is heated and passed through a set of 4 membrane bundles that purifies the water.
–This purified water drips down to the bottom where it travels to and is stored in the front step of the toilet.
–This water while purified isn’t clean enough to drink but it can be used in the garden to grow plants as well as for cleaning.
–This waterless toilet needs to be serviced every 3 months, the 4 membranes need to be replaced to continue to purify the water.
–So now you have the full overview of this toilet what problems do you guys foresee with this invention?
–The only thing I’m going to say is that I’m sure the swipe blade will wipe most of the poop out of the holding basin, you know there’s gonna be some nasty skip marks in there.
In reality though places in the world where people have real struggles in life, a skip mark isn’t one of them.
Sources:
https://www.youtube.com/watch?v=jGPpXF7y9Rg.
http://www.sciencedirect.com/science/article/pii/S0196890416306628
NASA ’s Lucy spacecraft has successfully completed thermal vacuum testing of both solar panels, the final step in checking out these critical spacecraft components in preparation for launch this fall. Once the Lucy spacecraft’s solar panels are attached and fully extended, they could cover a five-story building.
Lucy, the 13th mission in NASA’s Discovery Program, requires these large solar panels as it will operate farther from the Sun than any previous solar-powered space mission. During its 12-year tour of the Trojan asteroids, the Lucy spacecraft will operate a record-breaking 530 million miles (853 million km) from the Sun, beyond the orbit of Jupiter.
# Just 5 days left to upload an abstract to the SRIC3 Call for Papers! ## We need you to lead the Space Renaissance!
Choose among the following symposia tracks, all of them concurring to a coherent strategy for Space Settlement, kicking off the Civilian Space Development before 2025: * The immense social benefits of expanding Civilization into Outer Space * Civilization risk mitigation: space as the main Knight, defending humanity against the ‘Apocalypse’ multi-crisis * Global collaboration, working with Agencies, Companies, Space Advocacy Associations, United Nations and Governments of Planet Earth to promote Civilian Space Development and the 18th UN SDG * Space Safety: protecting human life and health in space, space debris recovering and reuse, space weather, defense from asteroids * Policies to Enable Communities Beyond Earth: technologies, financing, & Common Law * Earth orbit industrial development * The Moon and Cislunar development * Space Based Solar Power, feeding the Civilian Space Development * Greening the Solar System * Mars, the Asteroids Belt and beyond * A conceptual timetable for the founding steps of Space Settlement * Living, Sport, Art and Culture in Space, a Scifi futurologist–presentist narration * Congress Thesis 1 — Status of civilization and perspective of expansion into outer space * Congress Thesis 2 — A strategy to develop the Space Renaissance, towards 2025.
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Excess solar power will be converted to H2, which will be stored in a solid material called sodium borohydride, before being run through a fuel cell to generate electricity at Australian project.
Crystalline silicon (c-Si) solar cells are among the most promising solar technologies on the market. These solar cells have numerous advantageous properties, including a nearly optimum bandgap, high efficiency and stability. Notably, they can also be fabricated using raw materials that are widely available and easy to attain.
In recent years, many companies and engineers specifically focused their research efforts on Si heterojunction (SHJ) solar cells. These solar cells, which consist of amorphous silicon layers deposited on crystalline silicon surfaces, have been found to achieve remarkable power conversion efficiencies (PCE).
Researchers at Beijing University of Technology, the Hanergy Chengdu Research and Development Center, and Jiangsu University in China recently carried out a study aimed at closely examining the structure of the c-Si/a-Si:H interface in high-efficiency SHJ solar cells. Their paper, published in Nature Energy, offers valuable insight that could help to improve the performance of SHJ solar cells further, by allowing engineers greater control over the c-Si/a-Si:H interface.
https://youtube.com/watch?v=m3Hm0PGQb0I
On March 28, 2021 NASA’s Mars Helicopter Ingenuity took vertical position (upright) under Perseverance Rover at Helipad. Helicopter release system unlocked yesterday. Today ingenuity made one more step to be deployed from Perseverance. As for now, NASA’s rover prepares to unlock Helicopter’s landing legs and put it on the Mars’s surface. Flight scheme is known. Solar panel charges Lithium-ion batteries, providing enough energy for one 90-second flight per Martian day (~350 Watts of average power during flight). Atmospheric weather relates to conditions such as air density at flight time, which affects the thrust that can be produced by the rotor and could result in adjustments of flight parameters. Temperature and wind profiles during the day are used to estimate the energy required to operate heaters. Winds at the time of the flight are tied to risks associated with takeoff, landing, and flying in high winds or very gusty conditions. All the things that a pilot on Earth would care about too!
Credit: nasa.gov, NASA/JPL-Caltech, NASA/JPL-Caltech/ASU
Continue reading “Mars Helicopter Ingenuity takes vertical position under Perseverance Rover” »
3% of sunlight reaches Earth, while satellites in space could gather energy for 99% of the year.
Capturing the sun’s boundless light in space could revolutionize how we distribute energy around the world.
From microwave ovens to Wi-Fi connections, the radio waves that permeate the environment are not just signals of energy consumed but are also sources of energy themselves. An international team of researchers, led by Huanyu “Larry” Cheng, Dorothy Quiggle Career Development Professor in the Penn State Department of Engineering Science and Mechanics, has developed a way to harvest energy from radio waves to power wearable devices.
The researchers recently published their method in Materials Today Physics.
According to Cheng, current energy sources for wearable health-monitoring devices have their place in powering sensor devices, but each has its setbacks. Solar power, for example, can only harvest energy when exposed to the sun. A self-powered triboelectric device can only harvest energy when the body is in motion.
