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Category: sustainability – Page 691

Solar Impulse 2 completes world’s first solar-powered Atlantic flight

The flights take such a long time because Solar Impulse 2, as the name suggests, is completely powered by sunlight. The plane’s massive 72-metre wings (broader than a 747!) are covered in some 269.5 square metres of photovoltaic cells. During the day, the cells power four 14kW (17.4hp) electric motors and top-up four 41kWh lithium-ion batteries. During the evening, the motors are driven by the batteries. Max cruise speed when the sun is up is 49 knots (90km/h), and a rather languid 33 knots (60km/h) at night.

The solar cells don’t quite refill the batteries during the day, which means the plane can’t fly forever just yet. Max flight duration is somewhere around five to six days.

For power-saving reasons, the Solar Impulse 2 cockpit can only carry a single human, and is both unheated and unpressurised. The pilots do sleep while they’re up in the air, but usually just for 20 minutes at a time (the telemetry data for one flight showed 10 catnaps of 20 minutes over a 24-hour period). Now multiply those conditions by a continuous flight time of three or four days and you have some idea of the rigours that Piccard and Borschberg must go through.

Elon Musk Aims to Shore Up SolarCity by Having Tesla Buy It — By Michael J. de la Merced and Peter Eavis | The New York Times

” … Tesla Motors said on Tuesday that it had offered to buy SolarCity in an all-stock deal, one that could value the latter at as much as $2.8 billion. The aim, Mr. Musk argues, is to create a renewable-energy giant, collecting clean electricity and putting it to work propelling cars.”

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Using Enzymes to Enhance LEDs

Robert Dunleavy had just started his sophomore year at Lehigh University when he decided he wanted to take part in a research project. He sent an email to Bryan Berger, an assistant professor of chemical and biomolecular engineering, who invited Dunleavy to his lab.

Berger and his colleagues were conducting experiments on tiny semiconductor particles called quantum dots. The optical and electronic properties of QDs make them useful in lasers, light-emitting diodes (LEDs), medical imaging, solar cells, and other applications.

Dunleavy joined Berger’s group and began working with cadmium sulfide (CdS), one of the compounds from which QDs are fabricated. The group’s goal was to find a better way of producing CdS quantum dots, which are currently made with toxic chemicals in an expensive process that requires high pressure and temperature.

Startup creates renewable hydrogen energy out of sunlight and water

California startup HyperSolar and University of Iowa researchers have teamed up to make renewable energy in a way that draws inspiration from plants. Using water and sunlight, they are able to make renewable hydrogen energy. At the end of May, HyperSolar announced a “breakthrough” in efficiency, and the University of Iowa just renewed a year-long research agreement with the startup.

New Energy-Carrying Particles Help Advance Solar-Cell Development

Nice.

Scientists have designed new energy-carrying particles that improve the way electrons are transported and could be used to develop new types of solar cells and miniaturized optical circuitry.

The work of researchers at the University of California (UC) San Diego, MIT, and Harvard University has synthetically engineered particles called “topological plexcitons,” which can enhance a process known as exciton energy transfer, or EET.

It’s a problem scientists have been working on for years but it’s been tricky due to the short-ranged nature of EET, which is on the scale of only 10 nanometers, or 100 millionth of a meter, according to researchers. Moreover, the energy quickly dissipates as the excitons interact with different molecules.

Nick Bostrom: ‘We are like small children playing with a bomb’

Some truth to this if the engineering team and designers are not reflective of the broader world population. Good example, is the super race research of the Nazis and attempts to make it happen. Today, AI in the hands of a N. Korea for example could be bad for the world. However, the larger threat that I see with AI is still the hacking of AI, and stolen AI by criminals to use against society.

Sentient machines are a greater threat to human existence than climate change, according to the Oxford philosopher Nick Bostrom.

BAM launches robo printer

BAM has teamed up with Universe Architecture to launch a ‘robo printer’ that can create free-form buildings in stone and concrete.

The ‘building machine’ is described as the first to link free-form print technology to automotive industry robotics. It is designed to make free-form architecture possible, as well as enable the creation of complex ornamental exteriors.

In 2013, architect Janjaap Ruijssenaars of Universe Architecture had plans for the creation of a building without beginning or end, Landscape House, using a 3D printer. The 3D Builder machine entered service yesterday and is starting with the construction of a 1:4 scale version of Landscape House at FabCity, a temporary sustainability campus in Amsterdam.

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