Page 523 - Efficiency News Today

So, silicon is a semiconductor. thats the material thats used to absorb sunlight and generate electricity in a solar cell. it works by absorbing sunlight, particles of sunlight, that we call photons, they carry energy, theyre absorbed in the silicon and what they do is give electrons in that silicon extra kinetic energy, the energy from the photons transferred to the electrons, and those electrons, with that energy, can move around and theyre freed from the lattice — theyre freed from being bo...

It is a monster of a machine, this thing. and i want you to describe for me its scale and efficiency, and how you get it to work. so, the haliade—x is the worlds most powerful wind turbine in operation today. its offshore, it has a 14—megawatt capacity, and the rotor — so, the distance from blade tip to blade tip — is 220 metres. so each blade is longer than the wingspan of the largest aircraft in the world. each spin of one of those blades can power a typical household for more than two...

Double the efficiency of solar power and halve the cost. danielle merfeld is an electrical engineer who is chief technology officer and vice—president of ge renewables. ge is the biggest creator of wind turbines worldwide, and she and her team currently have over 40,000 wind turbines out in the field. shesjoining us by video link from north carolina, usa. kristian eikeland holmefjord is here from norway after braving 10 days�* quarantine on arrival in the uk. kristian is at the forefront of ...

And we let the silicon absorb all the infrared. and in doing that we actually fundamentally improve the efficiencies. if we made a perfect perovskite on silicon tandem cell, that would top out at about 45%. so weve fundamentally lifted the ceiling. and if we went one step further to anotherjunction, triple junction, three junctions, that would top out at just above 50%. so what perovskite does is lift the ceiling for potential efficiency and gives us a new path forward to go to higher and higher...

Now, in terms of the limitations, if we look at the optimum efficiency a single solar absorbent material could be, like silicon, they top out at about 25%. thats really the practical limit for an actual solar panel with todays silicon technology. so, im hearing 6%, 7%, 8% from danielle. im hearing 20% from you. were not quite at that 85%. and all of this energy we generate needs storing, doesnt it? so, kristian, i know that youre a man of the fjords and boats and ships have been a constant threa...

Please welcome henry snaith. hes professor of physics at oxford, and through his engineering of low—cost photovoltaics, henry discovered a thin film of solar cells made of perovskite. it could be a hugely significant discovery, as henry hopes it will eventually double the efficiency of solar power and halve the cost. danielle merfeld is an electrical engineer who is chief technology officer and vice—president of ge renewables. ge is the biggest creator of wind turbines worldwide, and she and...

Cells on top of each other we call multi—junctions, and the simplest multi—junction is a tandem cell, two solar cells on top of each other. and the perovskite we tune to match perfectly silicon. it absorbs only the visible light and we let the silicon absorb all the infrared. and in doing that we actually fundamentally improve the efficiencies. if we made a perfect perovskite on silicon tandem cell, that would top out at about 45%. so weve fundamentally lifted the ceiling. and if we went one...

Both the batteries and the fuel and fuel cells together. thank you. now, danielle, i want to come back to you to hear about your latest prototype wind turbine, the haliade—x, unveiled in 2019. it is a monster of a machine, this thing. and i want you to describe for me its scale and efficiency, and how you get it to work. so, the haliade—x is the worlds most powerful wind turbine in operation today. its offshore, it has a 14—megawatt capacity, and the rotor — so, the distance from blade t...

And through of his engineering of low—cost photovoltaics, he discovered a thin film of photocells. it could be a hugely significant discovery, as henry hopes it will eventually double the efficiency of solar power and halve the cost. danielle merfeld is an electrical engineer who is chief technology officer and vice—president of ge renewables. ge is the biggest creator of wind turbines worldwide, and she and her team currently have over 40,000 wind turbines out in the field. shesjoining us b...

Off the energy from wind - or solar, and then you employ| both the batteries and the fuel and fuel cells together. thank you. now, danielle, i want to come back to you to hear about your latest prototype wind turbine, the haliade—x, unveiled in 2019. it is a monster of a machine, this thing. and i want you to describe for me its scale and efficiency, and how you get it to work. so, the haliade—x is the worlds most powerful wind turbine in operation today. its offshore, it has a 14—megawatt...