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Author Topic: Xenon arc bulbs used for hydrogen fuel production
Leo Enticknap
Film God

Posts: 6906
From: Loma Linda, CA
Registered: Jul 2000


 - posted 03-23-2017 08:26 PM      Profile for Leo Enticknap   Author's Homepage   Email Leo Enticknap   Send New Private Message       Edit/Delete Post 
quote: Daily Mail
German scientists switch on the 'world's largest artificial sun' in an attempt to create climate-friendly fuel

Scientists in Germany are flipping the switch on what's being described as 'the world's largest artificial sun'.

The giant honeycomb-like structure, known as the 'Synlight' experiment uses 149 large spotlights normally found in cinemas to simulate sunlight.

The group hope it will help shed light on new ways of making climate-friendly fuel.

They will focus the huge array of xenon short-arc lamps on a single 20-by-20 centimetre (8x8 inch) spot.

In doing so, scientists from the German Aerospace Centre, or DLR, will be able to produce the equivalent of 10,000 times the amount of solar radiation that would normally shine on the same sized surface.

'If you went in the room when it was switched on, you'd burn directly,' Professor Bernard Hoffschmidt, a research director at the DLR, where the experiment is housed in a protective radiation chamber, told the Guardian.

The experiment uses as much electricity in four hours as a four-person household would in a year.

The furnace-like conditions that this energy creates will reach temperatures of up to 3,000 degrees Celsius (5,432 Fahrenheit).

Sunlight is normally in short supply in Germany this time of year, and the German government is one of the world's biggest investors in renewable energy.

The scientists, based in Juelich, about 30 kilometres (19 miles) west of Cologne, will start experimenting with this dazzling array on Thursday.

They will try to find ways of tapping the enormous amount of energy that reaches Earth in the form of light from the sun.

One area of the team's research will focus on how to efficiently produce hydrogen, a first step toward making artificial fuel for airplanes.

'We'd need billions of tonnes of hydrogen if we wanted to drive aeroplanes and cars on CO2-free fuel,' said Professor Hoffschmidt.

'Climate change is speeding up so we need to speed up innovation.'

Hydrogen is considered a promising future source of fuel because it does give off carbon emissions and so does not contribute to global warming.

But hydrogen in its pure form does not exist naturally, and so must be split from water using huge amounts of energy.

The process pulls water's strong chemical bonds apart to give oxygen and hydrogen.

It is hoped that sunlight could provide a cheap source for this energy in future.

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I guess that if RGB laser and laser phosphor projection take off and kill the market for xenon arc bulbs in the movie industry, these guys should be able to keep Osram and Ushio in business!

I shudder to think of the input power needed, cost of maintaining the rectifiers, the cost of cooling that room, etc. etc. etc., though. Surely this rig must consume vastly more energy than it creates?

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Frank Angel
Film God

Posts: 5196
From: Brooklyn NY USA
Registered: Dec 1999


 - posted 03-25-2017 08:59 AM      Profile for Frank Angel   Author's Homepage   Email Frank Angel   Send New Private Message       Edit/Delete Post 
quote:
Hydrogen is considered a promising future source of fuel because it does give off carbon emissions and so does not contribute to global warming.
Surely he means that it DOESN'T give off carbon.

Then again, you can separate oxygen and hydrogen from water by electrical energy in the first place. Why use the energy to light xenon bulbs when you could use the electrical energy directly -- sunlight to solar cells = electrical energy to split water atoms to collect hydrogen? And of course oxygen collected would also be a valuable fuel.

Not for nuthin, but whoever figures out the way to become carbon-free with a cheap fuel alternative will become the next most powerful nation on the planet.

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