Scientists switch on the world’s largest artificial sun

Scientists from the German Aerospace Centre (DLR) have switched on world’s largest artificial sun &ndash a device developed to help shed light on new ways of making climate-friendly fuels.

The artificial sun is giant honeycomb-like set-up of 149 spotlights, officially known as Synlight.

It is located in Juelich. It uses xenon short-arc lamps normally found in cinemas to simulate natural sunlight.

Key Points

The aim of Synlight experiment is to develop an optimal setup for concentrating natural sunlight to power a reaction to produce hydrogen fuel.

Its goal is to eventually use actual sunlight rather than the artificial light produced using electricity which is costly and requires as much electricity in four hours as a four-person household would use in a year.

Using the array, scientists are seeking to produce the equivalent of 10,000 times the amount of solar radiation by focusing the entire array on a single 8×8 in spot (20*20cm).

When light from all the lamps is aligned to concentrate on a single spot, it can generate temperatures of around 3,500 degree Celsius i.e. temperature two to three times of a blast furnace.

Significance of this Experiment

Hydrogen is the most common element in the universe, but on earth it is relatively rare.

One way to manufacture hydrogen is to split water (H2O) into its two elemental components &ndash Hydrogen and oxygen, using electricity in electrolysis process.

Synlight experiment will bypass usage of electricity by tapping into the enormous amount of solar energy that reaches Earth from sun.

Hydrogen obtained from it will be used to be used in fuel cells, a clean source of energy that does not produce carbon emissions.

Current Affairs 27th March, 2017
Current Affairs Round Up Bullet Points, February, 2016