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Major breakthrough on nuclear fusion energy

bbc.co.uk

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Re: Major breakthrough on nuclear fusion energy

#6
> The experiments produced 59 megajoules of energy over five seconds (11 megawatts of power).

> This is more than double what was achieved in similar tests back in 1997.

> It's not a massive energy output - only enough to boil about 60 kettles' worth of water. But the significance is that it validates design choices that have been made for an even bigger fusion reactor now being constructed in France.

I thought this was interesting as 59 megajoules of energy or 11 megawatts of power seems more than you would need to boil 60 kettles' of water. In fact, it takes 4,184 joules to raise the temperature of 1kg of water by 1 degree. Or 313800 joules to raise 1kg of water by 75 degrees. That means JET could have boiled about 188 kg of water.

Re: Major breakthrough on nuclear fusion energy

#8
post #6

> The experiments produced 59 megajoules of energy over five seconds (11 megawatts of power). > This is more than double what was achieved in similar tests back in 1997. > It's not a massive energy output - only enough to boil about 60 kettles' worth of water. But the significance is that it validates design choices that have been made for an even bigger fusion reactor now being constructed in France. I thought this…

3L kettles I guess

Re: Major breakthrough on nuclear fusion energy

#9
post #6

> The experiments produced 59 megajoules of energy over five seconds (11 megawatts of power). > This is more than double what was achieved in similar tests back in 1997. > It's not a massive energy output - only enough to boil about 60 kettles' worth of water. But the significance is that it validates design choices that have been made for an even bigger fusion reactor now being constructed in France. I thought this…

Is it possible they subtracted the energy required to facilitate the reaction in the first place? So net energy was enough to boil 60 kettles worth of water?

Re: Major breakthrough on nuclear fusion energy

#10
post #6

> The experiments produced 59 megajoules of energy over five seconds (11 megawatts of power). > This is more than double what was achieved in similar tests back in 1997. > It's not a massive energy output - only enough to boil about 60 kettles' worth of water. But the significance is that it validates design choices that have been made for an even bigger fusion reactor now being constructed in France. I thought this…

> That means JET could have boiled about 188 kg of water.

> only enough to boil about 60 kettles' worth of water

Exactly, no one has 3l kettles, but it's the right ballpark. You could also run about 9k kettles for that 5 seconds but not boil them, and if you tried to run 60 kettles consuming all that power for 5 seconds you would have quite the fire...

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