News on China's scientific and technological development.

tacoburger

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Because it's so far away from being meaningful. By the time this is viable, china will be fully covered with solar and wind
One big big application of thorium and other molten salt/liquid metal nuclear reactors is it's use in ships/submarines, since it's not pressurized and doesn't need the ridiculously high strength and high mass pressure vessels. Sodium cooled reactors have been tested before but they have the issue of exploding in contact with water, so molten salt reactors could be the future power source of various naval ships/submarines in the future, as compared to the current dominance of PWRs.
 

tphuang

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That reactor has been built already. They said it would take 6 years, they did in in 3. They are about to turn it on.
And how long will it take them to scale it up to 40gw?
 
D

Deleted member 24525

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And how long will it take them to scale it up to 40gw?
A while. Like you said, the 2020s are likely to be the decade of explosive renewable expansion in China. Nuclear is likely to take a comparatively small roll during this period. But once a sufficiently large portion of generation is done by renewables, there is going to be a massive need for zero-carbon flexible and base-load power sources if China's total electrical consumption is to keep growing. And it is not going to be cost effective to solve this problem by hugely overbuilding renewable and ESS capacity. So then it will be nuclear's time to shine, and by then this technology will be more mature.
 

tphuang

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A while. Like you said, the 2020s are likely to be the decade of explosive renewable expansion in China. Nuclear is likely to take a comparatively small roll during this period. But once a sufficiently large portion of generation is done by renewables, there is going to be a massive need for zero-carbon flexible and base-load power sources if China's total electrical consumption is to keep growing. And it is not going to be cost effective to solve this problem by hugely overbuilding renewable and ESS capacity. So then it will be nuclear's time to shine, and by then this technology will be more mature.

You are forgetting the other stuff I said. The current build out of 3rd gen nuclear reactors will get to well over 100GW before anything 4th gen can be mass produced at same scale. On top of that, green hydrogen production for surplus renewable power will be well on its way for commercial electricity generation by the middle of next decade.

The question was why isn't there more excitement about molten salt reactors and this is why. China might not need it. We will have to see how things look in 10 years.
 

gelgoog

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Oh really? With what alkaline electrolyzers that are like 50-70% efficient? And then you actually have to store the hydrogen.
Electricity is much too valuable to waste like that.
 

tphuang

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Oh really? With what alkaline electrolyzers that are like 50-70% efficient? And then you actually have to store the hydrogen.
Electricity is much too valuable to waste like that.
The best alkaline electrolyzer right now by MIngyang uses 3.8 kwh/nm3.
Each nm3 is about 3.0 kwh in energy

so efficiency is already around 79%

With Soec electrolyzer, this will get to probably 95% or higher. In 10 years, efficiency of electrolyzers should continue to improve

My calculation is that if levelized electricity cost is 0.15 RMB/NM3, then hydrogen can be produced at 10.64RMB/KG

1687294837956.png

so simple calculation of LNG vs H2 assuming
LNG priced at 4500RMB/T -> 4.5 RMB/kg
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And then efficiency, I have 62% as best possible NG efficiency using combined cycle gas turbines
The best theoretically efficiency for H2 in energy generation is 75 to 85%

Since FTXT has already shown 68% efficiency in fuel cell motor I think 70% efficiency in H2 plant should be possible in a few years.

btw, I still have H2 as more costly of an energy generation than coal

But in both of the case of LNG & coal, I'm not factoring in pollution/carbon costs
 

sunnymaxi

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The world's first intelligent coal shearer with a super large mining height of 10 meters made a shocking debut! A few days ago, Xi'an Coal Mining Machinery Co., Ltd. officially released a 10-meter super large mining height intelligent shearer independently developed and with independent intellectual property rights. The project broke through a number of "stuck neck" technical problems, achieved a major breakthrough in the core technology of ultra-large mining height coal mining equipment, and filled the gap in the country and even the world's ultra-thick coal seam with a full height of 10 meters at one time..

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