manfredo

46 ms·

391.
by manfredo 6y ago
> The correct figure to look at is wholesale price, which is often below $.03/kWh in US power markets, and lower at off peak times when one would make hydrogen. Again, the estimates shared in the study are made with the assumption
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by manfredo 6y ago
You seem to be under the impression that the cost of hydrogen storage comes almost exclusively from the cost of electricity used for electrolysis of water. This is not the case. Even if we assume zero electricity costs, th cost of storing h
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by manfredo 6y ago
Underground hydrogen storage had the same issue as kinetic storage: it's geographically limited. It's not just a matter of scaling it up, it's also matter to implementing it in places without empty salt mines handy. And as yo
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by manfredo 6y ago
Even if we assume that the production capacity will continuously increases at the predicted rate, think you missed the part where that was just the US's storage requirements. Global electricity consumption annually was 22.3 PWh in 2017
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by manfredo 6y ago
> Then how come that not a single country has yet developed a method for storing their nuclear waste safely and permanently? They have. Finland has built a disposal site: https://en.m.wikipedia.org/wiki/Onkalo_spent_
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by manfredo 6y ago
I think you missed the point: even for diurnal storage the scale required amounts to a decade's worth of global battery production just to create capacity equal to 1/4th of just the US's daily electricity usage.
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by manfredo 6y ago
Then what's the alternative? Kinetic storage is geographically limited. Th Sabatier process has end to end efficiency of ~30% not to mention it needs an external source of carbon dioxide. The remaining proposals are at the experimenta
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by manfredo 6y ago
The cost of storing waste is miniscule. Because there's so little of it. The entirety of the US's nuclear waste from electricity generation occupies a volume the footprint of a football field and 10 meters high [1]. The government
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by manfredo 6y ago
Seasonal fluctuations in energy production are more extreme in far northern and southern latitudes. Which just so happens to be where the majority of energy consumption is located. The amount of energy storage required even to just handle t
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by manfredo 6y ago
While this is on the right track, one would point out that these conversations wouldn't be public they would only be visible to government authorities. I think the due process argument is more compelling. Part of preventing abuses and
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by manfredo 6y ago
Can't they still accept paper checks? I think banks are obligated to honor them. Groups like the KKK and the Daily Stormer have managed to stay in business.
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by manfredo 6y ago
Can you link to Tufekci's research? I can only find the NYTimes op-ed. Furthermore it's worth nothing that other studies determined the opposite, YouTube disproportionately recommends left leaning content: https://arxiv
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by manfredo 6y ago
This is often claimed, but the data indicates the opposite: https://www.google.com/url?sa=t&source=web&rct=j&url=https:/...
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by manfredo 6y ago
What computer science means varies from school to school. At many University I only wrote proofs for 2 of my CS classes. The rest of my classes were spent writing code.
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by manfredo 6y ago
My first tech job wasn't event at a FAANG company and I made $110k right out of college. My next job was at a ~1,000 person startup and my salary was bumped up to over $160k. Maybe it's a Europe vs US thing but it's definitel
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by manfredo 6y ago
> Do you think they should also not police sexual content/paedophilic content? The latter is prohibited by law. The former is also prohibited by law unless Facebook disallows minors from using the platform. Furthermore, there's
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by manfredo 6y ago
The whole "ludonarrative dissonance" meme is getting real old. Games require an amount of suspension of disbelief. Why can Ezio run at full sprint and do insane acrobatics non-stop that would exhaust even most fit human? Because i
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by manfredo 6y ago
Back before computers were a thing in most people's homes, let alone pockets, police would plot on a map the crime reports of the past year and assign more patrols to areas with a high density of crime. Is this practice now banned? Be
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by manfredo 6y ago
I think you missed it the central point of the parent commenter. Take for instance, the fact that men commit the overwhelming majority of violent crime: * Is it sexist to conclude that someone is a violent criminal just because they're
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by manfredo 6y ago
I think it's an extreme stretch to say that Reddit has a monopoly. Or even Reddit + Facebook + YouTube. My response would be to tell people to rediscover personal websites, mailing lists, and IRC. I'd be more concerned if ISPs, DN
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by manfredo 6y ago
The problem is that "lawful content" includes things like explicit support for Nazism and the KKK (not 2020 "Trump is a Nazi" kind of allegations of Nazism, but actual Nazis). Even things like abstract calls for violence
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by manfredo 6y ago
Full message: > I’d like to share an update about our thinking around quarantined communities. > When we expanded our quarantine policy, we created an appeals process for sanctioned communities. One of the goals was to “force subscrib
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by manfredo 6y ago
Reddit admin message: > Your account has been suspended from for breaking the rules. Your account has been suspended for 3 day(s). >> You recently upvoted a post or comment that was determined to be against our policies. Abusive co
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by manfredo 6y ago
At least for fire emblem it was more about practicing basic math operations. You don't really learn anything in Kumon either. You just get better at math through practice. I think I didn't so much learn new things so much as I got
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by manfredo 6y ago
I think this post wasn't about dedicated educational games, but rather education they occured naturally through gaming. E.g. Kerbal space program teaching basics of aerospace. One of the most prominent examples I had in my childhood wa
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by manfredo 6y ago
Solar thermal plants [1] effectively already use this system. They heat a model salt container, which drives a heat engine. The molten salt remains hot enough enough to keep producing energy through the night. However this scheme requires b
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by manfredo 6y ago
I am not making any misrepresentation. Yes, you did not say that France is going to reduce their share of nuclear power generation to 0%, or even 50%. Their reduction plans are more modest than that. I understand this, contrary to your insi
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by manfredo 6y ago
> Maybe I should be more clear and say "Less than 50%". > So I'm confused because I'm reading your response as disagreeing what IS happening (decommissioning IS happening) and taking it to mean that ALL reactors ar
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by manfredo 6y ago
Things like kinetic storage are geographically limited. Most places with available hydroelectric storage already generate electricity from dams. Chemical storage in the form of natural gas produced by the Sabatier process is very inefficien
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by manfredo 6y ago
The graph displays 150 GW, with no duration specified. 4 hours of 150GW storage, or 600GWh of storage, is still only 5% of the nation's current daily electricity consumption. And that's probably going to be an even smaller share i

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