ephbit

7 ms·

1.
by ephbit 11mo ago
I am either under equipped with intelligence .. or your question is too confusing to be easily understood. If your intention is to get any kind of useful feedback on your message here .. I suggest you try to rephrase it or explain further w
2.
by ephbit 1y ago
Looks like you yourself are dangerously wrong here. You know which way we will not solve the problem? By failing to recognize technologies that are going to help solve the problem. It's the same with CCS. The "green" mantra o
3.
by ephbit 1y ago
The key feature of hydrogen as energy storage wouldn't necessarily be round trip efficiency but cost effectiveness (compared to batteries) of long-term storage over months. Think about transporting peaks of renewables electricity gener
4.
by ephbit 1y ago
> > Commonsense should tell you e- generated by H2 can't compete with CH4, because Ch4 is the feedstock & H2 is the product! > Didn't parse this statement, sorry. Can you rephrase? They might have meant something like
5.
Brain Medicine - The calamity of a plastic spoon in your brain (micro plastics)(genomicpress.kglmeridian.com)
2 points by ephbit 1y ago|0 comments
6.
by ephbit 2y ago
> ... bringing "energy resilience", a key policy buzzphrase. The word "buzzphrase" implies that you think energy resilience is not as relevant as the proponents want to make it seem. Correct? I've been thinking f
7.
by ephbit 2y ago
Any graph with a linear scale where the low numbers contain the most important information is meaningless if you include the huge outlier numbers. Whoever made this graph doesn't seem to know what they're even looking for.
8.
by ephbit 2y ago
> ... new technique by creating tiny liquid metal droplets containing copper and gallium ... as the catalyst to break apart the raw ingredients of nitrogen and hydrogen. > "Liquid metals allow us to move the chemical elements aro
9.
by ephbit 2y ago
Each post could be encrypted (before publishing) using a unique key (derived from the private key of the poster) and then signed with the private key (of the poster) before publishing. Then the poster could later choose to selectively publ
10.
by ephbit 2y ago
> .. don't know where you get the idea that eating 300g of meat is difficult. You're right, 300 g of meat isn't much of a challenge. The more appropriate comparison would be between 300 g of chips and an equal amount of ca
11.
by ephbit 2y ago
There's apparently scientific studies that show how animals as well as humans tend to continue eating until they've satisfied a mostly fixed daily need for protein, mostly regardless of _what kind_ of food they're eating. Now
12.
by ephbit 2y ago
Storing it in batteries works for short periods of up to maybe a few days. You don't think there will be seasonal mismatch between renewable generation and electricity demand? Because if there _is_ a seasonal mismatch, hydrogen will be
13.
GenBook RK3588 – Modular open-source ARM laptop with DIY expansion capabilities(crowdsupply.com)
9 points by ephbit 2y ago|8 comments
14.
by ephbit 2y ago
https://www.t-online.de/finanzen/boersen-news/id_100429438/d... > „Seit 2023 betreiben wir nun einen Bitcoin-Node und auch Bitcoin-Lightning-Nodes, und voller Stolz möchte ich ein kleines Geheimnis verrate
15.
by ephbit 2y ago
> .. has a compact hydrogen generator in its product portfolio, which can produce 20 g of hydrogen from 200 ml of purified water in around five-to-six hours. > .. that hydrogen is transferred to a 25-cm-tall (9.8-in) bottle-like conta
16.
by ephbit 2y ago
> .. by mining bitcoin you invest directly in money creation, that is, there's no hiring people, no new business creation, no research aimed at product development, therefore much less knowledge and by extension a lot less jobs. IMO
17.
by ephbit 2y ago
It says ~ 2 kWh/kg (kg of iron) according to [1]. Assuming you can just store it as piles of iron dust (somehow shielded from air/oxygen) and assuming a gross density of 5 t/m³ for iron dust you'd get a volumetric energy
18.
by ephbit 2y ago
> There are just way too many cheaper and more efficient storage methods for electricity like pumped hydro and battery storage. Pumped hydro is cheaper and more efficient. But AFAIK there isn't much potential for new capacity in are
19.
by ephbit 2y ago
Methane appears convenient at first glance, yes. Can be burnt in regular turbines, stoves, even some cars. But is it really the overall best way to store hydrogen? Methane has a rather high climate impact, compared to CO2. So if you're
20.
by ephbit 2y ago
Duh. > The challenges are immense. Hydrogen fuel is expensive — as much as four times more expensive than gasoline or diesel fuel. What a trash opening of an article about technology. Expensive, according to what measuring scale? By weig
21.
by ephbit 2y ago
Key passages: > In its analysis of different zero-emissions rail technologies, Caltrans found that hydrogen trains, powered by onboard fuel cells that convert hydrogen into electricity, had better range and shorter refueling times than
22.
by ephbit 3y ago
How is this satirical or dystopian? It baffles me, how people pretend like they're not responsible. Sure, Exxon has probably done lots of damage that could have been prevented through how they operate. But how can one be so childish to
23.
by ephbit 3y ago
> .. "no BTC, more energy storage and shifting existing production" .. The underlying claim to this statement is: more storage could easily be built because it is economically feasible. Which is - apparently - not the case. App
24.
by ephbit 3y ago
> Not if someone paid me to do it. That's the point. If there was money in hauling ACs around the US and running them on the cheapest electricity the local market could provide, we'd have exactly the same false economy. How is
25.
by ephbit 3y ago
The carbon fee would lower and possibly sometimes completely remove the incentive to mine Bitcoin on a grid that is coincidentally emitting CO2, when the current electricity generation mix has a large share of fossil generation. As
26.
by ephbit 3y ago
The heat might also be used in a direct air capture process to regenerate the adsorbent, realeasing the CO2.
27.
by ephbit 3y ago
> I don't like the direction the internet is going :\ Haven't read "The Internet Con" yet but apparently Cory Doctorow has some ideas what can be done about this direction. > We can – we must – dismantle the tech p
28.
by ephbit 3y ago
> They should focus on straight forward hydrogen combustion engines. Why would they? A combustion engine drive-train has an efficiency that's significantly lower than that of a fuel-cell EV drive-train. Combusting hydrogen in an ICE
29.
by ephbit 3y ago
> Unlike popular messaging apps Briar doesn’t rely on the Internet in order to keep working. Due to its peer-to-peer nature it can make use of various so-called “transports” to send messages even if the Internet connection is cut. Those
30.
by ephbit 3y ago
> Microbial electrolysis cell (MEC) is a significantly sustainable bio-electrochemical system for biological hydrogen production. MEC is also regarded as an environmentally friendly method for producing clean biohydrogen from a variety o

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