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[2024-02-24 00:36:50] <Lucifer_arma> the best use of hydrogen is still in fuel cells.  Heat engines max out at around 40% efficiency.  With fuel cells and electric motors, we can hit 90% efficiency.
[2024-02-24 00:36:50] <armagetronbridge> 10irc:Lucifer_arma| the best use of hydrogen is still in fuel cells.  Heat engines max out at around 40% efficiency.  With fuel cells and electric motors, we can hit 90% efficiency.
[2024-02-24 00:37:32] <Lucifer_arma> But at that point, why not batteries?  We will reach a point where charging a battery EV will take the same amount of time as filling up an ICE car, whether it's through fast charging technology or battery swapping
[2024-02-24 00:37:33] <armagetronbridge> 10irc:Lucifer_arma| But at that point, why not batteries?  We will reach a point where charging a battery EV will take the same amount of time as filling up an ICE car, whether it's through fast charging technology or battery swapping
[2024-02-24 00:40:31] <Lucifer_arma> well, fixing my star trek video was the right thing to do.  I've picked up five more subscribers and it's my most successful video now
[2024-02-24 00:40:31] <armagetronbridge> 10irc:Lucifer_arma| well, fixing my star trek video was the right thing to do.  I've picked up five more subscribers and it's my most successful video now
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[2024-02-24 06:12:35] <armagetronbridge> 05discord:juesto| congrats lucifer_arma
[2024-02-24 06:12:36] <armagetron-bridge> 05discord:juesto| congrats lucifer_arma
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[2024-02-24 08:44:08] <armagetronbridge> 12discord:zman_0| Lucifer_arma: @northernscrub That German Lady most probably was Sabine Hossenfelder, she has a quite good science channel on Youtube.
[2024-02-24 08:44:09] <armagetron-bridge> 12discord:zman_0| Lucifer_arma: @northernscrub That German Lady most probably was Sabine Hossenfelder, she has a quite good science channel on Youtube.
[2024-02-24 08:44:09] <armagetron-bridge> 12discord:zman_0| The original Alcubierre drive paper was a reverse engineered solution to general relativity. GR usially has the matter distribution given and asks us to derive the spacetime curvature from that. For the Alcubierre drive, he went the other way; he slapped together a spacetime curvature that would contain timelike curves (that are trajectories normal matter can move on) that move f <clipped message>
[2024-02-24 08:44:09] <armagetronbridge> 12discord:zman_0| The original Alcubierre drive paper was a reverse engineered solution to general relativity. GR usially has the matter distribution given and asks us to derive the spacetime curvature from that. For the Alcubierre drive, he went the other way; he slapped together a spacetime curvature that would contain timelike curves (that are trajectories normal matter can move on) that move f <clipped message>
[2024-02-24 08:44:10] <armagetron-bridge> 12discord:zman_0| aster than light globally. It's quite easy to do! And then he calculated the matter distribution, which turned out to be solvable, just with negative energy densities, which we do not know how to make. Another difficulty NOBODY is talking about is that the bit where you have the negative energy density, in front of your starship, the bit that 'compresses' spacetime, there are no  <clipped message>
[2024-02-24 08:44:11] <armagetronbridge> 12discord:zman_0| aster than light globally. It's quite easy to do! And then he calculated the matter distribution, which turned out to be solvable, just with negative energy densities, which we do not know how to make. Another difficulty NOBODY is talking about is that the bit where you have the negative energy density, in front of your starship, the bit that 'compresses' spacetime, there are no  <clipped message>
[2024-02-24 08:44:12] <armagetron-bridge> 12discord:zman_0| timelike or lightlike curves from your starship to it. That means there are no conventional means your starship can control those bits of hypothetical negative energy substance. So on top of the impossible substance, you also need to set up the whole thing in advance for your hole trip; the impossible stuff needs to do what it does for as long as your journey lasts, then dissolve <clipped message>
[2024-02-24 08:44:12] <armagetronbridge> 12discord:zman_0| timelike or lightlike curves from your starship to it. That means there are no conventional means your starship can control those bits of hypothetical negative energy substance. So on top of the impossible substance, you also need to set up the whole thing in advance for your hole trip; the impossible stuff needs to do what it does for as long as your journey lasts, then dissolve <clipped message>
[2024-02-24 08:44:13] <armagetron-bridge> 12discord:zman_0| . Or I suppose you can just put it into a stable configuration where it goes on forever and let your starship drop out of the side or out the back of the warp bubble. Just don't aim your drive at anywhere people actually live, then. See S5E10 of TNG, "New Ground". Anyway, preparing the impossible matter in that way may turn out to be another layer of impossible. Or super easy, on <clipped message>
[2024-02-24 08:44:13] <armagetronbridge> 12discord:zman_0| . Or I suppose you can just put it into a stable configuration where it goes on forever and let your starship drop out of the side or out the back of the warp bubble. Just don't aim your drive at anywhere people actually live, then. See S5E10 of TNG, "New Ground". Anyway, preparing the impossible matter in that way may turn out to be another layer of impossible. Or super easy, on <clipped message>
[2024-02-24 08:44:14] <armagetron-bridge> 12discord:zman_0| ce you get the first impossibility out of the way.
[2024-02-24 08:44:14] <armagetronbridge> 12discord:zman_0| ce you get the first impossibility out of the way.
[2024-02-24 08:49:40] <armagetronbridge> 12discord:zman_0| For example, you know how black holes are not actually any matter any more, just frozen spacetime curvature, if you look at them right? Well, if the stuff in front of the alcubierre drive were something similar, it would not even need to be any kind of new matter. Just gravity frozen in a different way. A naked singularity of the right kind might do the trick. That might even be  <clipped message>
[2024-02-24 08:49:40] <armagetron-bridge> 12discord:zman_0| For example, you know how black holes are not actually any matter any more, just frozen spacetime curvature, if you look at them right? Well, if the stuff in front of the alcubierre drive were something similar, it would not even need to be any kind of new matter. Just gravity frozen in a different way. A naked singularity of the right kind might do the trick. That might even be  <clipped message>
[2024-02-24 08:49:41] <armagetron-bridge> 12discord:zman_0| stable and require no fine tuning.
[2024-02-24 08:49:41] <armagetronbridge> 12discord:zman_0| stable and require no fine tuning.
[2024-02-24 08:49:42] <armagetron-bridge> 12discord:zman_0| Of course, we have so little idea about how one would make a naked singularity that there are conjectures that it is fundamentally impossible. (Math speak: Conjecture = something we believe is a strong candidate for a theorem, but we're not able to prove it. In this case, in the framework of GR, which we basically know must be incomplete because it does not combine well with quan <clipped message>
[2024-02-24 08:49:42] <armagetronbridge> 12discord:zman_0| Of course, we have so little idea about how one would make a naked singularity that there are conjectures that it is fundamentally impossible. (Math speak: Conjecture = something we believe is a strong candidate for a theorem, but we're not able to prove it. In this case, in the framework of GR, which we basically know must be incomplete because it does not combine well with quan <clipped message>
[2024-02-24 08:49:43] <armagetron-bridge> 12discord:zman_0| tum theory, further reducing the value of GR conjectures)
[2024-02-24 08:49:43] <armagetronbridge> 12discord:zman_0| tum theory, further reducing the value of GR conjectures)
[2024-02-24 08:51:57] <armagetronbridge> 12discord:zman_0| Also sometimes: Conjecture = Stuff we hope is true, because otherwise our lives would be miserable. The 'no naked singularities' thing is more of that kind, because naked singularities are generally believed to be bad news and you don't want them around.
[2024-02-24 08:51:57] <armagetron-bridge> 12discord:zman_0| Also sometimes: Conjecture = Stuff we hope is true, because otherwise our lives would be miserable. The 'no naked singularities' thing is more of that kind, because naked singularities are generally believed to be bad news and you don't want them around.
[2024-02-24 11:13:35] <armagetronbridge> 08discord:delinquent| Sabine Hossenfelder sounds about right, to be honest. 
[2024-02-24 11:13:36] <armagetron-bridge> 08discord:delinquent| Sabine Hossenfelder sounds about right, to be honest. 
[2024-02-24 11:13:36] <armagetron-bridge> 08discord:delinquent| Re: Why not batteries, motors, etc etc. A huge part of that is because driving is, for me personally, an *experience*. That experience includes the noise of a combustion engine, and I'm not alone in that by a long shot. As human beings, we are somewhat inclined toward control of machines that make noise, or otherwise appear to be more powerful than we are. It's the reason we like <clipped message>
[2024-02-24 11:13:37] <armagetronbridge> 08discord:delinquent| Re: Why not batteries, motors, etc etc. A huge part of that is because driving is, for me personally, an *experience*. That experience includes the noise of a combustion engine, and I'm not alone in that by a long shot. As human beings, we are somewhat inclined toward control of machines that make noise, or otherwise appear to be more powerful than we are. It's the reason we like <clipped message>
[2024-02-24 11:13:38] <armagetron-bridge> 08discord:delinquent|  trains, ships, lorries, etcetera. Motors simply don't have that same appeal, which is why it is difficult to get people to move to less polluting forms of transportation en-masse. 
[2024-02-24 11:13:38] <armagetronbridge> 08discord:delinquent|  trains, ships, lorries, etcetera. Motors simply don't have that same appeal, which is why it is difficult to get people to move to less polluting forms of transportation en-masse. 
[2024-02-24 11:13:39] <armagetron-bridge> 08discord:delinquent| An engine that runs on a fuel that doesn't pollute is, thus, an engine that will be wildly popular - and rather than waiting twenty or thirty years for people to move away from petroleum, we could get the vast majority of people moved over within five or ten years. Less, if we enacted a program that converted traditional petrol engines to run on the new fuel. It's hardly a magica <clipped message>
[2024-02-24 11:13:39] <armagetronbridge> 08discord:delinquent| An engine that runs on a fuel that doesn't pollute is, thus, an engine that will be wildly popular - and rather than waiting twenty or thirty years for people to move away from petroleum, we could get the vast majority of people moved over within five or ten years. Less, if we enacted a program that converted traditional petrol engines to run on the new fuel. It's hardly a magica <clipped message>
[2024-02-24 11:13:40] <armagetron-bridge> 08discord:delinquent| l instant solution - the economy of scale needs to happen to make water-sourced hydrogen affordable in the first place, or the process needs to be subsidised for a time, but the issue of consumer desire would be rapidly reduced to nothing.
[2024-02-24 11:13:41] <armagetronbridge> 08discord:delinquent| l instant solution - the economy of scale needs to happen to make water-sourced hydrogen affordable in the first place, or the process needs to be subsidised for a time, but the issue of consumer desire would be rapidly reduced to nothing.
[2024-02-24 22:39:25] <Lucifer_arma> ah, but battery EVs have been in sporadic development for over a hundred years, with a huge focus over the last 10 years.  The only alternate fuel solutions that have been pursued have only gotten as far as proof of concept
[2024-02-24 22:39:26] <armagetronbridge> 10irc:Lucifer_arma| ah, but battery EVs have been in sporadic development for over a hundred years, with a huge focus over the last 10 years.  The only alternate fuel solutions that have been pursued have only gotten as far as proof of concept
[2024-02-24 22:40:26] <Lucifer_arma> and EVs are superior technology to ICEs.  Literally, the only drawback by comparison is the lack of engine noise.  Otherwise, they're faster, require a whole lot less maintenance, and have few moving parts
[2024-02-24 22:40:26] <armagetronbridge> 10irc:Lucifer_arma| and EVs are superior technology to ICEs.  Literally, the only drawback by comparison is the lack of engine noise.  Otherwise, they're faster, require a whole lot less maintenance, and have few moving parts
[2024-02-24 22:40:42] <Lucifer_arma> meaning they will ultimately be hugely more reliable than ICEs.
[2024-02-24 22:40:43] <armagetronbridge> 10irc:Lucifer_arma| meaning they will ultimately be hugely more reliable than ICEs.
[2024-02-24 22:41:06] <Lucifer_arma> This isn't the Itanium repeating itself, it's more like the Opteron
[2024-02-24 22:41:07] <armagetronbridge> 10irc:Lucifer_arma| This isn't the Itanium repeating itself, it's more like the Opteron
[2024-02-24 22:42:03] <Lucifer_arma> As it stands right now, all we need to do, theoretically, to switch to an alternate fuel is reprogram that ECM in a car.  But that doesn't even begin to address what has to happen.
[2024-02-24 22:42:04] <armagetronbridge> 10irc:Lucifer_arma| As it stands right now, all we need to do, theoretically, to switch to an alternate fuel is reprogram that ECM in a car.  But that doesn't even begin to address what has to happen.
[2024-02-24 22:42:47] <Lucifer_arma> There is always blowby gases, so you need oils specially formulated to last even when the fuel gets mixed into it.  You need seals compatible with the fuel.  Fuel lines, hoses, and all those seals.  Fuel injectors.
[2024-02-24 22:42:48] <armagetronbridge> 10irc:Lucifer_arma| There is always blowby gases, so you need oils specially formulated to last even when the fuel gets mixed into it.  You need seals compatible with the fuel.  Fuel lines, hoses, and all those seals.  Fuel injectors.
[2024-02-24 22:43:54] <Lucifer_arma> just look at the attempts to switch to biodiesel.  You have to change every seal and hose in the fuel system.  Same with just using vegetable oil.  I mean, right now, you could get a diesel car and not have to change everything, because manufacturers changed it all for you like 10-20 years ago
[2024-02-24 22:43:54] <armagetronbridge> 10irc:Lucifer_arma| just look at the attempts to switch to biodiesel.  You have to change every seal and hose in the fuel system.  Same with just using vegetable oil.  I mean, right now, you could get a diesel car and not have to change everything, because manufacturers changed it all for you like 10-20 years ago
[2024-02-24 22:44:30] <Lucifer_arma> but if you had this car, you could go to restaurants and see about buying their used oil, process it yourself, and then fuel your car with it, and now you have something that's carbon neutral
[2024-02-24 22:44:30] <armagetronbridge> 10irc:Lucifer_arma| but if you had this car, you could go to restaurants and see about buying their used oil, process it yourself, and then fuel your car with it, and now you have something that's carbon neutral
[2024-02-24 22:45:03] <Lucifer_arma> this is stable technology right now.  But there isn't enough arable land in the world to fuel a worldwide fleet of diesel vehicles
[2024-02-24 22:45:03] <armagetronbridge> 10irc:Lucifer_arma| this is stable technology right now.  But there isn't enough arable land in the world to fuel a worldwide fleet of diesel vehicles
[2024-02-24 22:45:59] <Lucifer_arma> we're at minimum 10-20 years away from a production alternate fuel engine, and another 10-20 years away from having it be reliable, to say nothing of what it takes to scale up fuel production for whatever fuel it winds up being
[2024-02-24 22:46:01] <armagetronbridge> 10irc:Lucifer_arma| we're at minimum 10-20 years away from a production alternate fuel engine, and another 10-20 years away from having it be reliable, to say nothing of what it takes to scale up fuel production for whatever fuel it winds up being
[2024-02-24 22:46:15] <Lucifer_arma> EVs are here now, and they're getting more reliable and faster charging with every new production model
[2024-02-24 22:46:15] <armagetronbridge> 10irc:Lucifer_arma| EVs are here now, and they're getting more reliable and faster charging with every new production model
[2024-02-24 22:48:41] <Lucifer_arma> the charging infrastructure is going up, and it really looks like someone is going to crack the solid state battery soon, which will double energy density.  If it takes 15 minutes to charge, but you can drive 500 miles between charges, people will accept that math
[2024-02-24 22:48:41] <armagetronbridge> 10irc:Lucifer_arma| the charging infrastructure is going up, and it really looks like someone is going to crack the solid state battery soon, which will double energy density.  If it takes 15 minutes to charge, but you can drive 500 miles between charges, people will accept that math
[2024-02-24 22:54:36] <Lucifer_arma> we've reached a tipping point on solar where it's now cheaper to build and produce solar energy than it is LNG, and it stays cheaper when you factor out subsidies (for both, people don't realize how much the US government subsidizes fossil fuels)
[2024-02-24 22:54:36] <armagetronbridge> 10irc:Lucifer_arma| we've reached a tipping point on solar where it's now cheaper to build and produce solar energy than it is LNG, and it stays cheaper when you factor out subsidies (for both, people don't realize how much the US government subsidizes fossil fuels)
[2024-02-24 22:55:34] <Lucifer_arma> utility scale battery plants are dropping in price, too, and in the next couple of years, those will be cheaper than LNG, if they're not already
[2024-02-24 22:55:34] <armagetronbridge> 10irc:Lucifer_arma| utility scale battery plants are dropping in price, too, and in the next couple of years, those will be cheaper than LNG, if they're not already
[2024-02-24 22:56:26] <Lucifer_arma> and there's new battery chemistries ramping up battery production (sulfur and carbon, not as energy dense as lithium, but much more stable and quick to charge, perfect for utility scale batteries)
[2024-02-24 22:56:26] <armagetronbridge> 10irc:Lucifer_arma| and there's new battery chemistries ramping up battery production (sulfur and carbon, not as energy dense as lithium, but much more stable and quick to charge, perfect for utility scale batteries)
[2024-02-24 22:57:40] <Lucifer_arma> LNG and gasoline have enjoyed a symbiotic relationship for some time because they ultimately come from the same source.  EVs and solar power enjoy the same kind of symbiosis.  THere's at least one company that's buying up used EV battery packs and converting them to utility scale batteries
[2024-02-24 22:57:40] <armagetronbridge> 10irc:Lucifer_arma| LNG and gasoline have enjoyed a symbiotic relationship for some time because they ultimately come from the same source.  EVs and solar power enjoy the same kind of symbiosis.  THere's at least one company that's buying up used EV battery packs and converting them to utility scale batteries
[2024-02-24 22:58:23] <Lucifer_arma> they can product current at a lower rate than EVs require for another 20 years, theoretically, so before we even need to recycle them into new batteries, they'll have first served 10 years in a vehicle and 20 years on the power grid
[2024-02-24 22:58:24] <armagetronbridge> 10irc:Lucifer_arma| they can product current at a lower rate than EVs require for another 20 years, theoretically, so before we even need to recycle them into new batteries, they'll have first served 10 years in a vehicle and 20 years on the power grid
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