5 ms·
> You really think the only change in our usage in that time period is we left the lights on 60% longer? Of course not. This was just an example to attempt to
by robomartin 5y ago
> You really think the only change in our usage in that time period is we left the lights on 60% longer?
Of course not. This was just an example to attempt to drive the point that there's a very real difference between energy and power. You can deliver more kilowatt-hours (energy) without changing kilowatt (power) generation capacity. The bottom line is that energy metrics or charts are impossible to use in this discussion.
> your argument of leaving the lights on longer and power capacity points to how EVs are still possible
In small numbers, sure. At scale, 300 million vehicles. No. Nobody is going to wait 16 hours to charge their cars. The infrastructure has to be able to deliver double the power we can deliver today.
I read through your reasoning about the 50 A circuit at one or many homes. The problem with this reasoning or story is that, while it is easy to say these things, until you sit down with Excel and quantify it all with a reasonable model of reality, it is just words. Once you do that you will very quickly realize a full migration to electrics is absolutely impossible with the current power generation and distribution infrastructure.
As I said before, I wanted to understand this in some detail. I kept hearing these claims about going electric, yet nobody showed any calculations. As an engineer, I had to put numbers to the claims.
The model I created about five years ago simulated a fleet consisting of 300 million vehicles of various types. This being US-centric, I divided the fleet into six time zones based on current population distribution figures. And, within those time zones, I created variables to manipulate utilization scenarios. For example, a percentage of the population would only drive 20 miles a day and would be happy slow charging over eight hours. Another portion of the population required fast charging a few times per week (pretty much as one might get gasoline today). Some would be hybrid: plug in at home every night and top-off with fast chargers during the week as needed. Yet another part of the model looked at some percentage of those vehicles being mid and long distance trucks, which simply cannot afford to sit idle for eight or more hours while charging. Etc.
The point is, the model wasn't a simplistic statement of the kind that is often offered in these discussions, things like "We have more than enough solar to do this" while nobody bothers to put some numbers to it.
Having said all of that. The best confirmation of my numbers I can offer is Elon Musk himself explaining in that video that we need to double our power generation capacity and redo our entire infrastructure. Until Elon was asked this question I was, to be dramatic, entirely on my own making these kinds of claims. People want to religiously believe that these things are possible. They are not. So, don't believe what I say, but, please, do believe what Elon Musk said --which happens to confirm my findings from many years ago.
Assuming both Elon and I are not completely full of shit, well, reality is that the fully-electric transportation dream will require leaving this cult-like delusion behind to put into place a realistically attainable plan. This plan requires --absolutely requires-- cheap oil. Oil is what we have to use to build the very infrastructure required to support electric transportation. Without cheap oil we cannot get there. That is VERY important to understand. Without an admission and an understanding that petroleum is critical in making the all-electric dream a reality, there is no way to make it happen.
And so, the plan must include a well-defined and intensely funded period, about 50 years long, where we drive local petroleum costs as far down as possible in order to be able to engage in a massive construction project to revamp power generation capacity. This plan should also include a vey serious commitment and a solid plan to build hundreds of nuclear power plants. We cannot do it without nuclear. And, yes, solar and wind must be a part of this.
The precise proportions and sequencing of the above will be a matter of detailed analysis and, yes, math. None of this is particularly difficult --outside of the politics and ideological delusions we must leave behind. It's just a matter of starting to bring the truth to the forefront and having the adults in the room lay out a clear, attainable plan for a transition to all-electric transportation within the next 50 years.
To drive the point home: If you feel you still need to argue against my claim that we need to double power generation and infrastructure, you need to argue against Elon Musk. You are free to discount me as some nutcase on HN. Elon, on the other hand, well, he is confirming what I am saying. Not sure how anyone can argue against that one.
- vel0city 5y ago> a full migration to electrics is absolutely impossible I'm definitely not one to argue the full migration to electrics. As mentioned elsewhere I think diesel/petrol/similar kind of fuel vehicles will be around in at least some capacity for quite some time. Its incredibly energy dense and the ability to just pump up gallons of it from pits in the ground is quite handy. > Some would be hybrid: plug in at home every night and top-off with fast chargers during the week as needed. I really can't imagine this would make up any large fraction of the EV fleet. If someone can charge from home, the extreme majority of their charging will be overnight or potentially during a weekend if they need to do some catch up. The vast majority of commute cars which can charge at home will not need this hybrid approach save for the extremely rare long road trip when comparing the total number of miles. > percentage of the population would only drive 20 miles a day and would be happy slow charging over eight hours That 20mi commute would generally use ~6kWh. Over 8 hours, that's 750W of power. During a time where power at people's homes is often at its lowest point. Delivering that power would barely be a blip. If our grid collapses because a few million people plug in a tiny 750W space heater overnight we've got some serious problems. > If you feel you still need to argue against my claim that we need to double power generation and infrastructure, you need to argue against Elon Musk I would, especially when it comes to long-haul trucks. Arguing against Elon is then easy in this regard, where's the long-haul driverless trucks which were going to revolutionize the entire trucking industry in 2017? EVs in this kind of capacity don't make sense without massive changes not only to the grid but also to our battery technology. Just making the batteries a little fatter isn't going to change the math on these kinds kinds of trucks. So you should pretty much just completely eliminate these kinds of vehicles from your model, its a moonshot to even think these kinds of things are really going to switch to EV-only anytime soon for many reasons. I don't doubt we'll need to make a lot of changes to our grid. I agree it will take a lot of energy to make those changes and it will use a lot of petroleum based products to make those changes. There's oil in practically everything we touch, so I agree its short sighted to praise the idea of expensive oil. I also agree this won't be something that happens overnight, it'll be something that will take an effort over decades. I agree moving to EVs is overly praised and there's quite a cult mindset of if we just put an EV in every garage we'll have solved some big problem. As you mentioned its often a question of power, and well at least down here in Texas overnight we often get to the point where there's not even enough load to match the generation available for free. On many grids there's already a good bit of slack in the power distribution in off-peak times, probably enough to support every average commuter car in every single family household. Note that term, average commuter car. Not the people which somehow are still sane after a 100+mi daily commute, they're extreme outliers and yeah it will probably take a lot of work to get to the point where all of those people are reasonably served with EVs. I think there's a bit of a disconnect between us here. You're arguing about the full migration to EVs, while I mostly agree a full migration to EVs isn't really practical anytime soon. While a large part of the average commuter car and short haul vans can probably make the switch to EVs today, it seems there are plenty of use cases where EVs are still impractical vehicles. This is before even figuring in your grid arguments. So once you then eliminate those vehicles where EVs are currently a somewhat impractical case at the moment, the math of how reasonable grid upgrades get becomes a much more practical number. Also, FWIW I do agree there will need to be some amount of an upgrade to the grid, and it will probably be a large one. Shifting all that energy which used to be handled by fluids running through pipes into cables overhead will inherently mean some amount of capacity upgrades. However, I think for average commuter cars, this really won't be that much of an impact. There are definitely cases where there will need to be a large change (DCFC corridors) but I doubt the average suburb would need some radical change. Its just adding load to a time of day that routinely experienced its lull.