Its still crazy how great solar can be when doing the maths based off his states solar farms. Imagine how great the numbers would be if the sunny parts of the world did solar too
I’m not gonna watch the full hour and a half, but I skimmed through to make sure his message was at least mostly consistent. This guy is talking about renewable energy for cars and vaguely extrapolates that to all energy requirements.
Doing a quick Google search came up with 2.2-5.2 trillion watt-hours as the amount of energy needed if all US vehicles were electric. Currently the US generates ~11 trillion watt-hours per day so this would increase that amount ~20-50%. In this video the guy mentioned a 27 megawatt solar farm (~130-150 MWh/day), but a large coal plant generates 15-24k MWh/day (500-1000 MW instantaneous).
The US currently has ~12.5k utility scale electric power plants, to replace those with solar and switch all cars to electric you would need ~2-2.5 million solar farms the size represented in the video.
The industry standard is that each megawatt a solar farm is rated takes 5-10 acres. For nuclear that value is ~0.8 acres/megawatt and for coal it’s ~0.64 acres/megawatt. While large power plants generate ~500-1000 MW they vary in size dramatically so the actual average is closer to 50 MW per plant. By that math, the current total land for existing plants should be ~400,000 acres but the equivalent if we switched to 100% solar power would be 270-675 million acres of land.
I’m not saying that renewables are bad or that we shouldn’t pursue them, I’m also not arguing that we should all hold on to gas burning cars, but there is not compelling enough evidence that switching to 100% renewable energy would be cheaper.
EDIT: The estimates here don’t include things like the coal mines included in them but it also doesn’t take into account the production of panels, batteries, or the component materials in either of them such as lithium mines. I think solar probably wins out when comparing just that side, but their land usage alone likely tips things.
This conversation chain is hilarious. The guy in the video does a great job, but you don’t want to watch 90 minutes - then watch the first 30 minutes at the very least without skimming. Okay, but then I see you go do long replies - how long did all of that take you in total? an hour? 90 minutes? for what? But it appears that you prefer it presented as a Coles notes version so maybe you learn differently.
To put it in simpler terms for those that still haven’t gotten it, if you were min-maxing for the long game, which one would ultimately come out on top? You must consider the cost of not only capital, but also environmental impacts and how this will affect the general economy as as a whole (agriculture for example rely on stable weather patterns). I am sure the long view is to go for the one that is long term sustainable with minimal drawbacks.
The only common ground that we can agree on is that the best we can do right now is to have a hybridized system. But we need to start transitioning where possible - and fast. The solar tech mentioned in the video has vastly improved since its inception. This isn’t going to happen overnight, nor in 5 years or 10 years. This is an ongoing project for humanity as a whole. Producing usable and store-able energy without killing ourselves in the long term is one of the biggest hurdles we have to face as humans.
Or …. The extra electricity needed for EVs is zero or maybe even negative. Except for batteries, power is not dispatchable. Power plants can’t react to the amount of power needed at any time and they get inefficient trying. If we had a way to charge when supply is greater than demand, we can not only make use of previously wasted power but even make power plants more efficient by giving them steadier demand
The extra electricity needed for EVs is zero or maybe even negative
That’s unlikely to be the case, the US already does use batteries in power production and the amount more we would need to switch all US power to solar would be astonishingly high.
Power plants can’t react to the amount of power needed at any time and they get inefficient trying
They can’t react in the minute by minute basis, but they do react to usage. Most coal fired plants only operate at about 50% capacity most of the time and bring on reactors to match the predicted power usage curve. When building a power curve profile the power company typically takes into account constant power as a baseline (solar and hydro being always on during the hours it is active and the power output of a given number of reactors is relatively set). Power is then supplemented with smaller generation sites which might use natural gas or even petroleum products. The smaller sites are far less efficient and make less power, but the name of the game when making power is making sure you always have enough for demand.
Let’s say it’s peak day, 25 solar farms are making 675 MW right now, each coal plant reactor can make 500 MW and the demand right now is 1250 MW. You start up your natural gas turbine plant to make up the difference during peak day, but as the sun goes down you start up reactor 2 and 3. As reactor 2 and 3 get going the power usage goes up to 1600 as people come home and the solar farms stop generating power so you continue using your turbine plant but also start drawing from your batteries. Once reactor 2 and 3 are up and running you might stop using your turbine and keep drawing from your batteries, but when people go to sleep the power usage drops to 700 MW. Now power usage has dropped but you keep the reactors going for a while or begin to shut them down (they will still make some power as they shutdown) to recharge the batteries.
All these numbers are hypothetical, but it’s a description of how the process works.
Clearly this sub haven’t seen this video from Technology Connections. It breaks it all down for you step by step why the statement is true.
Its still crazy how great solar can be when doing the maths based off his states solar farms. Imagine how great the numbers would be if the sunny parts of the world did solar too
I’m not gonna watch the full hour and a half, but I skimmed through to make sure his message was at least mostly consistent. This guy is talking about renewable energy for cars and vaguely extrapolates that to all energy requirements.
Doing a quick Google search came up with 2.2-5.2 trillion watt-hours as the amount of energy needed if all US vehicles were electric. Currently the US generates ~11 trillion watt-hours per day so this would increase that amount ~20-50%. In this video the guy mentioned a 27 megawatt solar farm (~130-150 MWh/day), but a large coal plant generates 15-24k MWh/day (500-1000 MW instantaneous).
The US currently has ~12.5k utility scale electric power plants, to replace those with solar and switch all cars to electric you would need ~2-2.5 million solar farms the size represented in the video.
The industry standard is that each megawatt a solar farm is rated takes 5-10 acres. For nuclear that value is ~0.8 acres/megawatt and for coal it’s ~0.64 acres/megawatt. While large power plants generate ~500-1000 MW they vary in size dramatically so the actual average is closer to 50 MW per plant. By that math, the current total land for existing plants should be ~400,000 acres but the equivalent if we switched to 100% solar power would be 270-675 million acres of land.
I’m not saying that renewables are bad or that we shouldn’t pursue them, I’m also not arguing that we should all hold on to gas burning cars, but there is not compelling enough evidence that switching to 100% renewable energy would be cheaper.
EDIT: The estimates here don’t include things like the coal mines included in them but it also doesn’t take into account the production of panels, batteries, or the component materials in either of them such as lithium mines. I think solar probably wins out when comparing just that side, but their land usage alone likely tips things.
This conversation chain is hilarious. The guy in the video does a great job, but you don’t want to watch 90 minutes - then watch the first 30 minutes at the very least without skimming. Okay, but then I see you go do long replies - how long did all of that take you in total? an hour? 90 minutes? for what? But it appears that you prefer it presented as a Coles notes version so maybe you learn differently.
To put it in simpler terms for those that still haven’t gotten it, if you were min-maxing for the long game, which one would ultimately come out on top? You must consider the cost of not only capital, but also environmental impacts and how this will affect the general economy as as a whole (agriculture for example rely on stable weather patterns). I am sure the long view is to go for the one that is long term sustainable with minimal drawbacks.
The only common ground that we can agree on is that the best we can do right now is to have a hybridized system. But we need to start transitioning where possible - and fast. The solar tech mentioned in the video has vastly improved since its inception. This isn’t going to happen overnight, nor in 5 years or 10 years. This is an ongoing project for humanity as a whole. Producing usable and store-able energy without killing ourselves in the long term is one of the biggest hurdles we have to face as humans.
Or …. The extra electricity needed for EVs is zero or maybe even negative. Except for batteries, power is not dispatchable. Power plants can’t react to the amount of power needed at any time and they get inefficient trying. If we had a way to charge when supply is greater than demand, we can not only make use of previously wasted power but even make power plants more efficient by giving them steadier demand
That’s unlikely to be the case, the US already does use batteries in power production and the amount more we would need to switch all US power to solar would be astonishingly high.
They can’t react in the minute by minute basis, but they do react to usage. Most coal fired plants only operate at about 50% capacity most of the time and bring on reactors to match the predicted power usage curve. When building a power curve profile the power company typically takes into account constant power as a baseline (solar and hydro being always on during the hours it is active and the power output of a given number of reactors is relatively set). Power is then supplemented with smaller generation sites which might use natural gas or even petroleum products. The smaller sites are far less efficient and make less power, but the name of the game when making power is making sure you always have enough for demand.
Let’s say it’s peak day, 25 solar farms are making 675 MW right now, each coal plant reactor can make 500 MW and the demand right now is 1250 MW. You start up your natural gas turbine plant to make up the difference during peak day, but as the sun goes down you start up reactor 2 and 3. As reactor 2 and 3 get going the power usage goes up to 1600 as people come home and the solar farms stop generating power so you continue using your turbine plant but also start drawing from your batteries. Once reactor 2 and 3 are up and running you might stop using your turbine and keep drawing from your batteries, but when people go to sleep the power usage drops to 700 MW. Now power usage has dropped but you keep the reactors going for a while or begin to shut them down (they will still make some power as they shutdown) to recharge the batteries.
All these numbers are hypothetical, but it’s a description of how the process works.