Recent comments in /f/Futurology
ajmmsr t1_jaqs9iv wrote
Reply to comment by SandAndAlum in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
Arrrgh
Yeah 262PWh at 100% capacity factor
Since wind cf is about 30% That’s 78.8PWh of energy, so 2.7 times the USA energy.
No where in that article does it mention nameplate
kaiww77 t1_jaqs4sk wrote
Reply to comment by NVincarnate in With The Help Of AI, By When Will There Be Drugs That De-Ages Humans And Keeps Us Forever Young? by AnakinRagnarsson66
You have seen the current state of longevity research right? Things are moving ahead rapidly
Poly_and_RA t1_jaqrge4 wrote
Nouriel Roubini has predicted about 25 of the last 3 recessions. A stopped clock is right twice a day, but it's not a particularly good or usable clock.
SandAndAlum t1_jaqrcr1 wrote
Reply to comment by ajmmsr in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
30 * 8.760 is 260 not 26.
Net implying average output over the year. Ie. A 3.3kW nameplate tilting solar system in California is 1kW net. Primary energy is input, final energy is what is achieved. A 25% efficient gas engine running on tar sand oil with an EROI of 3 needs about 6kW of primary energy for 1kW of output. The 500GW or so of primary energy powering US transport can be replaced by 100GW of electricity. Similarly 200GW of gas heating can be 50GW of electric heat pump.
If the 30TW is nameplate then the capacity factor cancels some of the waste heat, so it's merely 10x what the US uses not 30x.
ajmmsr t1_jaqr4hs wrote
Reply to comment by SandAndAlum in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
TW is power so multiply by a time to get energy
Here’s my reference to USA energy https://www.energy.gov/sites/default/files/2022-08/Energy_2021_United-States_0.png
Don’t know what you mean by ‘net’
Robbieopreddit t1_jaqqzga wrote
Reply to What are some problems on which I can develop apps using the latest technologies. I want some ideas on projects by rare_redditor0
An app providing the power price in real time (for those with a flex, read 15 minutes charging mechanism). Than you can save or even earn with the electricity connection
Delicious_Summer7839 t1_jaqn4oz wrote
Reply to comment by sparrowclaw1 in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
COLTAN mining by children in Congo.
RedCascadian t1_jaqkkut wrote
Reply to comment by VincentGrinn in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
People get weird when you point out how objectively bad American suburbs are
Alejandro_Meliche t1_jaqiojl wrote
Reply to What are some problems on which I can develop apps using the latest technologies. I want some ideas on projects by rare_redditor0
If you make in the long run, an AI-based app that gives you laws that you might break and potential sanction if you do something in your country, but be sure to specify that information won't be given to the third parties. As a law student, add ability to see which laws exactly will affect your situation. If it's short-term, make an app that makes recipes for random dishes
BenjaminHamnett t1_jaqdkh0 wrote
Reply to Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
Where are we getting these? How come I never see a wind turbine or solar panel factory run on alternative energy? I hope we can build these all next to hydro dams and geothermal plants, tidal etc but something tells me those are expensive exceptions and not the norm
Until then, these are batteries that we probably don’t want to see how they’re made
VincentGrinn t1_jaqccyc wrote
Reply to comment by Carl_The_Sagan in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
bruh how tf you going claim a solar farm is an eyesore
do they commute to work in a helicopter or something?
its not even at ground level or anything! it was suppose to be ontop of a mesa with a setback from the edge that made it out of line of sight
VincentGrinn t1_jaqc5e3 wrote
Reply to comment by RedCascadian in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
dunno why youre being downvoted, youre entirely correct
VincentGrinn t1_jaqbzg9 wrote
Reply to comment by ajmmsr in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
south australia is somewhere around 15-25% renewables from what i can see
iceland is 25% geothermal 75% hydro
paraguay is 99.8% hydro and 0.2% biofuel which is honestly incredible, they use like 3x as much power as iceland
also apparently albania and the DRC are 100% hydro but that seems odd
VincentGrinn t1_jaqbf65 wrote
Reply to comment by 6thReplacementMonkey in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
not exactly hard to be cheaper than fossil fuels, i mean the global fossil fuel industry is subsidized 16 billion dollars PER DAY, and is still more expensive than renewables
on an entirely unrelated note the global fossil fuel industry makes a profit of 6 billion dollars per day, way to go guys
Psychological-Sport1 t1_jaq9p39 wrote
Reply to comment by prophet001 in With The Help Of AI, By When Will There Be Drugs That De-Ages Humans And Keeps Us Forever Young? by AnakinRagnarsson66
Initially yes, but once the rich demonstrate successful aging reversal tech, and use it on themselves then all their followers will sit up and take notice, if bill gates made many billions selling Microsoft Windows with every new computer then how much would insurance companies charge if you got your anti-aging tuneup every 10 years ???
Carl_The_Sagan t1_jaq65q7 wrote
Reply to comment by SandAndAlum in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
I dunno, the appeal of localism is that getting angry and showing up to meetings actually works, unlike other politics
Radulescu1999 t1_jaq5yy1 wrote
Reply to comment by cryptosupercar in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
>The current petroleum product mix being consumed is 130,000 TWh of coal, oil, and gas. It’s growing at a rate of 1000 TWh per year.
>
>Where does he get 30 TWh?
"Normally the consumption is given in TWh, which is an energy unit. One TW corresponds to 8,760 TWh per year."
130,000TWh/8760TWh = 14.84TW
30TW > 14.84 TW
[deleted] t1_jaq5j2r wrote
Radulescu1999 t1_jaq4k6a wrote
Reply to comment by 6thReplacementMonkey in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
>It has always been cheaper overall to switch to renewables.
If that was true, China would already be 100% renewable. They are not.
dbx999 t1_jaq3pzf wrote
Reply to comment by MLS_Analyst in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
The switch from incandescent bulbs to LED/CFL bulbs also cut a great deal of energy needs. 60W down to 8-12W per bulb
OriginalCompetitive t1_jaq2s2j wrote
Reply to Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
Isn’t anybody in this thread gonna say something mean about Musk?
cryptosupercar t1_jaq08dp wrote
Reply to Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
The current petroleum product mix being consumed is 130,000 TWh of coal, oil, and gas. It’s growing at a rate of 1000 TWh per year.
Where does he get 30 TWh?
SandAndAlum t1_japywoa wrote
Reply to comment by Carl_The_Sagan in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
Even the locals are usually just responding to scare campaigns.
Carl_The_Sagan t1_japw5gj wrote
Reply to comment by SandAndAlum in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
Not ruling this out, but you may be underestimating true nimbyism
SandAndAlum t1_jaqsy07 wrote
Reply to comment by ajmmsr in Electric world that kicks out fossil fuels will cost less than combustion economy. 30TW of wind and solar PV will take 0.2% of earth's surface. by DisasterousGiraffe
It's ambiguous then as to what cf they mean.
New western offshore wind is in the 40-50% cf range. EU solar is 13% so there's a big range there.
10TW net final energy to replace existing 18TW of world wide primary energy and cover some growth sounds pretty close to most ballparks so 30TW of 30% cf sounds reasonable.