well its true, i dont know the conversion from mah/g to kwh/kg here, but im going on that 1005mah/g figure stated, and its comparison to the 200mah/g for a current lithium ion battery. and im being conservative, using the 4x multiplier instead of 5x. And since they say charge-discharge cycles, i presume they measured the energy coming out of the battery.
well, you attached your name to some sarcastic pablum, and it still didnt make it worthwhile to say. But hey, at least now you know 1 more thing than you did before. have a gold star.
Lets see what the range on a typical light aircraft would be if you ripped out the full fuel tanks and gasoline engine and stuffed it with a equivalent power electric engine and these new batteries to the same weight. So it says it will store 4-5 times as much energy as todays best lithium-ion batteries. the best li-ion today is lithium cobalt, at about 165 wh/kg. So x4 of that is 660 wh/kg.
now, lets take a light plane for which I can find enough info to do this with, the jabiru j160D ok. so the fuel in it weighs (135L * 0.72kg/L) = 97.2kg. Now, the engine in it, the Jabiru 2200cc Aircraft Engine, weighs 62.8kg, and has a max power output of 60kw, and cruises at 75% power, so lets assume 50kw cruise power to account for takeoff and landing. So in total, engine and fuel weight 97.2 + 62.8 = 160kg
so lets rip that 160kg out and replace it with a EMRAX228 Brushless AC electric Motor with a 100kw power output and weighing in at 11.9kg, leaving us 148.1 kg worth of batteries, with a energy storage capacity of 148.1 * 0.66 = 97.746 kwh. so, at the cruise speed of 100knots = 185.2km/h, your looking at a range of (97.746kwh / 50kw) * 185.2km/h = 362km in about 2 hours.
The gasoline version can fly at the same speed for 8.5 hours. So, sure, the range is a quarter of the gasoline one, but you could ditch a passenger, chuck another 100kg of batteries in there and get that up to about 3.5 hours and 630km of range. Pretty damn good for a few dollars of electricity, negligible maintainence costs on a electric engine vs gasoline engine. sure as hell beats the $100+ youll pay for fuel alone for that same 3.5 hour trip.
Um, what? Specific energy is wh/kg, and is much more important than the amount of volume the battery takes up. Pushing extra battery weight around takes more energy, extra volume isnt that hard to deal with.
Don't forget that gasoline engines typically turn only about 20-30% of the chemical energy into mechanical energy, whereas electric motors are about 90%. And you get rid of a heavy gasoline engine.
Thats adorable. "a whole 2 launches!". Meanwhile the grasshopper VTVL test rocket did 7 jumps, while using a merlin D engine. This isnt your daddys shuttle main engine.
Are you sure about that reconditioning? your comparing it to the space shuttle engine, that needed to be torn down, inspected, and rebuilt after every flight. But that was because it was built to razor thin engineering tolerances. The merlin engine is quite a bit more durable.
why do we even have.com or.org or.net on the end. Surely the classification of organization at a address can be stored in some other way, and not be so important as to need to be typed in every time you go to that url. I mean, why cant i just type 'slashdot' in the address bar. Damn near everyone defaults to.com anyway.
Its so fucking awesome that we have a enlightened individual such as yourself to convey these revelations to all the poor people. Well apart from the fact that per calorie, processed and sugary drinks cost less. If your gonna be a sanctimonious, patronizing ass, the least you could do is be not wrong.
Hey wow! Yeah! Itd be even cooler if we could pay people money to specialize in some sort of large scale "community farm", that way we get efficiencies of scale! And then they turn around and invest that income into their "community farm". And to encourage them to invest, we could have them own that "community farm", at which point itd be known as a "farm". That would be super cool!
Im assuming, of course, that this work is at the minimum wage, right? cause workfare in the UK sure as hell isnt now. And its been replacing properly paid jobs too.
The Virtuix Omni is a gimmick that is trying to ride the coattails of the Oculus Rifts success. Dont let cheesy crap like this distract from the Oculus. Really the only addon I can see being actually useful for the Rift would be positional controls, like the STEM. But even thats in doubt if Oculus vr release positional controls of their own beside the release of the consumer rift.
They got rid of most of the stupid shit in SC1 for SC2, the pointless micro, and that stupid fucking 12 unit limit. using a imposed UI deficiency to shape how the game is played is fucking criminal. now most of the micro has a tactical reason. choosing the right point to stim, laying down good force fields, etc. fuck the "micro feel" of SC1.
combustion engine cars convert 15% of the chemical energy in their fuel into forward motion. The tesla gets 88% of the energy in its batteries in foward motion. Sure, theres efficiency losses in electricity transmission from a power station to a car charging point, but electric opens up the possibility of using alternative energy sources, like festooning your roof with solar panels and charging with those. the tesla uses energy over 4x more efficiently, from more sources, and you say that dosent change anything? Your wrong, and you should stick to 'summarizing' things you know something about.
and we care about his opinion because he heads a successful electric car company. pretty fucking relevant if you ask me. more relevant than your opinion.
ok, firstly, that "80% efficiency when it provides both heat and power" is a copout. any engine can be 100% efficient when you classify usable energy output as both heat and electricity. i wanna know the efficiency of the electricity production.
secondly, how long is the lifetime of the unit? how much fuel can it process before the catalyst or membrane or whatever wears out? and how expensive is the catalyst? is it still made out of freaking platinum?
thirdly, can this thing be used in vehicles? planes? cause thats the real application of something like this.
Slashdot Mirror
well its true, i dont know the conversion from mah/g to kwh/kg here, but im going on that 1005mah/g figure stated, and its comparison to the 200mah/g for a current lithium ion battery. and im being conservative, using the 4x multiplier instead of 5x. And since they say charge-discharge cycles, i presume they measured the energy coming out of the battery.
well, you attached your name to some sarcastic pablum, and it still didnt make it worthwhile to say. But hey, at least now you know 1 more thing than you did before. have a gold star.
actually, i should probably lop off about 30km range to account for energy losses from the electric engine.
now, lets take a light plane for which I can find enough info to do this with, the jabiru j160D ok. so the fuel in it weighs (135L * 0.72kg/L) = 97.2kg. Now, the engine in it, the Jabiru 2200cc Aircraft Engine, weighs 62.8kg, and has a max power output of 60kw, and cruises at 75% power, so lets assume 50kw cruise power to account for takeoff and landing. So in total, engine and fuel weight 97.2 + 62.8 = 160kg
so lets rip that 160kg out and replace it with a EMRAX228 Brushless AC electric Motor with a 100kw power output and weighing in at 11.9kg, leaving us 148.1 kg worth of batteries, with a energy storage capacity of 148.1 * 0.66 = 97.746 kwh. so, at the cruise speed of 100knots = 185.2km/h, your looking at a range of (97.746kwh / 50kw) * 185.2km/h = 362km in about 2 hours.
The gasoline version can fly at the same speed for 8.5 hours. So, sure, the range is a quarter of the gasoline one, but you could ditch a passenger, chuck another 100kg of batteries in there and get that up to about 3.5 hours and 630km of range. Pretty damn good for a few dollars of electricity, negligible maintainence costs on a electric engine vs gasoline engine. sure as hell beats the $100+ youll pay for fuel alone for that same 3.5 hour trip.
Um, what? Specific energy is wh/kg, and is much more important than the amount of volume the battery takes up. Pushing extra battery weight around takes more energy, extra volume isnt that hard to deal with.
If you get it to the point that you can drive the car all day on a full battery, the "overnight" part wont matter so much.
I guess he doesn't know. I imagine there's a lot of things he doesn't know.
Don't forget that gasoline engines typically turn only about 20-30% of the chemical energy into mechanical energy, whereas electric motors are about 90%. And you get rid of a heavy gasoline engine.
Thats adorable. "a whole 2 launches!". Meanwhile the grasshopper VTVL test rocket did 7 jumps, while using a merlin D engine. This isnt your daddys shuttle main engine.
Elon Musk has stated in the past that "a little seawater" wouldnt harm the engines.
Are you sure about that reconditioning? your comparing it to the space shuttle engine, that needed to be torn down, inspected, and rebuilt after every flight. But that was because it was built to razor thin engineering tolerances. The merlin engine is quite a bit more durable.
why do we even have .com or .org or .net on the end. Surely the classification of organization at a address can be stored in some other way, and not be so important as to need to be typed in every time you go to that url. I mean, why cant i just type 'slashdot' in the address bar. Damn near everyone defaults to .com anyway.
pigs arent endangered.
Its so fucking awesome that we have a enlightened individual such as yourself to convey these revelations to all the poor people. Well apart from the fact that per calorie, processed and sugary drinks cost less. If your gonna be a sanctimonious, patronizing ass, the least you could do is be not wrong.
Hey wow! Yeah! Itd be even cooler if we could pay people money to specialize in some sort of large scale "community farm", that way we get efficiencies of scale! And then they turn around and invest that income into their "community farm". And to encourage them to invest, we could have them own that "community farm", at which point itd be known as a "farm". That would be super cool!
Im assuming, of course, that this work is at the minimum wage, right? cause workfare in the UK sure as hell isnt now. And its been replacing properly paid jobs too.
but that would lessen the power employers have over their employees, the rich cant have that.
The Virtuix Omni is a gimmick that is trying to ride the coattails of the Oculus Rifts success. Dont let cheesy crap like this distract from the Oculus. Really the only addon I can see being actually useful for the Rift would be positional controls, like the STEM. But even thats in doubt if Oculus vr release positional controls of their own beside the release of the consumer rift.
you dont have a clue how orbital physics works do you.
They got rid of most of the stupid shit in SC1 for SC2, the pointless micro, and that stupid fucking 12 unit limit. using a imposed UI deficiency to shape how the game is played is fucking criminal. now most of the micro has a tactical reason. choosing the right point to stim, laying down good force fields, etc. fuck the "micro feel" of SC1.
Does it predict any room temperature superconductors?
i like how you used the word 'cultural' in place of 'all this newfangled tech is scaring the olds, slow down a bit dagnammit'
yeah, but 39 inch computer monitor with smaller pixels than my current monitor? hell yeah!
combustion engine cars convert 15% of the chemical energy in their fuel into forward motion. The tesla gets 88% of the energy in its batteries in foward motion. Sure, theres efficiency losses in electricity transmission from a power station to a car charging point, but electric opens up the possibility of using alternative energy sources, like festooning your roof with solar panels and charging with those. the tesla uses energy over 4x more efficiently, from more sources, and you say that dosent change anything? Your wrong, and you should stick to 'summarizing' things you know something about. and we care about his opinion because he heads a successful electric car company. pretty fucking relevant if you ask me. more relevant than your opinion.
ok, firstly, that "80% efficiency when it provides both heat and power" is a copout. any engine can be 100% efficient when you classify usable energy output as both heat and electricity. i wanna know the efficiency of the electricity production.
secondly, how long is the lifetime of the unit? how much fuel can it process before the catalyst or membrane or whatever wears out? and how expensive is the catalyst? is it still made out of freaking platinum?
thirdly, can this thing be used in vehicles? planes? cause thats the real application of something like this.