The Electric Car
in [Design]
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From: bsr3997 on 12 Aug 2007 13:36 On Aug 9, 5:38 am, RichD <r_delaney2...(a)yahoo.com> wrote: > On Aug 8, Dan Bloomquist <publi...(a)lakeweb.com> wrote: > > > >>Shockingly expensive. $75,000 per vehicle just for batteries. > > >>http://www.greencarcongress.com/2006/07/altair_nanotech.html > > > > Expensive, who cares? We're talking about the > > > ENVIRONMENT...... > > > But 'we' will ignore human nature and real world economies....... > > One's ideals have nothing to do with our current paradigm.... > > A story: > Some years ago, I'm entering a Safeway, a > pretty girl accosts me, she wants a signature > on a petition to nuke the baby seals or > something. I retort: "We have enough taxes > and feelgood ecoprograms, I'l pass." > > She answers: "It won't require new taxes, it > willl be funded by bonds." > > Yes folks, a breakthrough in political economy... > gubmit programs can be paid for with bonds, > NO TAXES NEEDED. > > She was sweet and earnest and dim, a > concerned citizen.. and a voter. Scary, huh? > > -- > Rich http://www.youtube.com/watch?v=yi3erdgVVTw :-)
From: Eeyore on 12 Aug 2007 14:42 JosephKK wrote: > Eeyore posted to sci.electronics.design: > > James Arthur wrote: > > > >> b) Remember that measurement system you left here a few centuries > >> ago? > > > > "a few centuries ago" > > > > It seems that Americans are incapable of moving on. > > And you are trying to hold up the UK as an example of moving on?? > How about you learn to drive on the "right" side of the road. There's nothing superior about driving on the right. Have a moan at Japan, Australia, India, New Zealand, India, South Africa, much of Africa generally, much of the Caribbean, Ireland, Malaysia, Indonesia, Singapore etc etc if you don't like the way we do it. > How about you really go metric? Name the non-metric measurements still in official use in the UK. Graham
From: MooseFET on 12 Aug 2007 15:04 On Aug 12, 10:12 am, Guy Macon <http://www.guymacon.com/> wrote: > MooseFET wrote: > >.. and yet the hydraulic hybrid autos seem to be using it to store the > >energy > >http://www.theautochannel.com/news/2006/08/14/018529.html > > Storing the energy of braking to a stop so as to give it back > when you accelerate requires a lot less energy storage than > storing enough energy to replace the engine. It's well worth > doing in the case of a delivery truck, but it isn't a practical > replacement for an electric car. I never suggested it as a replacement for the electric car. The question was about how to do a hybrid system. In a hybrid, the total amount of energy to store is much less but the number of cycles is huge.
From: Eeyore on 12 Aug 2007 15:07 MooseFET wrote: > Don Lancaster <d...(a)tinaja.com> wrote: > > MooseFET wrote: > > > > > Yes that surprises me too. It still will store a lot of energy per > > > pound in the air part. Compressed air has a lot of nice qualities for > > > this sort of purpose. > > > > Nope. > > Energy per pound storage is trivial compared to alternatives. > > I assume you have a number to back this up. Remember it is energy per > pound. The pounds don't matter so much if the storage tank ends up being impossible large. Same problem with hydrogen as a fuel. Graham
From: MooseFET on 12 Aug 2007 15:07
On Aug 12, 10:02 am, Guy Macon <http://www.guymacon.com/> wrote: > Don Lancaster wrote: > > >MooseFET wrote: > > >> Yes that surprises me too. It still will store a lot of energy per > >> pound in the air part. Compressed air has a lot of nice qualities for > >> this sort of purpose. > > >Nope. > >Energy per pound storage is trivial compared to alternatives. > > >Energy per pound is also totally meaningless for terrestrial auto aps. > > >Start with any thermo book and read example problem #1 on isothermal > >versus lossy air compression. > > >Hard to reach 15 watthours per liter and 60 percent efficiency. > > Don is right. I have designed many pneumatic systems with energy > storage. Storing enough to bring a bunch of pneumatic actuators > to a safe position on power loss is easy. Storing enough to be > a practical energy source for a car? Not at all practical. This isn't about replacing an electric car. This is about making a hybrid system. There is a huge difference in the requirements. The weight of the lead acid batteries is a big problem in the design of a hybrid. > Not > only that, but it would make an excellent bomb just waiting to go > off in a crash. The lithium batteries are also a problem in a crash. > > -- > Guy Macon > <http://www.guymacon.com/> > |