The Electric Car
in [Design]
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From: MooseFET on 9 Aug 2007 06:10 On Aug 8, 7:37 am, Gary Tait <classic...(a)yahoo.com> wrote: > Guy Macon <http://www.guymacon.com/> wrote innews:W8GdnQS9I_ZqOSXbRVn_vw(a)giganews.com: > > > You will never see pneumatics in a bulldozer, and you will > > never see hydraulics in a machine that puts CDs into CD > > cases. Having worked as a design engineer for both Parker > > Hydraulics and SMC Pnuematics, I don't see either of them > > cutting into the other's business. > > FWIW, I have seens both pnuematics and hyraulics on the same systems > before. > Pnuematics used for quick low power actuating (guiding product); the > plumbing and controls are a bit simpler, hydraulics for the bull work; > orbit motors and a hydraulic lift. It is a question of storing energy that was at issue not of taking it from place to place. In a car the tranfer of power is well handled by the mechanical transmission. For energy storage in a hydraulic system, hydro-pneumatic accumulators are the most commonly used accumulators. The energy is stored by compressing the gas in the accumulator. This is the path the US EPA took on this: http://www.epa.gov/otaq/technology/420f04019.pdf
From: MooseFET on 9 Aug 2007 06:19 On Aug 8, 8:33 am, John Larkin <jjlar...(a)highNOTlandTHIStechnologyPART.com> wrote: > On Wed, 08 Aug 2007 06:26:07 -0700, MooseFET <kensm...(a)rahul.net> > wrote: > [....] > >> I'm getting 18 MPG in my 5-cylinder Rabbit, driving to/from work on > >> the hills of San Francisco. I average about 4000 miles per year. > > >That would also be a hard environment for a non-special purpose > >electric car. The very low speeds and a lot of starting on upgrades > >etc would make for a low range in an electric. Since your trip is to > >work and back, you can't be going far so an electric car would work > >for you. > > We have a friend with a new Toyota hybrid, and she gets about the same > mileage that I do. Hauling all those batteries up and down the hills > isn't efficient. The energy per pound issue with the batteries is a major drawback in SF. On flat roads, the hybrid would perhaps do better than the rabbit. The rabbit does have very good fuel economy numbers IIRC. > >Far better would be to extend the cable car system. It takes a quite > >low energy input per person moved. > > The cable cars are great fun, but they're slow and not very reliable. > I think the entire system is run by a single 500 HP electric motor. The reliablity issue has a lot to do with the age of the system and the money allocated to maintaining it. > >It may be best if the Muni system was removed. From what I read in > >the news, it kills more people than it takes safely to their > >destination. > > Some of Muni is great. It moves about 700K people per day, about equal > to the population. Most downtown workers, including over half of my > employees, take Muni to work. The best part is the underground Metro > lines, the electric busses, and the F line, the antique streetcars on > Market Street and the Embarcadero. The worst part is the diesel busses > that pollute and congest. Some years back it was calculated that SamTrans raun at such a high cost that it would be cheaper to buy everyone who used it a car and pay for the gas. Busses are a dumb way to do transit. They have all the problems of the personal car. > > http://s2.supload.com/free/StreetCars.jpg/view/ > > http://s2.supload.com/free/30thStreet.jpg/view/ > > John
From: MooseFET on 9 Aug 2007 06:36 On Aug 8, 11:22 pm, Richard Henry <pomer...(a)hotmail.com> wrote: > On Aug 8, 9:57 pm, James Arthur <dagmargoodb...(a)yahoo.com> wrote: > > > > > On Aug 8, 3:42 pm, Eeyore <rabbitsfriendsandrelati...(a)hotmail.com> > > wrote: > > > > James Arthur wrote: > > > > Meanwhile, the US' total CO2 output fell last year. Has anyone > > > > noticed? I thought not. > > > > Obviously since it's not something that can result in increased fear and alarm, > > > the meeja won't be interested. > > > > Do you have a link for that ? > > > > Graham > > > See page 2 of this: > > http://www.eia.doe.gov/oiaf/1605/flash/flash.html > > The numbers indicate that this measure is an indicator of a depressed > economy. You can only run the credit card debt up so far. The US has been spending down its assets for the last several years. Now they are starting to run out. The whole economic rise since 2000 is an illusion. The average person is worse off today than 7 years ago. Their wages are down and they are further in debt. Buy spending their savings they have maintained a high standard of living and hence a high CO2 production for about as long as they could. Now we should expect at least a couple of bad years and a bear market and less CO2.
From: Jim Thompson on 9 Aug 2007 10:22 On Thu, 09 Aug 2007 02:38:38 -0700, RichD <r_delaney2001(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? You should ask her if it's OK for a convicted felon to sign a petition... then sign a fictitious name and address along with the annotation "convicted felon" ;-) ...Jim Thompson -- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona Voice:(480)460-2350 | | | E-mail Address at Website Fax:(480)460-2142 | Brass Rat | | http://www.analog-innovations.com | 1962 | America: Land of the Free, Because of the Brave
From: BradGuth on 9 Aug 2007 10:30
On Aug 8, 5:47 pm, RichD <r_delaney2...(a)yahoo.com> wrote: > On Jul 28, Eeyore <rabbitsfriendsandrelati...(a)hotmail.com> wrote: > > > > > >This is another reason why hybrids make more sense. Pure EVs > > > > >have too many limitations. > > > > > If they could recharge in 10 mins, the US power grid would burn out > > > > What about these? > > >http://altairnano.com/markets_amps.html > > > 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, we can't worry about filty lucre. > What are you, a greedy Republican? > > Let the gov't fund it, won't cost a farthing! That's > why we need visionaries like Al Gore, bold men > not afraid to take on the special interests, leading > by example. > > -- > Rich How much cheap h2o2 would you like for your electric cars? How about a Hummwe/SUV at zero NOx and 100 empg? - Brad Guth |