If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
|
Ads |
#2
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
"Useful Info" > wrote in message
oups.com... > Read all about it, he http://Muvy.org > > More spam by the tinfoil hat site. Gotta say, they advertise the normal stuff and leave teh weird subjects until you actually look at the site. Mike |
#3
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
On Fri, 25 May 2007 15:38:44 -0700, Michael Pardee wrote:
> "Useful Info" > wrote in message > oups.com... >> Read all about it, he http://Muvy.org >> >> > More spam by the tinfoil hat site. Gotta say, they advertise the normal > stuff and leave teh weird subjects until you actually look at the site. > > Mike Gee...at my age, I have plenty of...uh "compressed air". Maybe I ought to look into one of these! |
#4
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
Michael Pardee wrote:
> More spam by the tinfoil hat site. Gotta say, they advertise the > normal stuff and leave teh weird subjects until you actually look > at the site. So, skip right to the source: http://youtube.com/watch?v=QmqpGZv0YT4 A "Beyond Tomorrow" segment, worth the watch. |
#5
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
Fishface wrote:
> Michael Pardee wrote: >> More spam by the tinfoil hat site. Gotta say, they advertise the >> normal stuff and leave teh weird subjects until you actually look >> at the site. > > So, skip right to the source: > http://youtube.com/watch?v=QmqpGZv0YT4 > A "Beyond Tomorrow" segment, worth the watch. I think for things like the fork lifts, as well as lawn mowers, it is a great thing. It really get rid of fumes and will really help the environment. All you're doing is taking energy in one form and putting it in another. I could be wrong, but I don't see how it will increase fuel efficiency that much. Effectively, you're just making the CO2 at the electric power plant rather in the car engine (assuming the air is compressed with electric motors). I think it has many advantages like weight. And it is probably more reliable. I mean far fewer parts to break. But, I would have to see the evidence that it is really that much more efficient to believe it. Jeff |
#6
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
"Jeff" > wrote in message
news:b1_5i.3446$D31.888@trnddc01... > > I think for things like the fork lifts, as well as lawn mowers, it is a > great thing. It really get rid of fumes and will really help the > environment. All you're doing is taking energy in one form and putting it > in another. I could be wrong, but I don't see how it will increase fuel > efficiency that much. Effectively, you're just making the CO2 at the > electric power plant rather in the car engine (assuming the air is > compressed with electric motors). > Worse than that, air (and most gases that have low boiling points) are not very "elastic." Air has a ratio of specific heats of around 1.4, so about 1/3 of the energy is lost just to the compression and expansion. Batteries can do a lot better. The compressed air has to be used at raw pressure - that's the point, after all - and it is very difficult to make motors that can maintain efficiency over the range of pressures necessary to make the system work. It's much more like charging a giant, lossy capacitor. I'd be shocked at getting anything near 50% overall efficiency, something EVs do with ease. Mike |
#7
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
"Michael Pardee" > wrote in message .. . > > Worse than that, air (and most gases that have low boiling points) are not > very "elastic." Air has a ratio of specific heats of around 1.4, so about > 1/3 of the energy is lost just to the compression and expansion. Batteries > can do a lot better. The compressed air has to be used at raw pressure - > that's the point, after all - and it is very difficult to make motors that > can maintain efficiency over the range of pressures necessary to make the > system work. It's much more like charging a giant, lossy capacitor. I'd be > shocked at getting anything near 50% overall efficiency, something EVs do > with ease. > > Mike > > > Nevertheless, this type of thinking is what will save us from fossil fuels. The compressed air cars are doing pretty well, and if you use solar power to charge them up, it's free energy. The car I saw on NG channel, (maybe Discovery), was still in development, but the engine was also able to be the compressor, and he was developing an electric motor to make the car self-contained. If the technology was pushed to it's limits, it could do a lot better. Hey, if you put the car in reverse, and roll forward down a hill, it'll charge it's own tanks! Batteries are very very bad for the environment. |
#8
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
"Dan G" > wrote in message
. .. > > "Michael Pardee" > wrote in message > .. . >> >> Worse than that, air (and most gases that have low boiling points) are >> not >> very "elastic." Air has a ratio of specific heats of around 1.4, so about >> 1/3 of the energy is lost just to the compression and expansion. >> Batteries >> can do a lot better. The compressed air has to be used at raw pressure - >> that's the point, after all - and it is very difficult to make motors >> that >> can maintain efficiency over the range of pressures necessary to make the >> system work. It's much more like charging a giant, lossy capacitor. I'd >> be >> shocked at getting anything near 50% overall efficiency, something EVs do >> with ease. >> >> Mike >> >> >> > > Nevertheless, this type of thinking is what will save us from fossil > fuels. > The compressed air cars are doing pretty well, and if you use solar power > to > charge them up, it's free energy. The car I saw on NG channel, (maybe > Discovery), was still in development, but the engine was also able to be > the > compressor, and he was developing an electric motor to make the car > self-contained. If the technology was pushed to it's limits, it could do a > lot better. Hey, if you put the car in reverse, and roll forward down a > hill, it'll charge it's own tanks! > > Batteries are very very bad for the environment. > > > The physics of the technology pretty much cap the energy storage efficiency at 50% max, and it's going to be hard to break the 35% barrier. The ratio of specific heats problem (the same thing that makes a basketball "deader" than a superball) won't go away as long as this universe is in existence. Adaptive air motors are possible but always tricky. Using only the "top half" of the pressure charge means hauling around a lot of dead weight. Batteries don't have to be bad for the environment at all. The heavy metals that are most to blame for batteries' bad rep are completely recyclable. The larger batteries get the less likely they will escape the recycling stream; even standard car batteries are rarely dumped any more. Air powered cars have been around longer than electric cars - there are reasons they haven't caught on. In a time when efficiency is seen as more important than ever, the inherent inefficiency of compressed air makes this a tough sell. Mike |
#9
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
Fishface wrote: > Michael Pardee wrote: > > More spam by the tinfoil hat site. Gotta say, they advertise the > > normal stuff and leave teh weird subjects until you actually look > > at the site. > > So, skip right to the source: > http://youtube.com/watch?v=QmqpGZv0YT4 > A "Beyond Tomorrow" segment, worth the watch. Seen it before. It just shows how easy it is to pull the wool over the eyes of TV reporters. Graham |
#10
|
|||
|
|||
Behold the CityCAT air car, powered by compressed air.
Dan G wrote: > Nevertheless, this type of thinking is what will save us from fossil fuels. No it won't. They are *less* efficient that EVs, so need MORE energy to keep them running. > The compressed air cars are doing pretty well, Where exactly ? Except in your fantasies ? > and if you use solar power to charge them up, it's free energy. Damn you're an ignorant prick of the first order. Use the same cutesy 'solar energy' in EVs and you'll easily go *TWICE* as far - probably more since EVs can reclaim energy by regenerative braking. Graham |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Compressed Air powered, zero emission cars - for $6.5K each | RH | Technology | 255 | October 20th 06 06:07 PM |
Compressed Air Powered, zero emission cars | Rodan | Technology | 1 | October 12th 06 11:48 PM |
jet-powered VW-BUG, I want one now ! | [email protected] | VW water cooled | 6 | May 29th 06 03:44 PM |
Car runs on compressed air | laura bush - VEHICULAR HOMICIDE | Driving | 40 | May 12th 06 10:16 PM |
jet-powered VW-BUG, I want one now ! | [email protected] | VW air cooled | 3 | May 8th 06 04:38 PM |