I NEED ASSISTANCE: Useable BTU's per Cubic Foot, and per Pound (weight)
On Behalf Of Daryl Oster
Sent: Friday, September 29, 2006 7:22 PM
> -----Original Message-----
> From: hhowderdIt is not always a release of energy, but energy can also be absorbed (as in
> Digging deeper into this problem of an exhaustive list
> of substances by useable BTU per cubic foot, I have ran
> into the proposition of "latent heat."
> For example, there is always a release of energy with
> a change of state -- gas to liquid to solid.
refrigeration cycles)-- exothermic (release of heat) OR endothermic
(absorption of heat) process.
> Also, there is a release of energy whenever the containmentAgain, usually the case -- but not always
> pressure is reduced.
> That may be of critical importance forCNG (compressed natural gas) is a viable transportation fuel, it is in wide
> any vehicle powered by compressed water, compressed air,
> or even the now popular (although I don't know why): compressed
> natural gas. I don't see that you could go very far on
> compressed natural gas if it was all brought on board pretrip,
> commercially. (Now, maybe compressing the natural gas exiting
> the passengers might be a more useful concept ! ! Is that
> what they are doing ? )
spread use in China -- most of the taxis in Chengdu run on CNG, as do
hundreds of busses in CA. LPG (propane) is also a viable motor fuel in
widespread use (many thousands of forklifts for example). Unfortunately,
most do NOT recover the energy of compression (or the phase change energy --
in the case of propane, vehicle cooling could be enhanced due to the
endothermic process of propane vaporizing).
> For your further information, this got me to thinking aboutA thousand years ago it was warm enough to farm Greenland -- then global
> the ecology movements "global warming" project. I would suspect
> that the surface air temps might be rising everywhere as a
> result of increased dew falls, as a result primarily of increased
> release of minute particles from various volcanoes for the past
> twenty (20) years or so.
cooling put an end to a couple hundred years of Greenland AG -- it is still
too cold to farm Greenland as the Vikings did a thousand years ago. There
are many natural cycles, and harmonics of natural cycles that affect global
temperature much more than human factors do.
> For transport WHILE THE DEW IS FALLING -- maybe only twenty (20)The "energy per cubic foot" would be abysmal! Not likely to be practical.
> minutes , and at an uncertain time each day in some markets,
> there might be a chance to build and market a commercially viable
> transport vehicle powered by such a power source.
> Anyway, while awaiting the data for various useable BTU per cubicCompressed gas energy storage IS practical, and in use (I'll dig up some
> foot, I am going to turn to self-propelled transport, ie
> with the person being the power source. I am thinking that
> there might be some advantage to providing a way to "smooth"
> the effort, in contrast to the systems now, which require the
> rider to exert whatever energy is require at the moment.
> I rode a bicycle this week, and I can tell you from experience,
> that some of those are very tough moments ! ( And I HAD a 12 speed.)
> I was thinking maybe compressed air, or compressed water.
references for you if you are interested). Compressing water is NOT
practical (water is not very compressible) however, combining a compressed
gas, AND a hydraulic fluid (could be water -- but usually oil is used) in a
pressure accumulator, a very practical energy smoothing function can be
realized. Eaton (a major manufacture of hydraulic equipment) has patented
such a system for use on cars to recover braking energy. A hydraulic
accumulator is capable of storing more energy per unit of mass and volume
than the best batteries -- and will last longer too.
> Regardless of what is compressed, the people who probably know theMost of that heat is probably caused by energy losses of running a pump
> most about this is the maker of the SMEAL fire truck pumper.
> Is it proper for NewMobility to recruit stakeholders ? I am not
> certain about it, but , like I say, SMEAL should have something to
> contribute to any solutions we might come up with.
> For example, I understand from my local fireman, that the water
> temp in his fire engine is stored at 250 degrees, F. Most of that
> energy is the result of pumping it in at 100 psi, and holding it
> at maybe 300 psi.
without water flow to cool it-- not a direct result of compression.
> There is no need for us to repeat the mistakes of trams about ParisSteam engines are more sustainable than muscle powered transport, but less
> in a previous century where they tried to then put another fire
> onboard to INCREASE the pressure more. That idea was going
> BACKWARDS !
sustainable than Diesel powered transport.
> To my mind, the FORWARD direction is to do something like use thePumping oil to hydraulic accumulators is much more efficient (about 90%)
> tires to contain the stuff we would want under pressure. Maintain
> the pressure by dynamic braking going downhill, braking to stop,
> and exertion by those onboard. Have something to change the
> of the profile of the tire, independently both inside and out !
> (Would be easy to do with a computer control system onboard.)
than compressing air (about 70%).
> Should be able to get plenty of locomotion from all that forThe fastest sail "boat" sailed on frozen water at more than 150mph.
> a small vehicle. Name it "THE SCOOTER", from a historical
> predecessor they used to build in the midwest USA ( I think those
> even had a sail on them, and are reputed to be used to transit
> both water and ice.) ( ICE is good !) And for HIGH psi,
> the markets are probably NOT humid, so we are talking: Finland,
> Estonia, Poland, Saskatchewan, Minnesota, Wisconsin, Michigan, Russia,
> Lithia, Sudan (dropping the ice benefit), Cuiba Brazil, etc.
>The segway is an over-priced toy, a $180 electric scooter will do the same
> What is the name of that device presented last year on American TV ?
> I would think they made a mistake in not positioning the wheels in
> tandem. But I suppose their target was very smooth surfaces, only.
> I bet I would bounce right off of their platform in my surface
> environment !
job (except compensate for lack of self esteem).
> However, their "pole" to hold onto is probably necessary. In myrecent
> biking experience, I concluded after the third hour of transport,You should try out a recumbent bike -- defiantly designed for great sitting
> that the bike set is NOT for sitting -- it's purpose is to provide
> stability by having a fixed bar pass between your leggs ! The higher
> the more leverage I got ! No wonder that Tour de France winner had
> testicular cancer.
comfort (and much higher efficiency).
> All that seems to my mind very doable, within six (6) monthsIt IS being done now -- a few days ago a human powered vehicle went more
than 1000km in 24 hours.
> Relly, we can't use "friends" , either -- that is a term for....
> Republicans in the USA, Maybe Newt Gingrich started that via
> his "friends of Newt"
> howard finchMost of my friends are still friends in spite of most of them being
> copyright September the 29th, 2006
> all rights reserved by howard finch, USA ga tech class of 1966
> Karl Bevins, mentor
republicans and democrats.
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