Compressed Air Car

[positronicle]

--Edited by Positronicle--

[Chris Smith]

Your not even close.

Energy moves the cylinder in the engine.

Steam, hot water, hot oil, or hot gas like CO is the medium that energy makes and uses to move the piston.

Energy is the mover, not lifeless 14.2 psi air.

Take away the energy and everything stops, even in the non compressed air engine.

If you don’t impart energy into the air, there is no motor function.

Even driving a compressed air car takes electrical or work type energy to pressurize the air, meaning electrical energy or physical energy moves the piston, not the air.

Still air is energy less for all intents and purposes.

[positronicle]

--Edited by Positronicle--

[Chris Smith]

Its exothermic heat that causes the expanding gas to form an energy wave that moves the piston.

Hot goes toward cold.

Air doesn’t impart anything on its own and unless you mix it in with energy to begin with you have nada, zero, zilch.

Air is not the force that makes things move, energy within the gas moves objects

[positronicle]

--Edited by Positronicle--

[ecerfoglio]

haklesup said:

Batteries don't last as long as air tanks. Weigh a lot more too.

I'm sure he was referring to the lifetime of the storage tanks vs the replacement rate of depleated batteries.

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Barring a puncture , the tank should last the life of the vehicle.

In Argentina we have lots of cars running on CNG (Compressed Natural Gas, or GNC as we say in spanish).

The gas tanks are filled up to 200 bars = aprox 2900 PSI.


And, used at that pressure, they have a limited lifetime, you have to change the tanks after some time.

[Chris Smith]

Natural gas and compressed air isn’t the same thing.

The isothermic energy is in the hydrocarbons, where as with compressed air it only contains the energy of compressed air pressure.

Probably around 1000:1 difference over compressed air.

The subject here is Compressed air engines.

They are just short of useless because they have very little energy from compressing plain air into a HP tank.

With out adding in the energy of exploding fuel, you have a novel toy.

Air, at room temperatures and pressures apply their force equally inside the engine and out side the block, exuding zero force to move a vehicle any where.

The sole energy contained in air is the mechanical force you apply to the air to compress it, which amounts to a drop in the bucket compared to burning HC’s of any type.

Energy is the only word here, and energy to move an object is hot moving towards cold.

Compressed air is used cold, and it is a simple force like a spring, and there are no spring powered cars because springs dont last but a few MM before they run out of energy and then you must place it all back into the spring using some other form of energy.

[positronicle]

--Edited by Positronicle--

[haklesup]

This link does a little better job. They use english units and give a better shot of the actual engine running on a dyno in a lab. They also have video of actual cars going far more than a few yards.

http://youtube.com/watch?v=gFbKINlXzRk& ... ed&search=

[Chris Smith]

A 50 kilo bottle of liquid oxygen was given to you earlier.

It contains the maximum amount of volumetric strokes a and those strokes don’t amount to any real time, and that’s liquid oxygen.

Compressed air is far less energy per cubic meter or kilo gram of tank weight.

the same amount of kilo for super caps or even some of the modern batteries will drive a car for a day, not minutes or even hours with LOX.

LOX is close to practical in some ways, other than sitting on a bomb and driving around.

Perhaps liquid nitrogen will be the next try?

And no compressors are allowed to be dragged behind the car for fill ups.

And we haven’t even gotten into the down falls of air and the temperature changes while using a gas. Then there is the manufacturing and engineering costs of all the associated parts needed to make air efficient, A.K.A. revising the entire design of the engine, and wear and tear in these turbine assemblies.

I suggest you start with a viable source of energy, say the lemon.

It contains more energy per pound.

Sawdust has lots of BTUs, vegetable oil, sugars, etc,.... but it doesn’t really matter because compressed air only contains the energy you put into it, so chose your exothermic reaction first, then waste that energy in your compresses air.

Burn wood and make steam, less problematic.

If your going to spin a turbine make electrons not compressed air, ....Its easier, cheaper, goes further, last longer.

[positronicle]

--Edited by Positronicle--

[Chris Smith]

Another math failure I can tell.

Time for you to do what any scientist, mathematician or engineer has to do.

Break out the math books.

You failed before your even engaged your brain.

Impossible is just that, the pipe dreams you draw off the web, and don’t forget the magnetic carburetor, 200 miles to the gallon.

Sorry, there are no free lunches in Physics, despite all your wishful thinking.

Naturally all you have presented is words, not backed up by a single thing because Im sure math makes you dizzy.

Compressed air is only worth the energy you squeeze into it, and thats not free, and still unfortunatly liquid is the limit you can squeeze into it and it is still too small to worry about.

Im sure they will come out with a LOX tanker just to go to the 7/11 and back.

[positronicle]

--Edited by Positronicle--

[Chris Smith]

Here is some 5 grade math for you.

How much air is there in a compressed air tank?
Start with 80 CF tank
How much does it weigh
At what pressure is it?
[how many atmospheres in one tank]

Running a 100 ci engine at these low pressures, how many rpms are there in one tank full of air, weighing almost 100#?

How many BTUs or Watts did it take to fill this tank?

Tell me the rpms and how many total RPMS are there in just one bottle at 100ci stroke.

If your too dizzy with this math, ask you kid to do it for you.

And don’t waste our time dodging the bullet here, you already did that on every single post you already placed here.

Step up to the plate or shut up.

That or ask a child, Im sure they know more than you.

[positronicle]

--Edited by Positronicle--