Explanation: Sigh! I told you so!
Liquid nitrogen costs $0.o6c per liter in bulk...
How much does 1 liter of liquid Nitrogen cost? [wiki.answers.com]
The Price of Nitrogen (2007) [hypertextbook.com]
One liter of nitrogen can be bought for six cents if by the truckload, or a dollar or two in exceptionally small quantities.
It's actually cheaper to produce than bottled water.
Liquid nitrogen expands about 22 x its volume... so 1ltr liquid nitrogen expands to fill 22 litres of space with final pressure of 1bar [15psi
Liquid Nitrogen: A question or two. [sciforums.com]
By Crisp 06-04-04, 05:02 AM
When we take 1 litre of Liquid nitrogen and place it in a pressure vessel made of steel and seal this vessel, so that the vessel contains just Liquid
Not a good idea. See below.
Does the vessel feel cold on the outside?
Yes. Steel and iron are very good heat conductors (usually good electric conductors are also very good heat conductors). This means that the steel is
very good at taking energy in the form of heat from the outside and porting it to the liquid nitrogen. When you touch the vessel with your hand,
energy from your fingertips is dissipated (i.e. your fingertip is cooled) and it is this sensation that makes you feel "cold".
Does the liquid Nitrogen remain at it's quantity even though the vessel is cold?
No. The room (the environment) is at roomtemperature, let's say 20°C. This is quite a bit higher than the freezing temperature of nitrogen, which is
at 77 K or -196°C. Heat from the room will dissipate through the (nicely conducting) steel to the nitrogen, heating it up and evaporating it. The
result will be quite disasterous: if you sealed the steel box, it will explode after a while, because 1 liter of liquid nitrogen will expand to about
22 liters of nitrogen gas.
The total amount of nitrogen is conserved (gas + liquid).
So now we have a hypothetical car that runs on liquid nitrogen...
It has a 1000cc motor and is a V2 engine configuration with 2 x 500cc capacity pistons and a 350 liter tank [1mtr x 1mtr x 35cm = 350 liters [20ltrs
above max fill of 330ltrs]
Assume the vehicles mass is not an issue and neither is grip etc for the time being as this is a hypothetical so far.
Now say each liter was applied individually to the engine and ran from 22 Bar down to 1 bar befor next liter was applied.
Say that once up to speed [important consideration overlooked now for ease of discussion currently] each 1 bar [1liter of liquid nitrogen boiled off
from 22 bar down to 1 bar in 1 bar increments] of aplied 'Gas' moves what ever mass vehical 50 meters down the road with up to 2 bar in losses [about
10% per 1km traveled] then each 1litre of liguid 'gas' will transport the contents [assumed at max carry mass] and the vehicle 1km in distance.
Now with 330liter max fill tank [350ltrs total at 20-22bar aprox.. glossing over many technical details here ok] thats 330 x $0.06 = $19.80 + say a
20c fee tax charge whatever for nice round $20.oo figure.
Say 300 km max distance with all loses considered in a back of the envelope calculation. So rounding down and being conservative ok.
Thats less than $70.oo per 1000km
or $0.o7c per 1km aprox.
Now whats petrol /per liter in USA?
Oh darn gallons...1 sec...
Units Convertion. Gallons to Liters [google.com.au]
1 US gallon = 3.78541178 liters
Average size petrol tank in USA is 16 gallons!
How many gallons does the average gas tank hold? [answers.yahoo.com]
Auto manufacturers in the US tend to size the fuel tanks in their cars to achieve at least 300 miles per tank under normal city/highway
So depending on the average fuel economy (MPG), a smaller car may have a 12 gallon tank, whereas a mid-size car is likely 16, and a larger SUV might
be 20+. On average, I would say 16 gallons.
16 x 3.78541178ltrs = 61 liters rounded up
Thats so those who use the S.I. system of units has an easier time doing their own maths...
16 x $5.00 [lowest estimate of petrol/gas cost per gallon as seen on a recent ATS thread] = $80.oo /tank
16 x $5.40 [highest estimate of petrol/gas cost per gallon as seen on a recent ATS thread] = $90.oo [rndup] /tank
300 miles is = 482.8km [rndup to 500km for ease of maths and conservativeness etc]
requiers 2 full petrol tanks to go 1000km = 2 x $80.oo [conservative choice again erring on side of caution etc]
= $160.oo for full 1000km journey.
Now we divide $160.oo [petrol] cost by $70.oo [liquid nitrogen] cost and get ... 2.286 [rndup].
So even if my liquid nitrogen [including all conservative elements etc] was double ineffective it would still beat petrol in cost by 0.25 x better in
cost for distance covered.
I hope you enjoyed this dish of cold revenge as I blew off steam and hot air!
Here is why...
Hey Presto! Out of Thin Air! A magical new currency and economy! (by OmegaLogos posted on
8-9-2010 @ 05:30 AM ) [ATS]
Personal Disclosure: Please search ATS and or Google etc for air powered cars and report back here if your seriosuly interested and post so we can
P.S. Now don't forget THAT I told u so!
edit on 27-2-2011 by OmegaLogos because: Edited to add some spaces .soz