Dallas Cowboys Stadium Seating and Atmospheric CO2

wattsupwiththat.com ^ | 1/27/2014 | Anthony Watts

[Dan(9698)]

If it is 80% nitrogen and 20% oxygen, where are all the other gasses?

[Tenacious 1]

We used nitrogen in our race car tires.

How do you set the beads with pure nitrogen? I assume you have to "suck" all the oxygenated air out of the tire before you put pure nitrogen back in. Obviously this would unseat the tire beads.

I know they do it. But how? Curious.

[Tenacious 1]

Congrats! I just noticed you successfully hi-jacked a AWG thread. I even contributed. :o)

[Moltke]

The point is that pure nitrogen is “dry” - no water content - compared to plain old air. It’s the water content that drives pressure changes disproportionally with temperature changes - if the air compressor has a dryer it’s just as good.

[Tenacious 1]

The point is that pure nitrogen is “dry” - no water content - compared to plain old air. It’s the water content that drives pressure changes disproportionally with temperature changes - if the air compressor has a dryer it’s just as good.

I understand that point. I also understand the scam for passenger vehicles at tire shops. But for the race teams that do it (if they still do), how do they go about it?

[mountn man]

Set tire on rim, bleed some nitrogen into tire and use nitrogen to pop the tire and then fill with nitrogen. By the time the bead is set, some air has already been displaced by nitrogen. What air is left, is at atmospheric pressure, by the time usable tire pressure is achieved, the percentage of air to nitrogen is very small.

Dry air is made up of 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide.

By using compressed nitrogen, you're raising the nitrogen content to 98-99%. Also, air chemistry is affected by humidity.

[mvpel]

Scuba tank air is also dry, so you could probably get the same basic results from filling your tires with compressed air from a scuba tank as you do from filling with compressed pure nitrogen.

[spawn44]

CO2 was the POLITICAL PICK. The environmental leftists could never make it the warming catalyst for obvious reasons. That’s why they have had to MANIPULATE and CHERRY PICK the data, then lie like hell to advance their agenda. Next time you see Al Gore ask him if he knows the CO2 concentrations in the atmosphere.

[driftdiver]

Well that wasn’t my intent but thank you for your help. There seemed to be a connection there for me. Perhaps I was mistaken.

[Moltke]

But for the race teams that do it (if they still do), how do they go about it?

Just guessing here, but either filling the uninflated (atmospheric pressure) tire with N2 is "good enough" or they go through an inflate/deflate cycle with N2 until the moisture content is negligible (one cycle should be sufficient, IMO). Probably the former. It's not *that* big of an issue. You just don't want to press a lot of moist air into the tire.

[hecht]

exercise increases CO2. there should be a carbon tax on health clubs, sneakers and treadmills.

[JimRed]

Yeah, math is hard...Thanks for catching that boo-boo before I repeated it!

[rktman]

Not to mention a “special” tax on pro players that make HUGE salaries. It’s only fair. LOL!