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HOW DO YOU FIGURE DENSITY OF AIR WITH PHYSCO CHART

2. dx
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http://www.sp.uconn.edu/~mdarre/NE-1...ric_inset.html

Look at "specific volume" at the very end. Specific volume is 1/density.

3. The specific volume from the p-chart is for dry air only.

Its units tell you "cubic feet per pound of dry air"

The chart also gives specific humidity, and the units are "pounds of water per pound of dry air" or 'grains of water per pound of dry air" with a 7000 grains making a pound.

The specific volume gives how many cubic feet hold one pound of dry air, plus however much water. A specific volume given say '13.33 cubic feet per pound of dry air', tells you there is one pound of air in 13.33 cubic feet, but there is also water vapour in that 13.33 cubic feet.

If you want the true density of the moist air, then you need to add the mass of water vapour, the specific humidty to that one pound, then divide by the cubic feet in the specific volume.

4. I saw this thread title and thought of the line from "Back To The Future" where George McFly is at the soda fountain trying to get Lorraine to go out with him:

"Lorraine, you are my DENSITY!"

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Originally posted by shophound
I saw this thread title and thought of the line from "Back To The Future" where George McFly is at the soda fountain trying to get Lorraine to go out with him:

"Lorraine, you are my DENSITY!"

Awesome movie, the ones that followed sucked...

HELLO! Anybody in there? McFly?

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## Where, then?

Originally posted by hvac_czar
[B]
Is Superheat in New Mexico ?

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