Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-L] compressed gas



On 12/07/2013 01:34 PM, Carl Mungan wrote:
So yes, it's between zero and one-tenth. But much closer to zero than
to 1/10. I'm surprised.

I betcha there are cooling fins on the back of the compressor.
The manufacturer doesn't want the compressor to run at 3000K.

Possibly constructive suggestion: Get a length of high-pressure
metal tubing, coil it up nicely, and submerge it in ice water.
Put that in series with the rest of the fill plumbing, in the
obvious way.

Given that they're spending 20 minutes filling the tank, it
shouldn't take too awfully much tubing. If you decide you
want more cooling, add more tubing in /parallel/ not series.
That takes some fittings, but parallel works better than
series:
-- less impedance per unit surface area
-- small diameter high-pressure tubing is muuuuch cheaper
than large diameter.

If you manage to achieve too much cooling, it's super-easy
to /underfill/ the cylinder, and let it warm up overnight
to the desired nominal pressure and temperature.