Just curious, I'm not transferring any gases. I was just watching the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the gas
from the full one flows into the empty one. As the gas starts to fill
the empty cylinder it cools enough that it liquifies and rains into
the cylinder. But once the pressure equalizes the rain stops and the
end result is that both cylinders are at the same pressure but that
the originally full cylinder will have more liquid in it.
Here's the second situation: Everything is the same except the
empty cylinder is much larger than the full one, maybe ten times as
much volume. Once the pressure is equalized between the two cylinders
will the much larger cylinder now have more liquid than the smaller
one? I think it will.
Thanks,
Eric

wrote:

Just curious, I'm not transferring any gases. I was just watching the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the gas
from the full one flows into the empty one. As the gas starts to fill
the empty cylinder it cools enough that it liquifies and rains into
the cylinder. But once the pressure equalizes the rain stops and the
end result is that both cylinders are at the same pressure but that
the originally full cylinder will have more liquid in it.
There are commerically-available cylinder heaters to empty one cylinder into
another. works with anything that is partially liquid at room temperature
and elevated pressure. You have to weigh the cylinder that is being filled
to make sure it is not OVERfilled.

Jon

wrote in message ...

Just curious, I'm not transferring any gases. I was just watching the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the gas
from the full one flows into the empty one. As the gas starts to fill
the empty cylinder it cools enough that it liquifies and rains into
the cylinder. But once the pressure equalizes the rain stops and the
end result is that both cylinders are at the same pressure but that
the originally full cylinder will have more liquid in it.
Here's the second situation: Everything is the same except the
empty cylinder is much larger than the full one, maybe ten times as
much volume. Once the pressure is equalized between the two cylinders
will the much larger cylinder now have more liquid than the smaller
one? I think it will.
Thanks,
Eric
========================================

As the higher pressure gas flows into the second cylinder that cylinder will
warm up from the heat of compression so I don't think there will be any
"rain". The first cylinder will cool from the heat of evaporation as liquid
evaporates to replenish the head pressure. Once the tank pressures and
temperatures equalize any liquid will stay where it is, since to make it
move you have to supply heat of evaporation to the liquid to make vapor, and
remove that same amount of heat to condense vapor where you want the liquid
to end up. Cylinder volumes only matter in the time to reach thermal
equilibrium.

--
Regards,
Carl Ijames

wrote in message
...
Just curious, I'm not transferring any gases. I was just watching
the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the
gas
from the full one flows into the empty one. As the gas starts to
fill
the empty cylinder it cools enough that it liquifies and rains
into
the cylinder. But once the pressure equalizes the rain stops and the
end result is that both cylinders are at the same pressure but that
the originally full cylinder will have more liquid in it.
Here's the second situation: Everything is the same except the
empty cylinder is much larger than the full one, maybe ten times as
much volume. Once the pressure is equalized between the two
cylinders
will the much larger cylinder now have more liquid than the smaller
one? I think it will.
Thanks,
Eric

http://physics.bu.edu/~duffy/py105/Heat.html
Good luck wading into Thermodynamics. I had less trouble with Quantum
Mechanics.
-jsw

On Fri, 16 Feb 2018 16:05:28 -0500, "Jim Wilkins"
wrote:
wrote in message
...
Just curious, I'm not transferring any gases. I was just watching
the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the
gas
from the full one flows into the empty one. As the gas starts to
fill
the empty cylinder it cools enough that it liquifies and rains
into
the cylinder. But once the pressure equalizes the rain stops and
the
end result is that both cylinders are at the same pressure but
that
the originally full cylinder will have more liquid in it.
Here's the second situation: Everything is the same except the
empty cylinder is much larger than the full one, maybe ten times
as
much volume. Once the pressure is equalized between the two
cylinders
will the much larger cylinder now have more liquid than the
smaller
one? I think it will.
Thanks,
Eric


http://physics.bu.edu/~duffy/py105/Heat.html
Good luck wading into Thermodynamics. I had less trouble with
Quantum
Mechanics.
-jsw

There's a lot of compressed gas that shoots out of Ed Huntresses ass
and get trapped under his **** dress.

Then when he sashays through our newsgroup trolling for gay sex, the
fumes leak out from under his **** dress.

The mixture of his ass fumes combined with his already awful ****
fumes is quite the nasty combination. As soon as anyone spots him
doing pirouettes in his **** dress, we try to extinguish all flames,
just on case.

There's an alarm that hours off that sounds like this...

"ED HUNTRESS THE CROSS-DRESSING, CROSSPOSTING, GAY, FAG, PEDOPHILE
**** IN A DRESS IS HERE TROLLING FOR GAY SEX AGAIN!"


"ED HUNTRESS THE CROSS-DRESSING, CROSSPOSTING, GAY, FAG, PEDOPHILE
**** IN A DRESS IS HERE TROLLING FOR GAY SEX AGAIN!"


"ED HUNTRESS THE CROSS-DRESSING, CROSSPOSTING, GAY, FAG, PEDOPHILE
**** IN A DRESS IS HERE TROLLING FOR GAY SEX AGAIN!"

Everybody knows the drill and takes appropriate action.

On Fri, 16 Feb 2018 15:40:48 -0500, "Carl Ijames"
wrote:

wrote in message ...

Just curious, I'm not transferring any gases. I was just watching the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the gas
from the full one flows into the empty one. As the gas starts to fill
the empty cylinder it cools enough that it liquifies and rains into
the cylinder. But once the pressure equalizes the rain stops and the
end result is that both cylinders are at the same pressure but that
the originally full cylinder will have more liquid in it.
Here's the second situation: Everything is the same except the
empty cylinder is much larger than the full one, maybe ten times as
much volume. Once the pressure is equalized between the two cylinders
will the much larger cylinder now have more liquid than the smaller
one? I think it will.
Thanks,
Eric
========================================

As the higher pressure gas flows into the second cylinder that cylinder will
warm up from the heat of compression so I don't think there will be any
"rain". The first cylinder will cool from the heat of evaporation as liquid
evaporates to replenish the head pressure. Once the tank pressures and
temperatures equalize any liquid will stay where it is, since to make it
move you have to supply heat of evaporation to the liquid to make vapor, and
remove that same amount of heat to condense vapor where you want the liquid
to end up. Cylinder volumes only matter in the time to reach thermal
equilibrium.
Greetings Carl,
I forgot about the empty cylinder heating up. But if it is large
enough I still think some gas would liquify before the tank heated up
too much. There must be a mathematical way to figure it out. I might
need to do a little research.
Eric

wrote in message
...
On Fri, 16 Feb 2018 15:40:48 -0500, "Carl Ijames"
wrote:

wrote in message ...

Just curious, I'm not transferring any gases. I was just watching
the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the
gas
from the full one flows into the empty one. As the gas starts to
fill
the empty cylinder it cools enough that it liquifies and rains
into
the cylinder. But once the pressure equalizes the rain stops and the
end result is that both cylinders are at the same pressure but that
the originally full cylinder will have more liquid in it.
Here's the second situation: Everything is the same except the
empty cylinder is much larger than the full one, maybe ten times as
much volume. Once the pressure is equalized between the two
cylinders
will the much larger cylinder now have more liquid than the smaller
one? I think it will.
Thanks,
Eric
========================================

As the higher pressure gas flows into the second cylinder that
cylinder will
warm up from the heat of compression so I don't think there will be
any
"rain". The first cylinder will cool from the heat of evaporation
as liquid
evaporates to replenish the head pressure. Once the tank pressures
and
temperatures equalize any liquid will stay where it is, since to
make it
move you have to supply heat of evaporation to the liquid to make
vapor, and
remove that same amount of heat to condense vapor where you want the
liquid
to end up. Cylinder volumes only matter in the time to reach
thermal
equilibrium.
Greetings Carl,
I forgot about the empty cylinder heating up. But if it is large
enough I still think some gas would liquify before the tank heated
up
too much. There must be a mathematical way to figure it out. I might
need to do a little research.
Eric

Did you read the reference I gave you to latent and specific heat
calculations?

-jsw

On 2/17/2018 12:45 PM, wrote:
On Fri, 16 Feb 2018 15:40:48 -0500, "Carl Ijames"
wrote:

wrote in message ...

Just curious, I'm not transferring any gases. I was just watching the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the gas
from the full one flows into the empty one. As the gas starts to fill
the empty cylinder it cools enough that it liquifies and rains into
the cylinder. But once the pressure equalizes the rain stops and the
end result is that both cylinders are at the same pressure but that
the originally full cylinder will have more liquid in it.
Here's the second situation: Everything is the same except the
empty cylinder is much larger than the full one, maybe ten times as
much volume. Once the pressure is equalized between the two cylinders
will the much larger cylinder now have more liquid than the smaller
one? I think it will.
Thanks,
Eric
========================================

As the higher pressure gas flows into the second cylinder that cylinder will
warm up from the heat of compression so I don't think there will be any
"rain". The first cylinder will cool from the heat of evaporation as liquid
evaporates to replenish the head pressure. Once the tank pressures and
temperatures equalize any liquid will stay where it is, since to make it
move you have to supply heat of evaporation to the liquid to make vapor, and
remove that same amount of heat to condense vapor where you want the liquid
to end up. Cylinder volumes only matter in the time to reach thermal
equilibrium.
Greetings Carl,
I forgot about the empty cylinder heating up. But if it is large
enough I still think some gas would liquify before the tank heated up
too much. There must be a mathematical way to figure it out. I might
need to do a little research.
Eric

Â* But you're wrong , Eric . Propane acts as a refrigerant gas , and is
in fact used as such in some places . The thing to remember is that as
the liquid propane enters the empty cylinder it expands - and boils some
off - and chills the empty bottle . The inlet valve acts as an expansion
valve , just as in a cooling system . That chilling effect is why we can
fill small bottles from bigger ones - but it must be done with a bottom
or liquid tap into the big tank so it supplies liquid propane only . We
used to fill Dad's camper tanks this way from the big tank that fed our
house before we got natural gas .

--
Snag
Ain't no dollar sign on
peace of mind - Zac Brown

On Sun, 18 Feb 2018 07:16:17 -0600, Terry Coombs
wrote:

On 2/17/2018 12:45 PM, wrote:
On Fri, 16 Feb 2018 15:40:48 -0500, "Carl Ijames"
wrote:

wrote in message ...

Just curious, I'm not transferring any gases. I was just watching the
guy fill our propane cylinder and it got me to wondering.
Here's the first situation: Let's say I have two gas cylinders of
equal size. One is filled with a gas that is liquid at room
temperature when compressed, the other is empty. The cylinders are
upright. Now the cylinders are connected with a pipe so that the gas
from the full one flows into the empty one. As the gas starts to fill
the empty cylinder it cools enough that it liquifies and rains into
the cylinder. But once the pressure equalizes the rain stops and the
end result is that both cylinders are at the same pressure but that
the originally full cylinder will have more liquid in it.
Here's the second situation: Everything is the same except the
empty cylinder is much larger than the full one, maybe ten times as
much volume. Once the pressure is equalized between the two cylinders
will the much larger cylinder now have more liquid than the smaller
one? I think it will.
Thanks,
Eric
========================================

As the higher pressure gas flows into the second cylinder that cylinder will
warm up from the heat of compression so I don't think there will be any
"rain". The first cylinder will cool from the heat of evaporation as liquid
evaporates to replenish the head pressure. Once the tank pressures and
temperatures equalize any liquid will stay where it is, since to make it
move you have to supply heat of evaporation to the liquid to make vapor, and
remove that same amount of heat to condense vapor where you want the liquid
to end up. Cylinder volumes only matter in the time to reach thermal
equilibrium.
Greetings Carl,
I forgot about the empty cylinder heating up. But if it is large
enough I still think some gas would liquify before the tank heated up
too much. There must be a mathematical way to figure it out. I might
need to do a little research.
Eric

* But you're wrong , Eric . Propane acts as a refrigerant gas , and is
in fact used as such in some places . The thing to remember is that as
the liquid propane enters the empty cylinder it expands - and boils some
off - and chills the empty bottle . The inlet valve acts as an expansion
valve , just as in a cooling system . That chilling effect is why we can
fill small bottles from bigger ones - but it must be done with a bottom
or liquid tap into the big tank so it supplies liquid propane only . We
used to fill Dad's camper tanks this way from the big tank that fed our
house before we got natural gas .
What carl says is correct and what you say is correct. As the gas
boils off it cools. The heat from the cooled gas has to go somewhere
so it heats up the cylinder the gas is expanding into. So I think what
happens if the empty cylinder is much larger than the full one is that
the gas will chill and condense and rain into the empty cylinder until
the increased pressurizitation of the cylinder heats it up enough to
stop the gas from condensing. I wonder when that happens?
Eric

On Sun, 18 Feb 2018 14:20:21 -0500, Ed Huntress
wrote:
On Sun, 18 Feb 2018 11:54:32 -0700, Winston_Smith
wrote:


The comedy duo of Ed and Red flapping their collective gums about
compressed gas - just too precious for words.


I never said a word about it, you dingbat. I just pointed out where
the real discussion is going on.



If we could collect the hot air and methane from the BS, there
would
be no energy problem.


You could keep a five-man gondola aloft all by yourself.




On Sat, 17 Feb 2018 16:48:42 -0500, Ed Huntress wrote:
If you want to engage that conversation, it's being held in
rec.crafts.metalworking.

Without your feud, it is very much on-topic in alt.survival.


You only found out about it because Pecker used it as an opportunity
to spread his juvenile slurs.


But if I wanted an authoritative answer, I would have brought it up
in
RCM, if it were me. I don't have much confidence in "survivalists"
who
don't comment on magical .410 shotguns or who have the foresight to
pack an AR-7 in their bugout bag but who forget lighters and
matches,
and wonder about relying on a firebow.


You have no common sense.


--
Ed ****rdess

Another **** in a dress lie and troll. This thread only showed up in
alt.survival because you posted it here.

Go back to RCM, Iggy's waiting to shove his cock down your throat,
you stank nasty **** in a dress.

Go back to RCM.There are no children here for you to molest you
****ing **** in a dress. Go home already,you troll.