What temperature does propane stop flowing?
Getting a tad nippy out, living here in the TT. Supposed to get down to minus 32C tonight. (about -25.6F) Cooking dinner just now, oven on baking some salmon, furnace trying to keep this thing w...
Forum Discussion
What temperature are you at? Yep that is cold enough, just your luck.
There is a propane pressure temperature chart, it is R-290. Yes a refrigerant.
Here is a place to find it's pressure at various temperatures.
http://www.engineeringtoolbox.com/propane-butane-mix-d_1043.html
So it looks like -44 and the pressure will be 0 PSI. However recall that you will be boiling the propane inside a tank, so if it is -20 outside, then the tank can reach -44, depending on the speed that you are using the propane from the tank. The slower that you are going to consume propane, the closer you can get to -44 and still have it boil faster than the tank gets cold.
If you can rotate tanks, and keep one inside for a while, you will be able to increase it's pressure, and thus have one ready to take outside and hook it up around midnight. (yes thanks for knowing that).
If you are collecting a lot of ice on the tank, the ice will help insulate the tank from the heat outside, and make the pressure even lower. Putting the tank into a warm sink full of water is what I have to do when I empty a R-22 freon tank as a vapor into a air conditioner. It will also increase the tank pressure in your case. You would need a bucket slightly larger in diameter than the 30# tank, and then fill it with some hot water, let it soak a while (inside the RV where it will not freeze or lose to much more heat to the outside.)
Fred.
There is a propane pressure temperature chart, it is R-290. Yes a refrigerant.
Here is a place to find it's pressure at various temperatures.
http://www.engineeringtoolbox.com/propane-butane-mix-d_1043.html
So it looks like -44 and the pressure will be 0 PSI. However recall that you will be boiling the propane inside a tank, so if it is -20 outside, then the tank can reach -44, depending on the speed that you are using the propane from the tank. The slower that you are going to consume propane, the closer you can get to -44 and still have it boil faster than the tank gets cold.
If you can rotate tanks, and keep one inside for a while, you will be able to increase it's pressure, and thus have one ready to take outside and hook it up around midnight. (yes thanks for knowing that).
If you are collecting a lot of ice on the tank, the ice will help insulate the tank from the heat outside, and make the pressure even lower. Putting the tank into a warm sink full of water is what I have to do when I empty a R-22 freon tank as a vapor into a air conditioner. It will also increase the tank pressure in your case. You would need a bucket slightly larger in diameter than the 30# tank, and then fill it with some hot water, let it soak a while (inside the RV where it will not freeze or lose to much more heat to the outside.)
Fred.
