6 replies to this topic

[rasprocess2026]

Hi.

How can I calculate the amount of propane loss (if any) from a spherical tank at site condition? 

 

Diameter, nominal / net capacity, operating/ design pressure & temperature and also physical properties and site conditions are known.

thanks a million

[breizh]

Hi,

Consider the link underneath with comments.

https://www.cheresou...ural-gas-tanks/

 

Breizh

[shvet1]

Is this storage refrigerated? Is C3 storage temperature controlled?

[Pilesar]

What losses are you suspecting and from what cause? I have six propane tanks at my home and do not expect any losses as long as the valves stay closed.

Propane liquid is typically stored in pressurized vessels at ambient temperature. The propane vapor that boils from the liquid inside the vessel provides the pressure. The vessel is designed to contain the vapor so there will be no loss of vapor normally and no venting should be needed. Once the pressure inside the vessel reaches about 200 psi (depending on the temperature) the vapor and liquid will be at equilibrium and the pressure will not increase further. Spherical tanks are often used in pressurized service because the stresses on the metal tank wall are distributed fairly evenly.when caused by the internal pressure. When you blow up a child's rubber balloon it is difficult to form a cube shape with it -- the balloon walls naturally want to be rounded. The spherical tank round walls allow the pressure to be contained without a lot of the extra metal that would be needed for a straight-sided vessel of the same volume..

[fallah]

Hi.

How can I calculate the amount of propane loss (if any) from a spherical tank at site condition? 

 

Diameter, nominal / net capacity, operating/ design pressure & temperature and also physical properties and site conditions are known.

thanks a million

 

Hi,

 

With fixed operating pressure, then you mean the loss due to ambient temperature variation through, say, a PV to flare network?

[rasprocess2026]

Hi.

First of all, I want to calculate how much heat is absorbed by an insulated spherical tank (containing propylene) from environment? and then  how much loss due to ambient temperature variation through, , a PV to flare network?

thanks a lot

Propylene is contained in saturation condition.

[Pilesar]

Whether it is propane or propylene in the tank, the pressure vessel should be adequately designed to contain all the hydrocarbon due to ambient temperature changes. Venting to flare will certainly cool the contents, but this would not be a normal practice. Is the tank underdesigned for the service? Do you know you are really venting to flare?