# Vacuum an aluminum tank as a function of volume of change

1. Sep 11, 2012

### abe_cooldude

Hi all,

I am working on thermodynamics problems, and can't even seem to figure out how to start it.
I came across a scenario in which an 100gallon aluminum horizontal half-filled diesel fuel tank imploded because the vent was plugged. I know the basic concept behind the happening, i.e. pressure differential exerted a force on the tank causing it to crush. Since the vent was plugged, I am assuming it created vacuum in the tank, so the maximum pressure on the outside of the tank would have been 14.7psi. Am I right?

Now I am trying to do some detailed calculations to see how much pressure would be required to implode the tank sitting outside in ambient conditions if the vent was plugged and the volume of diesel inside the tank was decreasing. So pressure as a function of volume change of diesel inside the tank. I am getting confused because I would have to take into account diesel vapor pressure inside the tank, temperature change, etc, and since it won't be an ideal gas situation, I can't use pV=nRT.

Can anyone get me started?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution