Volume expansion in an Underground storage tank
Volume expansion in an Underground storage tank
(OP)
I want to measure the expanion of a liquid in underground storage tank.
I have a magnetostrictive sensor in the tank, which has 5 temperature sensors equally spaced, which means the whole tank is divided into 6 zones, and i know temperature in each zone. So you guys have any suggestion as how should i apply temperature compensation,
1) apply temperature compensation for each zone i.e. for the liquid in that zone, since i know temperature in that zone, and add them together?
2) find avergae temperatue of the liquid, by seeing how many temperature sensors are inside the liquid, average the temperature, and apply temperature compensation in zones for the liquid using the avg temperature calculated.
3) find the average temperature for the entire liquid and apply temperature compensation as a whole.
any suggestions would be greately appreciated.
srikar





RE: Volume expansion in an Underground storage tank
At some point you get my law of measurement, measure it with a micrometer, mark it with a piece of chalk, cut it with an axe, is that an acurate enough cut?
I'd just average themps and find the 1 factor. number 3. I'd also throw out any temp you find more than 5% or 10% different as a spect reading.
If you wanted to be more acurate (and waste more time), you'd adjust the density for the pressure, the deeper it is the more dense it is. Then you should also adjust the capacity of the tank by is change in volume due to temperatur expansion.
RE: Volume expansion in an Underground storage tank
BUT...........
for example, we have diesel in zones 1,2 and 3.
and temperature in zone 1=62, zone 2=67, and zone 3 = 75,
so the average would be 68, it wouldnt make sense to assume liquid in zone 1, to expand to the volume at 68, since it is at 62.
similarly all others, does that make sense?
any comments?,
As you said density of the liquid also effects the volume expansion, where can i find information on this? any leads would be appreciated.
I am triyng to calculate the leak rate for a underground storage tank.
I have decided to neglect tank expansion.
RE: Volume expansion in an Underground storage tank
RE: Volume expansion in an Underground storage tank
I searched a lot but couldnt find any.
RE: Volume expansion in an Underground storage tank
RE: Volume expansion in an Underground storage tank
The API MPMS 11.1, do you guys know a place to download this for free, or for a nominal cost, beacuse its too expensive.
RE: Volume expansion in an Underground storage tank