Diesel - Volumetric - Temperature differences 2

[johncl1]

I am trying to determine how to calculate tank volume differences. If I load 1,000,000 litres diesel @ +15 degrees Celsius and the temperature drops to -40 degrees C, assuming no loss through extraction etc. what will my volume be. How do I calculate this?
Thanks

 

[jmw]

Taking your question at its most literal, download the density spreasheet from this page (

http://www.viscoanalyser.com/downloads.html)

and you can calculate the density at -40degC. Then you can recalculate the volume.
However, does the tank geometry change?
Do you need to allow for stratification?
Are the tank contents homogenous? Diesel is not blended for a particular density so different batches of diesel delivered into the tank may have significantly different densities and may stratify.


JMW

http://www.viscoanalyser.com

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[TD2K]

If someone at your company has a copy of the GPSA engineering data books, look in the physical property section. they have curves to adjust the density of various hydrocarbons as a function of temperature.

The key question is: how precise and accurate of an answer do you need?

 

[johncl1]

I don't need a super high level of accuracy for this application, but within standard scientific error would be nice! (Is that 2%???)

 

[TD2K]

thread481-82117

I downloaded the spreadsheets mentioned in one of the posts, it should give you what you are looking for I believe.

 

[danthemeterman]

I recently ran into a situtation where a service company entered the wrong COE for L. P. G. on an elec. meter so had to figure a product loss for the customer. I used the following formula Note; the Coe i used was for HD5 propane, with a spec. grav. of .505. you will ned to use a COE for fuel oil which is approx. .000025/Gal/oF. also you'll need the COE of the tank. This will help get you in the ball paBase temperature ie: (60oF) minus product temp. x c.o.e. factor ie.00165) + 1 x Prover Volume

Ex. 1 60oF (base temp) minus 65oF (prover or product temp) x c.o.e. .00165 + 1 x prover volume (100.15) = 99.32

Ex. 2 60oF minus 20oF x .00165 + 1 x 100.15 = 106.76

Ex. 3 60oF minus 65oF x .0015 + 1 x 100.15 = 99.40

Ex. 4 60oF minus 20oF x .0015 + 1 x 100.15 = 106.16

Warning: Notice the difference @ 20oF between C.O. E. .0015 &
.00165 for just 100 gals. It is +.70 gallons (400%?!! more than PEI standards) , or meter would be in the customers favor by 7 gallons/1000, or 700 gallons for every 100,000 gallons. Be sure you know the correct C.O. E. for the product being tested. 20oF was used as an average do the fact the author believes in the upper midwest it is the average delivery temp. If your records show a colder/warmer average you can use the same formula.
For electronic meters with setup for linear S & linear F, carefully chooose the proper table and linear setting.
glm: Dan Gunn

Continued for deliveries closer to 0 oF:

Ex. 5 60 oF minus 1oF x .00165 + 1 x 100.15 = 109.90

Ex. 6 60 oF minus 1oF x .0015 + 1 x 100.15 = 109.01
Notice at 1o F a meter will not register approx. .90%, 0r 27 gallons for every 3,000 gallons deliveried when the C.O.E is set at .0015 instead of .00165 (the right coe for propane).

rk.