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Old 13-10-2007, 03:20 PM   #1
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Conversion Factor

Now I am back offshore and have started playing with the really big toys again. However, we have a small issue onboard:-

Does anyone know the conversion factor for transforming Cubic Metres of marine gas oil to metric tonnes?

Onboard here all our fuel measurements are made in Cubic Metres but on the current contract the client wants everything recorded in metric tonnes.

Have tried trolling through the internet but to no avail

Appreciate because we are dealing with marine gas oil there will be additional factors thrown in such as delivery temperature, density but all we are really looking for is a nominal value for billing reasons.

Any ideas
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Old 13-10-2007, 04:01 PM   #2
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What's the density of the oil?
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Old 13-10-2007, 05:12 PM   #3
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Matt

Following data received from bunker supplier:-

Tested Results Units DMA
-------------- ----- ---
Density @ 15C kg/m3 856.5 890.0
Viscosity @ 40C mm2/s 2.7 1.5\6.0
Water %V/V LT 0.1
Micro Carbon Residue 10% %m/m LT 0.10 0.30
Sulfur %m/m 0.18 1.50
Ash %m/m LT 0.01 0.01
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Old 13-10-2007, 10:38 PM   #4
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Someone posted a nice conversion diagram here a good while back...could have been Blufin.

Edit: Here's one but it's not the one I was thinking of.

Here.

I see you've got the density at 'Density @ 15C kg/m3 856.5 890.0' I guess that's a range of 856.5 to 890.0kg per cubic metre so that would be 1 metric tonne = 1.1675 to 1.1236 cubic metres. Or 1cubic metre = 0.8565 to 0.890 tonnes. I think....

Your data is interesting cos we had a thread on Ribnet a while back where I reckoned there was a fair amount of water contained in diesel and recently I changed a diesel filter and the residue was just like fine carbon dust similar to what you get in diesel engine oil. Your data gives figures for both water and carbon residue.
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Old 14-10-2007, 12:24 PM   #5
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Originally Posted by jw. View Post
so that would be 1 metric tonne = 1.1675 to 1.1236 cubic metres. Or 1cubic metre = 0.8565 to 0.890 tonnes.

Correct.
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Old 14-10-2007, 05:24 PM   #6
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Phew...
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Old 14-10-2007, 06:32 PM   #7
Dave
 
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Thanks for your input Gents, its appreciated

Now I can start billing the client for the fuel we are burning out here and considering its around 50CuM a day it wont be a cheap bill
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