Volume Correction for Kerosene

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Curiousinthephilippines Member Join Date: Jun 2009 Posts: 8	Volume Correction for Kerosene 06/19/2009 9:04 PM
	When we receive kerosene delivery, the volume is measured using the difference in height measurement using a dipstick and volume chart issued by the supplier which gives the corrected volume based on the accepted sg for 15 degrees centigrade. During dispensing, the ambient temperature is 30 degrees centigrade, a volume based on the formula amount of kerosene in kilograms is computed using a specific gravity which should be based on what temperature?
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#2 "Re: Volume Correction for Kerosene" by kudukdweller9 on 06/21/2009 1:36 AM (score 3)

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#3 "Re: Volume Correction for Kerosene" by Ried on 06/21/2009 2:44 PM (score 1)

dkwarner Guru Join Date: May 2006 Location: Placerville, CA (38° 45N, 120° 47'W) Posts: 6215 Good Answers: 248	#1 Re: Volume Correction for Kerosene 06/21/2009 1:22 AM
	Based on the temperature of the kerosene being delivered, which may be quite different from the ambient temperature, depending on time of day, distance from source, means of storage and transport, etc. If you buy by the kg, rig some kind of device to directly or indirectly measure the weight of the tank and its contents. __________________ Teaching is a great experience, but there is no better teacher than experience.
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kudukdweller9 Guru Join Date: Jan 2009 Posts: 1011 Good Answers: 25	#2 Re: Volume Correction for Kerosene 06/21/2009 1:36 AM
	The difference in volume is determined by the temperature of the fuel and the coefficient of expansion associated with the type and density of fuel that result in a Volume Correction Factor (VCF) that would be some fraction either greater or less than one. These VCFs are then applied to average retail prices as part of the initial step to quantify potential consumer benefits. The chart is a standard correction for temperature and specific gravity of the fuel. It uses an average of yearly temperature in the area where the fuel is dispensed. For example, Hawaii uses a higher temperature on their compensation chart. The Philippines should be using a chart that reflects their climate too. The 15 degrees C standard is for the 48 states. Not Hawaii or the Philippines. Do you think you are being shorted by receiving a volume of Kerosene rated at a certain sg and 15 C? I do. The lower temperature compensation means you get a smaller volume of fuel at a higher temperature.
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Ried

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Re: Volume Correction for Kerosene

06/21/2009 2:44 PM

SG	lb/cf @ 60F	lb/cf @80F	lb/cf @ 100
Water 1	62.4	62.2	62

Jet-A 0.8

49.9

49.8

49.6

Table I put together with I-P units for a project a couple of years ago. 0.3lb/CF divided by 49.8lb/CF indicates a volumetric change of 0.6% between 60F and 100F. Not exact but should be close to volumetric change between 15C and 30C.

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