12. Calculations
The calculation procedures contained in this Paragraph 12 are generally in accordance with the Institute of Petroleum Measurement Manual, Part XII, the Static Measurement of Refrigerated Hydrocarbon Liquids, Section 1, IP 251/76.
d = density of LNG loaded at the prevailing composition and temperature Tl in kg/m3, rounded to two (2) decimal places, calculated according to the method specified in Paragraph 12.1 of this Exhibit A.
Hi = gross heating value (mass based) of component “i” in MJ/kg, in accordance with Paragraph 12.6(a) of this Exhibit A.
Hm = gross heating value (mass based) of the LNG loaded in MJ/kg, calculated in accordance with the method specified in Paragraph 12.3 of this Exhibit A, rounded to four (4) decimal places.
Hv = gross heating value (volume based) of the LNG loaded in Btu/SCF, calculated in accordance with the method specified in Paragraph 12.5 of this Exhibit A.
K1 = volume correction in m3/kmol, at temperature Tl, obtained by linear interpolation from Paragraph 12.6(c) of this Exhibit A, rounded to six (6) decimal places.
K2 = volume correction in m3/kmol, at temperature Tl obtained by linear interpolation from Paragraph 12.6(d) of this Exhibit A, rounded to six (6) decimal places.
Mi = molecular mass of component “i” in kg/kmol, in accordance with Paragraph 12.6(a) of this Exhibit A.
P = average absolute pressure of vapor in an LNG Tanker immediately before loading, in millibars, rounded to a whole millibar.
Q = number of MMBtu contained in the LNG delivered, rounded to the nearest ten (10) MMBtu.
Tl = average temperature of the liquid cargo in the LNG Tanker immediately after loading, in degrees Celsius, rounded to one (1) decimal place.
Tv = average temperature of the vapor in an LNG Tanker immediately before loading, in degrees Celsius, rounded to one (1) decimal place.
V = the volume of the liquid cargo loaded, in cubic meters, rounded to three (3) decimal places.
Vh = the volume of the liquid cargo in an LNG Tanker immediately before loading, in cubic meters, rounded to three (3) decimal places.
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