LNG Densities and Energy calc for Pc

1. The GCV mass is calculated as follows for ideal gases: GCV mass =ΣXi *Mi* Hi / Xi *Mi where: Xi = molar fraction of component i, Hi (mol ) = molar gross calorific value of component i, expressed MJ/kg/mol, Mi = molecular weight of pure component i expressed in kg/mol.

2. The calculation is conducted based on the information and methodology available in ISO 6976, GIIGNL – LNG Custody Transfer Handbook 3 rd Edition, and Liquefied Gas Handling Principles on Ships and in Terminals 4th Edition (LGHP4).

3. In the last tab ‘Quantities’ if the volume of cargo is entered in m3 then the total energy of the cargo will be calculated, and you can use this data to determine the cargo cost based on unit price.

4. In the next tab ‘Heating value LNG’ the GCV will be automatically calculated for liquid and vapor including the Wobbe Index.

5. all of these products being in the gaseous state except for water, which is condensed to the liquid state at t.

6. The App may also be used to verify cargo surveyors figures or for educational purposes.

7. temperature to obtain the density for any other temperature.

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