LNG Calculations

By GSS Ops Team 21 January, Monday
Ship LNG EU covers ship's calculations in Metric units.

This program offers additionally COSTALD method to overcomes the limitations on the LNG composition which are applicable for Revised Klosek-McKinley formula.
You can use the Revised Klosek-McKinley method only if the LNG composition remains within the following limits:

             CH4 > 60% mol.
             iC4 + nC4 < 4% mol.
             N2 < 4% mol.
             Temperature < 115 K.

Moreover, Ship LNG EU program allows to use the Enhanced Klosek-McKinley method and the Enhanced COSTALD method for the calculation of the compressed density above the saturated pressure.
Blog

The program Ship LNG US which calculates in Metric units has the following list of cargo operations as shown on the picture below: Blog You can select in Ship LNG EU menu which standards and methods to use in ship's calculations: Blog You can select in Ship LNG EU from the drop-down list, which method of density calculation to use in ship's calculations:

  • RKM method (Revised Klosek - McKinley method, i.e. the method for the calculation of the density at the saturated pressure)
  • ERKM method (Enhanced Revised Klosek - McKinley method, i.e. the method for the calculation of the compressed density above the saturated pressure)
  • COSTALD (COSTALD method, i.e. the method for the calculation of the density at the saturated pressure)
  • Enhanced COSTALD (Enhanced COSTALD method, i.e. the method for the calculation of the compressed density above the saturated pressure)
  • Blog You can select in Ship LNG EU, Ship LNG EU Cal the standard to be used for the calculation of VCF of the liquid phase: Blog You can select in Ship LNG US from the drop-down list the way of the calculation of Molar mass: Blog You can also select in Ship LNG US from the drop-down list the Calorific value standard: Blog The method for the calculation of the Energy displaced can be selected from the drop-down list: Blog The method of conversion of MJ to MMBTU can be selected from the drop-down list: Blog The method of calculation of Mass Calorific Value can be selected from the drop-down list: Blog The Base temperature and pressure can be selected from the drop-down list: Blog The Base temperature for Molar and Mass Calorific value can be selected from the drop-down list: Blog The Base temperature for Volumetric Calorific value can be selected from the drop-down list: Blog As you can see, this programs has a lot of useful features designed to automate and facilitates LNG calculations.

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