LNG Gross Calorific Value - ISO 6976

Mass-based gross calorific value (HHV) of an LNG cargo from gas-chromatograph composition per ISO 6976:2016 - the reference method for invoice energy on LNG bills of lading.

LNGGCVCustody

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\text{GCV}_m = \sum x_i \cdot \text{GCV}_i^{mol}, \quad \text{GCV}_{kg} = \frac{1000 \cdot \text{GCV}_m}{\sum x_i M_i}

Symbol	Meaning	Unit
$x_i$	Mole fraction of component	mol/mol
$\text{GCV}_i^{mol}$	Molar GCV of pure component	kJ/mol
$M_i$	Molar mass of component	g/mol

Source: ISO 6976:2016; GIIGNL Custody Transfer Handbook

In short

Mass-based gross calorific value (HHV) of an LNG cargo from gas-chromatograph composition per ISO 6976:2016 - the reference method for invoice energy on LNG bills of lading.

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