H2/Natural Gas Blending Calculator
H2 LHV = 10.8 MJ/Nm³. NG specific gravity assumed 0.576 (typical North Sea); H2 SG = 0.0696. Wobbe Index calculated on LHV basis. CO2 saving vs 100% NG combustion at 56.1 kgCO2/GJ.
20%
⚠ >20% H2 - check appliance and burner compatibility before injection.
⚠ >30% H2 - formal engineering safety review required before grid injection.
Blend Properties
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Blend Calorific Value
MJ/Nm³ (LHV)
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Wobbe Index
MJ/Nm³
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H2 Energy Fraction
%
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H2 Mass Flow
kg/hr
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CO2 Saving
% vs 100% NG
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H2 Volume Flow
Nm³/hr
Energy Split : H2 vs Natural Gas
Stacked bar shows energy contribution by fuel at current blend percentage.