This standard contains the rules and reference values for the green house gas (GHG) and energy balance calculation for biomass. With the GHG calculation the fossil green house gasses coming from fossil fuels used for producing the biomass are calculated. Comparing it against a reference value for the fossil fuel (mix) that the biomass is to replace, in order to decrease the amount of fossil GHG, the balance needs to be positive and above a given value. With the energy balance the total fossil energy used for production and transport of the biomass is subtracted from the final green power produced by the biomass. The result has to be positive, and in some countries only credits are given on this result of the green power minus the fossil fuel used for production and transport.
The aim of this document is to provide lean, simple, accurate and open (with clear reference to all the values used and the origin) GHG and Energy calculations.
Unless stated otherwise, the calculation is done with data collected over an annual period. This standard and reference values are based on net calorific value (lower heating value) at constant pressure. When the calculation uses typical factors on constant volume, net calorific value at constant volume may be used. The report should in that case include a an explanation and source reference.
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