Explanations:

Calculation of theoretical potential of biomass from perennial energy crops

Y_PEC =  A_PEC · 7

where:

Y_PEC – theoretical Perennial Energy Crops (PEC) yield (Mg/year, dry matter)

A_PEC – area of PEC (ha/year)

7 – average yield of grasses or Short Rotation Coppice (SRC) (Mg/(ha/year), dry matter)

Calculation of perennial energy crops energy value

Q_PEC = Y_PEC · LHV

where:

Q_PEC – energy potential of Perennial Energy Crops (PEC) (GJ/year)

Y_PEC – theoretical PEC yield (Mg/year, dry matter)

LHV – Lower Heating Value (18 GJ/Mg)