Energetic characteristics of green chips made of branches of wood species Populus deltoides clone Cifra grown on plantations

In this contribution, there are presented the results of determination of energetic characteristics of green chips of wood species Populus Deltoides clone Cifra such as: share of bark in chips, elementary chemical composition of chip combustible, volume of ashes in dry mass of bio-fuel and lower heating value of bio-fuel in dry state. Green chips made of branches of wood species grown on plantations: Populus Deltoides clone Cifra consists of juvenile wood and juvenile bark. The share of juvenile bark in analysed green chips XB = 43,41 ± 3,76 %. The chemical composition of the combustible of green chips consists of: Cdaf = 49,69 %, Hdaf = 5,82 %, Odaf = 43,96 % and Ndaf = 0,53 %. The combustible of green chips does not differ from the chemical composition of combustible of fuel wood except for nitrogen, whose value is 3 times higher, than the amount of nitrogen in fuel wood. The share of ashes from green chips produced from branches of trees of fast growing wood species: Populus Deltoides clone Cifra, determined by form of weighted mean of the content of ash in juvenile wood, juvenile bark and the share of bark in chips is Ad = 2,49 %, which is 3,5 to 5,0 times higher value, than the value of share of ash from broad-leaved wood species. The lower heating value of subjected chips in dry state is Qn = 17 507 kJ.kg-1. This value is, in comparison with the lower heating value of wood of broad-leaved wood species shown in EN 14 961 Solid bio-fuels – Specification and classes of fuels, lower by 4,5 % .