Selected produce and energy characteristics from Populus x euroamericana clone MAX 4
2015
Lieskovský Martin
Biomass is one of the most effective renewable energy sources, with highest potential for future. Poplars are widely used to produce biomass for energy. This article presents the methodology and results of experimental testing of the calorific value and ash content of the wood-chips produced from Populus x euroamericana clone MAX 4. Monitoring of dendrometric wood properties was carried out on 1 144 individuals, and to assess the production can be stated as follows: the average taking of the monitored area was 95.9%, the thickness strain in the middle d1,3 is 7.8 mm and an average height is 1.48 m. The relative Poplar wood moisture was wr= 59.19 %, and of bark wr= 52.29 %. The gross calorific value of wood and bark of the clone MAX 4 was assessed through an experimental measurement in a calorimeter for solid fuels, model IKA C 200. Net calorific value of wood and bark were calculated from the gross calorific value qv,gr,d, as well as the hydrogen [w(H)d] and relative moisture [MT] in the wood-chips. The gross calorific value and net calorific value of wood was qv,gr,d = 19 882 kJ.kg−1, qv,net,m = 8 345 kJ.kg−1. The gross calorific value and net calorific value of bark was also assessed qv,gr,d= 20 372 kJ.kg−1, and qv,net,m = 9 607 kJ.kg−1. The share of bark in the wood-chips was assessed 32.7 %. Ash content of wood was assessed Ad = 1.3 % and of bark Ad= 4.0 %. Observed values have been determined for one-year-old poplar cuttings and they are higher than the chips at the end of the production period for about 4 years.
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