Pure Energy Ratio of logging residua processing

This paper aims to determine the energy balance and efficiency of energy forest biomass production for different variations of technological chains. The assessment of logging technologies and wood raw material processing impact to environment comes from Energy Audit. The energy balance and efficiency assessment determination result from different technological procedures in energy biomass acquisition. Pure Energy Ratio (PER) of forest logging residues production and transfer is about 8 to 12 according to the specific technological chain. In combination with the final efficiency of the energy source combustion the PER value is significantly reduced. The lowest PER is achieved in large scale condensation power stations with the low co-firing (wood and coal) efficiency.