Technology and energy balance in stump harvesting with MCR500
2018
Zimelis, A., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Sisenis, L., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Sarmulis, Z., Latvian State Forest Research Inst. Silava, Salaspils (Latvia) | Ariko, S., Belarusian State Technological Univ., Minsk (Belarus)
With the increasing demand for renewable energy in the domestic market, additional attention is paid to the use of stump-wood in energy supply. The stump harvesting technology is not substantiated sufficiently so that the end users can use this unpredictable raw material to generate heat and power. Service providing logging companies need to know the specific requirements to equipment and the characteristics of stump harvesting technologies in order to assess the possibility of acquiring this natural resource. The stump harvesting should be planned along with the regenerative felling, because the layout of the timber forwarding roads and the characteristic of the logging residues layer on the road surface are important. In its turn, when planning the upper timber yard, it is necessary to take into account the meteorological data, the prevailing wind direction and water streams. The aim of the study is to find out the total energy balance during the stump extraction with the MCR500 bucket. Working time, output volumes and productivity indicators are derived from the project “Development and testing of a prototype of multifunctional equipment for stump-wood production and preparation of the soil mounds” (2DP/2.1.1.1.0/10/APIA/VIAA/174) results and from the results of the joint stock company “Latvia state forest” project implemented in 2008. The most energy-consuming process is comminution of biomass, therefore it is common, and for instance, in Finland that electricity-operated equipment located near the customer is used to carry out this work. More efficient use of forest resources by stump extraction and further utilization in heat and power production can increase biomass deliveries for energy applications by 500 thousand tons of dry matter of currently unused coniferous stump biomass annually.
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