Fuel and lubricants consumption during timber felling and processing in the area of p.j. Forest office „Zavidovići“

Abstract

Chainsaw is the main tool for work in a phase of wood felling and processing of forest harvesting in BiH. The aim of the research was to determine fuel and lubricant consumption of the chainsaws Husqvarna 365 and Dolmar PS – 7310 in the phase of felling and processing of wood assortments at the area of P.J. Forest Office „Zavidovići“, forest compartment 203. The volumetric method was applied for the measurement of fuel and lubricants consumption, with precise determination of fuel and lubricant quantity in chainsaw tanks. In total 140 trees of the sessile oak were felled (70 trees with chainsaw Husqvarna 365 and 70 trees with chainsaw Dolmar PS – 7310) during the research. The diameter at the breast height of felled trees ranged from 15 to 84 cm, while tree height ranged from 10,3 to 37,2 m. The total volume of processed assortments was 180,11 m<sup>3</sup>. The average fuel consumption per m<sup>3</sup> processed assortments was 0,306 L/m<sup>3</sup> for trees felled by chainsaw Husqvarna 365 which is for 0,042 L/m<sup>3 </sup>larger in comparison to chainsaw Dolmar PS – 7310 with average fuel consumption of 0,264 L/m<sup>3</sup>. The average lubricant consumption per m<sup>3</sup> processed assortments was 0,102 L/m<sup>3 </sup>for trees felled by chainsaw Husqvarna 365 which is for 0,012 L/m<sup>3</sup> larger in comparison to chainsaw Dolmar PS – 7310 with average lubricant consumption of 0,09 L/m<sup>3</sup>. Considering conducted research it can be assumed that there are differences in fuel and lubricant consumption between this two type of chainsaws for considered working conditions, but differences are not statistically significant.

Skidders Fuel Consumption in Two Different Working Regions and Types of Forest Management

“…Fuel consumption rates for a single forest machine in a timber harvesting system are affected by the engine size, load factor, condition of the equipment, operator's driving skill, and environmental conditions, as well as the design of the machine [11]. According to Halilović et al [12], the following factors affect fuel consumption: external factors (climatic, field, and stand), machine factors (engine, working, and transmission part factors), technological factors (working method and work operations), and organizational factors (machine maintenance and operator education).…”

“…Comparison of fuel consumption rates among studies is sometimes difficult because data is often published in different units: liters per unit of extracted timber (L/m 3 ), liters Forests 2021, 12, 547 2 of 10 per productive machine hours (L/PMH) or scheduled machine hours (L/SMH), liters per unit of power (L/kWh), liters per unit weight of the machine (L/ton).…”