20.500.12556/RUL-158983 Time composition, efficiency, workload, and noise exposure during tree felling and processing with petrol and battery-powered chainsaws in mixed high forest stands This study presents the effects of using a battery-powered chainsaw on work efficiency and ergonomics under real conditions during timber harvesting. The study was conducted during the felling and processing of coniferous and deciduous trees with a diameter at breast height (DBH) of 13 cm to 78 cm using both a petrol-powered and battery-powered chainsaw. The results include comparisons of time composition, work efficiency, psychophysical workload, and noise exposure. Heart rate and noise exposure were measured over ten days as part of a time study using the Husqvarna 543 XP petrol-powered chainsaw and the Husqvarna 540i HP battery-powered chainsaw. The comparison of the time composition between the chainsaws used showed 3%–4% differences in the duration of productive time operations and 16% in service time. The difference in work efficiency during the productive time between the two chainsaws was statistically insignificant, but generally higher when working with the battery-powered chainsaw than with the petrol-powered chainsaw. During the main productive time, the work efficiency was 9.89 min/t for the petrol-powered chainsaw and 9.44 min/t for the battery-powered chainsaw. The psychophysical workload of the feller was lower when using the battery-powered chainsaw than when using the petrol-powered chainsaw as the relative working heart rates during the entire productive time was 32.5% for the battery-powered chainsaw and 35.0% for the petrol-powered chainsaw. The noise exposure of the workers was lower when using a battery-powered chainsaw, namely 6.0 dB(A) and 0.4 dB(C) compared to the use of a petrol-powered chainsaw. The results of this paper indicate that battery-powered chainsaws can compete with petrol chainsaws in harvesting conditions that are currently considered unsuitable due to the large volume of trees. motor-manual work battery-powered chainsaws petrol-powered chainsaws feller deciduous trees coniferous trees time study heart rate exposure to noise baterijske motorne žage bencinska motorne žage sekači listavci iglavci časovne študije srčni utrip izpostavljenost hrupu true false true Angleški jezik Slovenski jezik Članek v reviji 2024-06-26 10:28:54 2024-06-26 10:28:58 2024-12-11 09:38:08 0000-00-00 00:00:00 2024 0 0 15 str, issue 5, article no. 798 Vol. 15 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*3 1999-4907 doi.org/10.3390/f15050798 199785987 forests-15-00798-v2_(2).pdf forests-15-00798-v2_(2).pdf 1 74CCFB3F651750964658518ADBF07BB9 b038bd4d74c2a53c8ac392029ba6a406f62699000071d9e06ec8b88d9a500933 e34b1e9c-3396-11ef-8fa5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186727 https://www.mdpi.com/1999-4907/15/5/798 1 23e09bc0-3396-11ef-8fa5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186726 Biotehniška fakulteta 0 0 0