Abstract
Technical development and system optimization during the last decades have targeted more efficient, socially acceptable and ecologically sustainable ways to use forestry machines and tools. This is supported by the development of electronics and electrical components, as well as battery technology, without which it is impossible to imagine doing some forestry work in forest areas with no permanent source of electricity. Today, we cannot imagine life without e.g. a cell phone, and also doing business in the forestry sector without a field computer. There are numerous examples in everyday life, but also in industry, where portable devices make life and business much easier, and the basis for the operation of these devices is battery technology. The importance of the development of battery technology is proven by the fact that in 2019 the Nobel Prize in Chemistry went into the hands of scientists who developed a lithium-ion battery - a lightweight, rechargeable and powerful battery that is used today in numerous products from mobile phones to laptops and electric vehicles. This paper will outline the historical development of battery technology and the use of battery powered devices, tools and machines with their advantages and disadvantages in forestry sector.
Highlights
1.1 Comminuting machineryComminuting is an important element of forest fuel supply procurement, because the size reduction of wood biomass from its initial form into finer particles improves transport economy and is essential when feeding modern biomass boilers
The advantage of chipping is the homogeneous dimensions of the particles and low fuel consumption of the operation per produced cubic metre of chips
The quality of ground fuel chips is lower, which limits the applicability for the smaller power plants (Strelher 2000, Aman et al 2011, Spinelli et al 2012)
Summary
Comminuting is an important element of forest fuel supply procurement, because the size reduction of wood biomass from its initial form into finer particles improves transport economy and is essential when feeding modern biomass boilers. Dull blades lower the productivity and the quality of the chips (Stampfer and Kanzian 2006, Rinne 2010, Spinelli et al 2011, Spinelli et al 2012, Spinelli et al 2013, Nati et al 2014,). The quality of ground fuel chips (particle size distribution and particle shape) is lower, which limits the applicability for the smaller power plants (Strelher 2000, Aman et al 2011, Spinelli et al 2012). In some roadside chipping systems, chips are blown directly into a chip truck load space, a process that makes the system vulnerable for delays due to interactions between the chipper and the chip trucks Chippers or chip trucks may waste a significant part of the time by waiting and other stoppages reducing their operational efficiency
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