Table 14. Basic data on the forestry machines.1 Reprinted with kind permission from Springer Science + Business Media: Journal of Forest Research, Energy and carbon dioxide (CO2) balance of logging residues as alternative energy resources: System analysis based on the method of a life cycle inventory (LCI) analysis. 10(2), 2005, 125–134. Yoshioka, T, Aruga, K, Nitami, T, Kobayashi, H, Sakai, H, Table 2. © 2005, Springer Japan. 1Hours of operation per year of each machine is supposed to be 1,200 h/y (6 h/d and 200 d/y) here.
2On the basis of the analysis by Hondo et al. (2000), all the parts of each forestry machine are assumed to be made of steel in Chapter 6.
3From Forestry Mechanization Society (ed.) (1999).
4From National Forestry Extension Association in Japan (ed.) (2001).
5The productivity and fuel consumption of each machine are based on field experiments on comminuting, hauling, and transporting logging residues (see Chapters 3, 4, and 5). The kind of fuel in the experimental sites was light oil. 191.4 m of hauling distance is reflected in the productivity and fuel consumption of the forwarder, and 27.8 km of transporting distance is reflected in the productivity and fuel consumption of the truck.
6The number of required machines is calculated from the hours of operation per year, 1,200 h/y, the productivity of each machine, and 30,106 MgDM/y of the annual required amount of logging residues for the plant. For example, the number of required trucks is calculated as: 30106 [MgDM/y]/1200 [h/y]/0.679 [MgDM/h] = 36.95.
7The weight of the required material is calculated from the hours of operation per year, 1,200 h/y, the weight and the durable hours of each machine, and the number of required machines. For example, the weight of the required material for the forwarders is calculated as: 5.60 [Mg] × 1200 [h/y]/5400 [h] × 14.86 = 18.5 [Mg/y].
8The quantity of required fuel is calculated from the hours of operation per year, 1,200 h/y, the fuel consumption of each machine, and the number of required machines. For example, the quantity of required fuel for the mobile chippers is calculated as: 4.53 [dm3/h] × 1200 [h/y] × 55.75 = 303057 [dm3/y].

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