Efficiency of a Woody 60 processor attached to a Mounty 4100 tower yarder when processing coniferous timber from thinning operations
Keywords:efficiency, time expenditure, productivity, processor tower yarder, landing operations, traditional harvesting equipment
AbstractProcessor tower yarders (PTY) represent the current state of yarding technology being extensively used in mountainous conditions such as those from Central Europe where they were also developed and used for the first time. In proper technical conditions which are mostly related to forest road infrastructure such equipment may be introduced by technology transfer in other countries such as Romania where they could replace actual less-efficient forest equipment used in steep terrains. The aim of this study was to evaluate the efficiency of such equipment in conditions of thinning operations by adapting a time study to the general concepts and by using data collection techniques to suit the operational conditions imposed by such equipment. In conditions of a mean tree volume of 0.21 m3 × tree-1, the results of our study indicate net production rates as high as 12.72 m3 × h-1 when processing trees on landing, which could be also improved up to 17.52 m3 × h-1 if the PTY have been be adequately installed on the forest road. Another key aspect which could improve the efficiency of such equipment performing landing operations is the number of planned and realized wood assortments since the time expenditure was affected by their number. Given the reduced impact on forest soils as well as the increased efficiency of tower yarders, our study concludes that there would be a lot of potential in actually using them in the Romanian forests located in steep terrain, if proper transportation infrastructure would exist.
Björheden R., Apel K., Shiba M., Thompson M., 1995. IUFRO forest work study nomenclature. Grapenberg, Sweden: Swedish University of Agricultural Science, Department of Operational Efficiency, 16 p. BorzS.A., Ciobanu V.D., 2013. Efficiency of motor-manual felling and horse logging in small-scale fi rewood production. African Journal of Agricultural Research 8(24): 3126-3135. Borz S.A., Bîrda M., Ignea G.,Oprea I., 2011. Technological aspects regarding timber exploitation using Mounty 4100 cable yarder. Bulletin of Transilvania University of Braşov 4(53): 1-6. Cavalli R., 2012. Prospects of research on cable logging in forest engineering community. Croatian Journal of Forest Engineering 33(2): 339-356. Ciubotaru A., 1998. Exploatarea Pădurilor [Forest Harvesting]. Lux Libris Publishing House, Braşov, 351 p. Danilović M.,TomaševićI., Gačić D., 2011. Efficiency of a John Deere 1470D ECOIII harvester in poplar plantations. Croatian Journal of Forest Engineering 32(2): 533-548. Dvořák J., 2010. Operation time consumption of highpowered harvester in salvage felling. EJPAU 13(4): #12. GiurgiuV., DeceiI., Drăghiciu D., 2004. Metode şi tabele dendrometrice [Auxological Methods and Tables]. Ceres Publishing House, Bucharest, 575 p. Ghaffariyan M.R., Stampfer K., Sessions J., 2010. Optimal road spacing of cable yarding using a tower yarder in Southern Austria. European Journal of Forest Research 129: 409-416. DOI: 10.1007/s10342-009-0346-7 Ghaffariyan M.R., Stampfer K., Sessions J., 2009. Production equations for tower yarders in Austria. International Journal of Forest Engineering 20(1): 17-21. Heinimann H.R., Stampfer K., Loschek J., Caminada L., 2001. Perspectives on Central European Cable Yarding Systems. In: Schiess P., Krogstadt F. (eds.), International Mountain Logging and 11th Pacific Northwest Skyline Symposium, December 10-12 2001, Seattle,WA, USA. College of Forest Resources, University of Washingtonand International Union of Forestry Research Organizations, pp. 268-279. Magagnotti N., Spinelli, R. (Eds.), 2012. COST Action FP0902 – Good Practice Guideline for Biomass Production Studies. CNR IVALSA, Florence, Italy, ISBN 978-88-901660-4-4, 41 p., available at: www.forestenergy.org Matsuno A., Koike K., 2012. Tower yarders, not suitable in Japan? Technology transfer is still going on. In: Pentek T., Poršinsky T., Špročić M. (eds.), Proceedings of the 45th International Symposium on Forestry Mechanization "Forest Engineering: Concern, Knowledge and Accountability in Today's Environment", October 8-12, Dubrovnik(Cavtat), Croatia. Foresty Faculty of Zagreb University, pp. 1-9 (available on CD support). Ministerul Industrializării Lemnului şi a Materialelor de Construcţii, 1989. Norme şi normative de muncă unificate în exploatările forestiere, [Ministry of Wood Industrialization and Construction Materials, 1989. Unified Norms and Normative in Timber Harvesting Operations,Bucharest], Bucureşti, 493 p. Messingerová V., Stanovský M., Ferenčik M., Kováčik P., 2009. Technological Planning in Cableway Terrains in Slovakia. In: Proceedings of 42nd International Symposium on Forestry Mechanization - FORMEC 2009, 21- 24 June 2009, Prague, Czech Republic, CULS, Prague, pp. 307-315. Nicolescu V.N., 2014. Silvicultură. Volumul II: Silvotehnică [Silviculture. Volume II: Silvotechnics]. Aldus Publishing House,Braşov, 289 p. Nurminen T., Korpunene H., Uusitalo J., 2006. Time consumption analysis of the mechanized cut-to-length harvesting system. Silva Fennica 40(2): 335-363. DOI: 10.14214/sf.346 OpreaI., 2008. Tehnologia exploatării lemnului [Timber Harvesting Technology]. TransilvaniaUniversityPress,Braşov, 273 p. Oprea I., BorzS.A., 2007. Organizarea şantierelor de exploatare a lemnului [Harvesting Site Organization].Transilvania University Press, Braşov, 133 p. SberaI., 2007. Resursele de lemn şi potenţialul pieţei din România [Wood Resources and the Market Potential in Romania]. Meridiane Forestiere 2: 3-7. Spinelli R, Laina-Rela-o R, Magagnotti N, Tolosana E, 2013. Determining observer and method effects on the accuracy of elemental time studies in forest operations. Baltic Forestry 19(2): 301-306. Stampfer K., Steinmüller T.,2001. Anew approach to derive a productivity model for the harvester Valmet 911 Snake. In: Schiess P., Krogstadt F. (eds.), International Mountain Logging and 11th Pacific Northwest Skyline Symposium, December 10-12 2001, Seattle,WA,USA. College of Forest Resources,University of Washingtonand International Unionof Forestry Research Organizations, pp. 254-262. Şofletea N., Curtu L., 2008. Dendrologie [Dendrology]. "Pentru Viaţă" Publishing House, Braşov, 418 p. Visser R., Spinelli R., 2012. Determining the shape of the productivity function for mechanized felling and felling-processing. Journal of ForestResearch 17: 397-402. DOI: 10.1007/s10310-011-0313-2 Vusić D., Susjnar M., Marchi E., Spina R., Zecic Z., Picchio R., 2013. Skidding operations in thinning and shelterwood cut of mixed stands – Work productivity, energy inputs and emissions. Ecological Engineering DOI: 10.1016/j.ecoleng. 2013.09.052 Zar J.H., 1974. Biostatistical analysis.EnglewoodCliffs,USA: Prentice Hall Inc, 620 p.
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