Performance of a small-scale chipper for professional rural contractors

The study determined the productivity, fuel consumption and product quality obtained with a new tractor-powered drum chipper, designed to reduce the gap between industrial chippers and small-scale chippers. The machine was tested with poplar logs and beech slabs, considered as representative of the raw material commonly used for energy wood production. After accounting for accessory work and delays, productivity of green chips ranged between 4 and 6 tons per scheduled machine hour, which was very good for a tractor-powered unit. Specific fuel consumption of oven-dry chips varied between 2.5 and 3.0 L per ton, or 0.6 L per m3. These figures compared favourably with those obtained from previous studies of both smaller and bigger chippers. Chip quality was very good. Samples contained no oversize particles, qualifying for use in small-scale plants. The average size of beech chips was significantly larger than for poplar chips, possibly due to the higher strength of beech wood.

[1]  W. D. Basford,et al.  A comparison of energy use in conventional and integrated arable farming systems in the UK , 2003 .

[2]  Natascia Magagnotti,et al.  Assessing the cost of stump-site debarking in eucalypt plantations , 2011 .

[3]  M. C. Bolding,et al.  Parcelization of South Carolina's private forestland: loggers' reactions to a growing threat. , 2009 .

[4]  G. Pellizzi.  Use of energy and labour in Italian agriculture , 1992 .

[5]  Bruce R. Hartsough,et al.  A survey of Italian chipping operations , 2001 .

[6]  C. Reynolds.  Woodfuel chipping: field trials. , 1998 .

[7]  Natascia Magagnotti,et al.  Performance of a mobile mechanical screen to improve the commercial quality of wood chips for energy. , 2011, Bioresource technology.

[8]  Lauri Sikanen,et al.  The cost effect of forest machine relocations on logging costs in Finland , 2006 .

[9]  Dominik Röser,et al.  Sustainable utilisation of forest biomass for energy - possibilities and problems: policy, legislation, certification, and recommendations and guidelines in the Nordic, Baltic, and other European countries. , 2007 .

[10]  F. C. Williams,et al.  Some Key Issues Concerning Current Poplar Production and Future Marketing in the United Kingdom , 2006, New Forests.

[11]  Jukka Ahokas,et al.  Indirect energy input of agricultural machinery in bioenergy production. , 2010 .

[12]  Rien Visser,et al.  Analyzing and estimating delays in wood chipping operations. , 2009 .

[13]  Natascia Magagnotti,et al.  Physical characterization of commercial woodchips on the Italian energy market , 2011 .

[14]  Eugenio Cavallo,et al.  A new comminution device for high-quality chip production , 2012 .

[15]  N. Magagnotti,et al.  Determining the impact of some wood characteristics on the performance of a mobile chipper , 2011 .

[16]  Dominik Röser,et al.  Chipping operations and efficiency in different operational environments. , 2012 .

[17]  R. Spinelli,et al.  Wood chips size distribution in relation to blade wear and screen use , 2010 .

[18]  A. Strehler,et al.  Technologies of wood combustion , 2000 .

[19]  Leif Gustavsson,et al.  Heating Detached Houses in Urban Areas , 2003 .

[20]  Natascia Magagnotti,et al.  A tool for productivity and cost forecasting of decentralised wood chipping , 2010 .

[21]  R. Björheden,et al.  Integrating production of timber and energy - a comprehensive view. , 2000 .