Fuel consumption of timber harvesting systems in New Zealand

Yıl 2016, Cilt: 2 Sayı: 2, 67 - 73, 22.11.2016

Paul Oyier Rien Visser

Öz

Fuel is a major cost in timber harvesting operations.
Changes in fuel cost are also typically used by forestry companies in New
Zealand to adjust unit harvesting rates. There is however no benchmark on fuel
consumption rates for the different harvesting systems to assist optimizing the
design of operations. Seventeen ground-based and 28 cable logging crews in New
Zealand were surveyed on annual fuel consumption, production, stand and terrain
attributes, type and number of machines used and their kW rating. The average
rate of fuel consumption was 3.04 lt/m3 and 0.15 lt/kWh for ground-based
systems, and 3.18 lt/m3 and 0.09 lt/kWh for cable yarder systems. There was no
significant difference between the two groups for the average rates of fuel
consumption in lt/m3, but ground-based system were significantly less energy efficient
(more lt/kWh) than cable yarder systems. The average rate of fuel used per unit
volume harvested decreased with total annual system production. Rates of fuel
consumption in lt/kWh are influenced by the type of harvesting system used,
total production, number of machines used, average machine power, slope,
directions of pulling during extraction and surface moisture conditions during
harvesting. Using standard published machine costing spreadsheets, fuel costs
per unit volume of wood harvested was approximately 15% of the total harvest
system cost.

Anahtar Kelimeler

Fuel consumption rates, Ground-based, Cable yarding, Harvesting machines, fuel cost

Kaynakça

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