Fuel consumption in the transport of technical broadleaf roundwood in lowland areas (original) (raw)

Transport of Technical Roundwood by Forwarder and Tractor Assembly from Poplar Plantations

This article presents the results of a research dealing with operating efficiency of articulated and tractor assemblies in the plots of poplar plantations in which different means of work were used for felling and cross-cutting. The aim was to study the effects of the arrangement of wood assortments on the driving speed of the vehicle, the time needed to load and manipulate the vehicle and the overall working efficiency of forwarders. The research was carried out in Vojvodina, in the area of PE »Vojvodina šume«. Altogether 170 transport cycles were recorded and 2166.73 m3 transported. The research results show that the forwarder moved faster on the felling site where the felling and cross-cutting operations were carried out by a harvester. The speed was 10% higher and it took 5% less time to load the forwarder. The differences were considerably greater concerning the manipulation time (maneuvering and positioning the vehicle during the loading). The driving speed decreased with an increase in the load volume. Fuel consumption was lower in the felling site where a harvester was used for felling. Under the same working conditions, the tractor assembly achieved better productivity because it drove at considerably higher speeds. The differences in the average load volume were not so great, which significantly affected the productivity of the tractor assembly. The initial hypothesis that a forwarder achieves better working efficiency in the felling site, where a harvester has been used in the operations of felling and cross-cutting, was confirmed.

Analysis of Fuel Consumption Sensitivity in Forestry Road Transport

FLORESTA, 2019

The objective of this work was to analyze how the variation of traveled distance, operational speed, journey time and net cargo transported influence the fuel consumption of vehicles in forest road transport. The data were collected in this operation, covering the area between the regions of Campo do Tenente (forest unit) and Piên (industrial unit), in the state of Paraná. We analyzed the partial elements, loaded trip and empty trip, as well as the total transport cycle (loading, unloading and travel). Using the same mechanical tractor, two vehicular compositions were studied, an articulated vehicle (truck tractor + semitrailer + trailer) and a conjugated vehicle (truck tractor + semitrailer). The vehicle telemetric system was used to perform the data collection of travel time, traveled distance, speed average and fuel consumption of the both vehicles. The results showed that the higher fuel consumption occurred in the loaded trips for longer distances. The sensitivity of fuel consu...

Problems of Sustainable Transport of Large-Sized Roundwood

Sustainability, 2020

When considering the economic and environmental aspects of forestry, especially the issues related to timber harvesting, emphasis should be placed on the importance of the availability of raw material resources for the sustainable flow of goods. It would also be difficult to disregard certain issues related to transport, which play a key role in the efficient flow of wooden raw materials. It has to be noticed that timber transport options are limited by a number of factors, including the considerable fragmentation of wood resources and the lack of adequately developed railway transport facilities. This paper focuses on issues related to the road transport of timber carried out by transport companies. Observations to date of large-sized roundwood (thicker than 14 cm and longer than 3 m) transport in Poland indicate a relatively frequent occurrence of overloaded vehicles, exceeding the permissible total weight limit. Empirical evidence also suggests that in many cases, it is an effect...

Modeling of Fuel Consumption for Forest Transportation

Revista Caatinga, 2016

ABSTRACT: As fuel costs increase, it is essential to take measures involving planning and control on any activities with high consumption. Thus, the main aim of this work was modeling the fuel consumption of forest road transportation by truck. We collected data about time, driving distance, average speed, fuel consumption and the load carried by the vehicle for loaded trips, unloaded trips, and the total cycle of forest transport in regions between the municipality of Campo do Tenente (forest site) and Piên (factory) located in Paraná state, Brazil. The Pearson's correlation was used to determine the relationship between variables, while the Stepwise procedure was used to generate regression equations to estimate fuel consumption. The highest correlations were found between fuel consumption and driving distance, average speed and liquid weight of the load; also, there was a significant correlation between driving distance and average speed. Adjusted equations were statistically...

Truck transportation and chipping productivity of whole trees and delimbed energy wood in Finland

Croatian Journal of Forest Engineering

The present study aims to evaluate the competitiveness of various supply systems of smalldiameter wood harvested from young stands for fuel. Trees were harvested for the cost comparison either as (i) multi-stem delimbed shortwood or (ii) as whole trees or (iii) the harvesting was based on bundle-harvesting using the Fixteri II bundle harvester. The cutting of whole trees and multi-stem delimbed shortwood was carried out using a conventional harvester head equipped with multi-tree-handling accessories. Forwarding was carried out using a standard medium-sized forwarder. The comparison of procurement costs was done at stand level as a function of breast height diameter (5-13 cm) and on-road transportation distance (5-160 km). The harvested wood was chipped either at a roadside landing or at a terminal using a trailermounted drum chipper. The comparison of the supply systems was done using recently published productivity parameters and data obtained from complementary field studies repo...

Parameters of Trucks and Loads in the Transport of Scots Pine Wood Biomass Depending on the Season and Moisture Content of the Load

2021

Transport of wood biomass is one of the key operations in forestry and in the wood industry. An important part is the transport of shredded wood, where the most common forms are chips and sawdust. The aim of the research was to present the variability of the total weight of trucks (gross vehicle weight, GVW), the weight of the empty trucks (tare), and loads of chips and sawdust in different periods of the year. Changes in specific parameters were analyzed: GVW; tare weight; trailer capacity; use of the trailer load capacity; bulk volume and bulk density of wood biomass loads; solid cubic meter (m3) and weight of 1m3 of the load; and load weight depending on the season, with simultaneous measurements of wood chips and sawdust moisture. More than 250 transports from four seasons of the year were analyzed in the research. It was found that the total weight of trucks (GVW) was at a comparable level, on average from 39.42 to 39.64 Mg with slight differences (with SD 0.29 and 0.39). The w...

Operational Analysis of Forestry Transportation Using Self-loading Trucks in a Mountainous Region

Floresta e Ambiente, 2018

This research was conducted in wood harvesting and transportation areas in the mountainous region of Espírito Santo, Brazil, aiming to analyze the road transportation of forestry wood operations with self-loading trucks. The study identified and evaluated the times, average speed, mechanical availability, level of use and operating efficiency of three different designs of self-loading trucks. According to the results, there was no statistical difference between the vehicles regarding average speed. The highest mechanical availability was found in truck A (93.2%), followed by B (84.3%) and C (79.8%). The greater degree of utilization was found in truck B (91.8%), with little variation between vehicles C (90.0%) and A (89.9%). The highest operating efficiency was observed in truck A (83.9%), followed by B (77.4%) and C (71.8%). We concluded that self-loading truck A was the most efficient.

Importance of the Moisture Content of Large-Sized Scots Pine (Pinus sylvestris L.) Roundwood in Its Road Transport

Forests, 2021

Scots pine (Pinus sylvestris L.) is one of the most important forest tree species in Europe, and its wood is a main raw material in the wood industry of many countries of the region. The high variability of pine wood density in connection with its moisture content is a challenge in transport operations. An important part of the roundwood transport of pine wood by trucks is the transport of large-size roundwood (sawlogs). As part of the research, an analysis was carried out of the influence of absolute wood moisture content, determined in various ways, on selected truck transport parameters of large-size pine wood. The analyses of the supply of wood to a large sawmill in northern Poland took into account different seasons. The results indicate that the average moisture content of the transported pine wood is at a level of approximately 95% (determined by dry weight) and the density at 0.878 Mg m−3 (determined using the stereometric method). Quick measurement with the use of a resista...

Time consumption and productivity analysis of timber trucking using two kinds of trucks in northern Iran

Journal of Forest Science, 2013

Increasing productivity and reducing cost in long-distance transportation have become increasingly important in the logistics of forest harvesting operations. This paper presents the research results of the performance of loading with Volvo 4500 BM and timber trucking using two types of common trucks in the Nav watershed in Iran. Both trucks can carry logs shorter than 7.8 m in length. The study used a time study based on empirical data for loads collected from one procurement district in the Nav watershed. The models included the following explanatory factors: driving distance, number of logs, and load volume. The time consumption and productivity of loading and timber trucking depends on several variables such as volume and number of logs per cycle. To evaluate the current transportation system in the Nav watershed, the empirical time study was conducted. Since transportation includes several phases and since many factors affect the work performance, significant variation in the t...

Energy consumption in agriculture transportation operations

Engineering in agriculture, environment and food, 2016

Fuel consumption intensity in agricultural transportation tasks was examined by theoretical assessments as well as practical test runs in laboratory and on road. A theoretical model for the fuel consumption intensity was created on the basis of basic equations and the results were compared to the measured figures. The results indicated that the model was working reasonably well. However, several variables included in the model require assumptions and estimations, and thus a good feel about the related issues is needed to use the model. The overall results from the study indicated that the key factors considering the energy efficiency in transportations are the rolling resistance, engine loading and payload to dead weight-ratio. With appropriate management, the energy efficiency of an agricultural tractor can be close to that of a truck. Additionally, the accuracy of the fuel consumption data captured from the tractor CANbus was examined. It was concluded that it was accurate enough for purposes such as energy analysis, but not for applications that demand high absolute accuracy.