Content related to WP3

T4E Bucking App ready for download

Two years of development and a lot of testing by Latschbacher and the Institute of Forest Engineering of BOKU led to this mobile device based application for value-optimized motor-manual bucking. Get our T4E Bucking App now for free from GooglePlay Store!

More information in our Results section!
http://www.tech4effect.eu/results/bucking-app/

Field test: Controlling of cable yarding operations

BOKU and Konrad are working on enabling advanced operation progress monitoring and performance evaluation through pooling sensor information on cable yarders.
The first field test has taken place during a downhill yarding operation with a Konrad Mounty 4000 yarder to test the system under real-life conditions, contributing to work package 3 – harvesting.

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Publication: Decreasing Fuel Consumption of Excavator-Based Harvesters with Machine Control System

Compared with purpose-built units, excavator-based harvesters offer many advantages, but they consume more fuel. Fuel efficiency can be increased by a better interface between the excavator and the harvester head.

Spinelli et al from CNR just published testing results of a new adaptation kit in Forests 2019 (10(1), 43; https://doi.org/10.3390/f10010043). The kit is specifically designed to improve the communication between these two components. After installing the adaptation kit, productivity increased 6%, while fuel consumption per hour decreased 3.5%. Fuel consumption and CO2 emissions per product unit decreased 10%, as an average.

Read the abstract or download the full pdf!

 

Figure 1: One of the excavator-based harvesters at work (left); the adaptation kit (right).

Field tests: forest road bearing capacity

What´s going on under your truck wheel? BOKU is preparing for field tests in the North of Austria. Special soil sensors have been burried to investigate the impact of harsh weather conditions on forest road bearing capacity. High resolution soil parameters and weather data are captured and transmitted to BOKU for analysis, contributing to work package 3 – harvesting.

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Publication: Modifying the settings of CTL timber harvesting machines to reduce fuel consumption and CO2 emissions

Following extensive field trials, LUKE just published results on experiments with Ponsse harvesters:

  • Adjustment of machine settings had an effect on fuel consumption and CO2 emissions.
  • Large energy saving potential in the Nordic and Baltic regions alone:
  • Potential savings may amount to almost 50 million litres of diesel per year.
  • Stem size also had a strong effect on fuel consumption and productivity.

Read the abstract or download the full pdf!

Whatch the video produced during the field trials: http://www.tech4effect.eu/fuel-economy-tests-harvesters/

 

Figure 1: The machines studied in the experiment, upper-left the Ponsse Beaver, upper-right the Ponsse ScorpionKing, below the Ponsse Ergo.

Field trials: Cable-assisted timber harvesting on steep terrain

In cable-assisted timber harvesting forces on the cable are enormous. But how strong exactly are they?

As part of TECH4EFFECT WP3 , Markus Engel and Andreas Mayerhofer (ÖBf – Austrian Federal Forests ) and Thomas Holzfeind from BOKU carried out investigations on winch assisted harvesting machines in the ÖBf forest district Flachau (Austria). They recorded the inclination of the machine during operation on steep terrain using a tilt sensor installed on the winch assisted Valmet 840TX forwarder. At the same time, the tensile forces in the cable were measured with a load shackle. In addition, all activities of the machine were recorded by an action camera, which will be analysed later together with inclination data and the tensile forces. The results are intended to shed light on the tensile forces that occur in the cable of the machine as a function of the work processes and the machine inclination.

 

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Cable assisted forwarder operating on steep terrain; pictures: Holzfeind Thomas

First field trials with bucking app

The Bucking App is a software for mobile devices to calculate into which length and parts to cut a tree in terms of revenue during motor-manual harvesting operations. Jointly developed by BOKU, Latschbacher and the Austrian Federal Forests (ÖBf), first field tests were conducted recently in Austria.

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Successful TECH4EFFECT field trials with cut-to-length machines to reduce fuel consumption

Project partners LUKE, CNR-IVALSA and PONSSE successfully conducted field trials near Jyväskylä, Finland, on the efficiency of cut-to-length harvesting machines in cooperation with a contractor and their operators. The aim was to reduce the fuel consumption of harvesters during cut-to-length operations by applying various technical settings to the machines, like idle times, engine settings and fine-tuning of hydraulic power supply components.

A team of three to seven researchers, three operators and representatives of the manufacturer was working on site, collecting lots of measurements, study data and video material. Three different PONSSE harvesters were studied but similar measures can then also be applied for other machine types, such as forwarders used in timber extraction.