Naslov
The development of electric hybrid drive of forest tractor - skidder

Autori
Šusnjar, Marijan ; Lepoglavec, Kruno ; Nevečerel, Hrvoje ; Pandur, Zdravko ; Karlušić, Juraj ; Kopseak, Hrvoje

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 17th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES 2022) / - , 2022 / - , 2022, 1-11

Skup
17th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES 2022)

Mjesto i datum
Paphos, Cipar, 06.11.2022. - 10.11.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
hybrid drive, skidder, energy consumption, measuring data

Sažetak
Growing demand for forest machines that cost less to operate, along with regulatory pressures for lower emissions, increase manufacturers' interest in developing electric and hybrid drives compared to traditional hydraulic and mechanical ones. While pure electric drives of forest machines meet a lot of bottlenecks (costs of the electric components, battery durability, duration of charging, size of batteries which could ensure enough energy for 8 h working time), electric hybrid drives offer a favorable solution for the propulsion of forestry machinery in terms of lower fuel consumption and improved efficiency. Among all forest vehicles, specialized forest tractors (skidders), so far, has not been considered a forest vehicle with hybrid drive capabilities. A skidder is a forest articulated self-propelled vehicle for pulling trees or parts of trees. In most countries of southern Europe, the use of skidders equipped with forest winches are the most common technique for timber extraction. The first goal of the research is to develop methods for measuring the energy consumption of skidders at different operating tasks and under different field conditions. Research was performed on skidder Ecotrac 140V (from Croatian producer Hittner Ltd.) during timber extraction in mountainous terrains in Lika County. Skidder was equipped with measuring device WIGO-E (Telematic Data collector) gateway with integrated GPS system which ensured collecting and storing data from sensors and motor computer via CANBUS and data transfer with GSM to Web platforms. Also, a fuel flow meter was installed on the skidder. Data on fuel consumption (mL), position (travelling route), detection of winch work, engine rpm (min-1), engine torque (% of max), throttle position (%), engine temperature were measured with sampling frequency of 5 s. Besides, skidder load volumes per cycles and slopes of tractor paths were constantly measured. The paper shows the skidder's energy consumption per day, work cycle and individual work procedure with regard to the size of the load, the slope of the tractor path and the direction of movement based on overlapping and merging all measuring data. Using mathematical and simulation models of the drive with defined operating cycles obtained by measurement, the structure of the hybrid drive and the dimensions of the elements of the hybrid drive (internal combustion engine, electric motor, batteries, control unit) are determined and presented in the paper.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Šumarstvo

POVEZANOST RADA