Productivity assessment of alternative timber debarking methods

Gülci, Neşe; Akay, Abdullah E.; Erdaş, Orhan

doi:10.31298/sl.141.9-10.3

Cited by 8 publications

(8 citation statements)

References 5 publications

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“…The volume of skidded products was estimated by measuring tree length and diameter at mid-length over bark. Huber's formula was commonly preferred formula in the technical application (Eker et al, 2011;Gülci et al, 2017) to calculated the volume in cubic meters (m 3 ):…”

Section: Methodsmentioning

confidence: 99%

Productivity Analysis of Tree-Length Harvesting using Farm Tractor in a Nordmann Fir Stand in Turkey

Çağlar

2020

European Journal of Forest Engineering

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Because of the low investment costs, the winch equipped farm tractors usage is the most common logging technique for the primer transportation of wood-based forest products in Turkey. During the logging operations, farm tractors are commonly used for cable winching at a steep terrain while they are used for skidding operation on relatively flat terrain conditions in forest stands. The aim of this study was to evaluate the working conditions and determine the productivity of uphill winching using a farm tractor during tree length harvesting operation in a Nordmann fir stand (Abies nordmanniana). The study was conducted in Western Black Sea Region of Turkey. The average diameter and length of the forest products which were hauled from stump-site to landing areas were 17 cm and 28 m, respectively. The winching distances were ranged from 10 m to 70 m. Time analysis and field measurements related to independent variables (including winching distance, tree diameter, length and volume) were conducted while the farm tractor was winching the harvested forest products. For the farm tractor, the productivity was estimated and the cycle time prediction model was developed using the multiple regression method. It was found that the average hourly and daily productivity were 5.80 m 3 /hour and 46.42 m 3 /day for 8 hours, respectively. The most time consuming work element was winching (49.2%), followed with delay time (20.1%).

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Section: Methodsmentioning

confidence: 99%

Productivity Analysis of Tree-Length Harvesting using Farm Tractor in a Nordmann Fir Stand in Turkey

Çağlar

2020

European Journal of Forest Engineering

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“…Beberapa hasil penelitian terkait pengupasan kulit kayu yaitu : 1) Gulci et al (2017) menunjukkan bahwa rata-rata produktivitas debarking menggunakan gergaji mesin alat debarking terpasang dan kapak masing-masing adalah 3,36 m 3 /jam dan 0,64 m 3 /jam. Menggunakan gergaji mesin menunjukkan ratarata produktivitas debarking lebih tinggi daripada menggunakan kapak; 2) Sitohang et al (2016) menunjukkan bahwa untuk mengupas satu batang pohon membutuhkan waktu 39,6 detik sehingga mengupas kayu sebanyak 91 batang membutuhkan waktu satu jam.…”

Section: Pendahuluanunclassified

“…Perbedaan ratarata produktivitas debarking tersebut dapat disebabkan oleh rata-rata volume kayu di TPn 1 lebih tinggi yaitu 9,16 m 3 . Hasil uji t yang membandingkan rata-rata produktivitas pengupasan kulit kayu di TPn 1 dengan TPn 2 yaitu t hitung = 2,859 > t tabel (99%) 2,692, hal ini menunjukkan bahwa rata-rata produktivitas pengupasan kulit di TPn 1 lebih baik daripada di TPn 2 Menurut Gulci et al (2017); Budiaman (2002) efisiensi dan produktivitas kegiatan pengupasan kulit dipengaruhi oleh banyak faktor seperti jenis peralatan, struktur fisik pekerja, jenis dan diameter pohon, ketebalan kulit kayu, masa panen, waktu antara penebangan dan pengupasan kulit, kemiringan tanah dan kondisi cuaca. Hasil analisis pengaruh waktu kupas dan volume kayu terhadap produktivitas pengupasan kulit kayu disajikan pada Tabel 3,4 dan 5.…”

Section: Produktivitas Pengupasan Kulitunclassified

Pengaruh Waktu Kupas dan Volume Kayu Terhadap Produktivitas dan Biaya Pengupasan Kulit Kayu Hutan Alam

Suhartana¹,

Yuniawati²

2021

ulin. j. hut. trop.

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Debarking is the activities in the loading point after bucking. The purpose of debarking is to clean wood from bark and reduce the wood moisture content to be easier for further handling. The research method was carried out by selecting the location of 2 loading points where debarking was done, measuring the debarking time and the log volume, and then analyzing the effect of debarking time and log volume on the productivity of debarking with multiple regression analysis. The results showed that: 1) The average debarking produkctivity in loading point 1 was 21.12 m3/hr an average debarking time of 25.49 minutes and log volume of 9.16 m3; 2) The average productivity of debarking in the second loading point was 20.77 m3/hr with an average debarking time of 19.45 minutes and a log volume of 6.81 m3; 3)The average of debarking cost at loading point #1 is lower than at loading point#2; 4) The resulting regression equation model is Y = 20,931.001 – 49,516.314 X1 + 2.324 X2; and 5)The log volume is significant to debarking productivity, while the debarking time is negative

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“…Thousands of products can be obtained from wood, most of which are made with the help of chemical or mechanochemical treatment methods [4]. Since most wood is converted into a cheap product (wood chips) for furniture production or direct sales, its processing is regulated by strict quality requirements like the absence of rot or bark residues [5,6].…”

Section: Introductionmentioning

confidence: 99%

The Mathematical Modeling of Mechanical Group Debarking in a Barking Drum

Kunickaya¹,

Shvetsova²,

Tikhonov³

et al. 2022

MMEP

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The process of wood debarking plays a crucial role in determining the price and quality of the final product. Hence, this work aims to elaborate on a theoretical basis for upgrading wood chips production technology. Consideration should be given to the influence of various debarking parameters when processing wood in barking drums. Such parameters as the number of wood collisions with each other and against a drum body, shear pressure, and others were chosen as equation coefficients to model the wood debarking time and knife sharpening angle. The treatment time is shown to depend on the number of collisions, the diameter of the log and indices that consider filling, the proportion of bark and the thickness, and wood hardness. It was established that the time required to debark the tree using knives is 1.5-3 times lower depending on the temperature of raw materials. Moreover, the process tends to be intensified with increasing knife sharpness.

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Productivity assessment of alternative timber debarking methods

Cited by 8 publications

References 5 publications

Productivity Analysis of Tree-Length Harvesting using Farm Tractor in a Nordmann Fir Stand in Turkey

Productivity Analysis of Tree-Length Harvesting using Farm Tractor in a Nordmann Fir Stand in Turkey

Pengaruh Waktu Kupas dan Volume Kayu Terhadap Produktivitas dan Biaya Pengupasan Kulit Kayu Hutan Alam

The Mathematical Modeling of Mechanical Group Debarking in a Barking Drum

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