Desempenho do harvester na colheita de eucalipto em diferentes espaçamentos e declividades

Leite, Elton da Silva; Minette, Luciano José; Fernándes, Haroldo Carlos; Souza, Amaury Paulo de; Amaral, Edvaldes José do; Lacerda, Elcio das Graça

doi:10.1590/s0100-67622014000100009

Cited by 23 publications

(25 citation statements)

References 6 publications

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“…This occurred by the fact that, in larger slopes; there are points of greater inclination that require the operator to change gears all the time to reduce speed and the risk of the harvester to fall over. Similar results were found by Leite et al (2014) in forestry mechanical harvesting, in which by working in areas of 17% of slope there an increase of 11% of the time is spent to perform the same amount of service to the area with 7% of slope, increasing the cost of harvesting. Höfig and Araujo-Junior (2014) emphasize the importance of considering the slope in the planning of the coffee mechanization, treating each slope level suitability in a unique way.…”

Section: Resultssupporting

confidence: 82%

Operational performance of the mechanized picking of coffee in four soil slope

Tavares¹,

Silva²,

Santinato³

et al. 2016

Afr. J. Agric. Res.

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The coffee mechanized picking is an essential operation in modern coffee crop, however, is still an activity with few studies that emphasize the factors that could interfere in its operational performance. Assuming that the slope of the land can be one of these factors, it aimed to evaluate operational performance of a mechanized set of coffee picking in different terrain slopes. The treatments consisted of coffee mechanized picking in four slope lanes (0.0 to 5.0%, 5.1 to 10.0%, 10.1 to 15.0 and 15.1% to 20.0%) distributed in experimental design in lanes with three replications. The evaluation of the operational performance was materialized by means of timing and movements' analysis, collecting up time in operation, unloading and maneuvering, as well as efficiencies analysis of picking and cleaning. The operation was performed in crop with 1.133 kg of coconut coffee ha -1 to be picked. The slope of the land, from 15.1%, interferes in the performance of the harvester, significantly reducing the effective and operational field capacity. Slopes of up to 20% do not harm the cleaning efficiency; on the other hand, for picking efficiency, slopes higher than 15% significantly reduce the performance of the machines.

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Section: Resultssupporting

confidence: 82%

Operational performance of the mechanized picking of coffee in four soil slope

Tavares¹,

Silva²,

Santinato³

et al. 2016

Afr. J. Agric. Res.

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“…However, 60 measurements for each machine were performed, for analyzed factors, noise and vibration. Each measurement had duration of four minutes, a time interval capable of absorbing the entire operational cycle of the machine for the slaughter and processing of 10 trees [15].…”

Section: Discussionmentioning

confidence: 99%

Occupational Noise and Vibration Assessments in Forest Harvesting Equipment in North-eastern Brazil

Lima

Souza

et al. 2019

JEAI

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Occupational hazards arising from physical agents present in wood harvesting equipment may cause irreversible damage to the health of exposed operators. Thus, the objective of this study was to quantify the noise and vibration levels emitted by three types of wood harvesting equipment (Feller-buncher, Harvester and Forwarder) in a forestry company in north-eastern Brazil during a workday. Noise measurements were performed with an equivalent noise level meter (audiodosimeter) at the workstation and compared with the limits set in NR-15. To evaluate the vibration was used a full cup gauge, which has a sensor called triaxial accelerometer (directions X, Y and Z), installed on the operator's seat. As a result, the average noise dose of all activities in the operation studied did not exceed the maximum allowable limit of 85 dB (A) for 8 hours of continuous Lima et al.; JEAI, 40(5): 1-9, 2019; Article no.JEAI.51345 2 work. The whole body vibration in all equipment was below the exposure level, however, some equipment obtained indexes slightly higher than the alert level, a fact that shows a higher accuracy in the equipment. Original Research Article

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“…When Leite et al (2014), evaluated the harvester performance working in different spacing and declivity, they found different values for this work. The operation cost obtained by those authors was US$ 145.29 h -1 .…”

Section: Operational Costmentioning

confidence: 92%

Evaluation of Costs of Harvester in Cut and Processing of Eucalyptus Wood1

et al. 2017

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-Before performing any financial analysis costs must be calculated. These costs should allow the planning and control over the use of the machines as well as the comparison between different investments alternatives since this is easily calculated. Generally the operating costs of forest harvesting machines are estimated until the maximum of 25,000 hours of work, and it is not possible to know whether the activity remains profitable thereafter or not. For this reason the objective of this study was to evaluate the costs from cutting activities and wood processing carried out by a forestry tractor harvester up to approximately 30,000 hours of work. Ten forest machines composed of two models of harvester (John Deere, model 1270D and 1470D) were used. A spreadsheet provided by a forestry company located in the state of Minas Gerais, containing the necessary data to estimate the operating cost of the machines and subsequent achievement of the sensitivity analysis was used. The operating cost was obtained by the sum of the fixed and variable costs. For sensitivity analysis the variation ± 20% of the most representative elements of the total cost of the machine was performed. The results for the operating cost of the harvester and forwarder was U.S. $ 190.85 h -1 . Costs for repairs and maintenance, labor, fuel, and depreciation represented approximately 90% of the total cost of the machine. Despite the fact that the age of the machine has a direct influence on its operating cost, the costs did not behave in a linear fashion over the years.Keywords: Forest economics; Forest harvesting; Mechanization forest. AVALIAÇÃO DE CUSTOS DO HARVESTER NO ABATE E PROCESSAMENTO DE MADEIRA DE EUCALIPTORESUMO -Antes da realização de qualquer análise financeira é necessário que os custos sejam computados. Os custos devem permitir além do planejamento e controle do uso de máquinas a comparação entre diferentes alternativas de investimento, sendo facilmente calculados. Geralmente os custos operacionais de máquinas de colheita florestal são estimados até no máximo 25.000 horas de trabalho, não sendo possível saber se atividade continua rentável após esse período. Por este motivo objetivou-se com este trabalho, avaliar os custos provenientes da atividade de corte e processamento da madeira realizada pelo trator florestal harvester até aproximadamente 30.000 horas de trabalho. Foram utilizadas 10 máquinas florestais compostas por dois modelos de harvester (John Deere, modelos 1270D e 1470D). Foi utilizada a planilha fornecida por uma empresa florestal situada no estado de Minas Gerais, contendo os dados necessários para a estimativa do custo operacional das máquinas e posterior realização da análise de sensibilidade. O custo operacional foi obtido por meio do somatório dos custos fixos e variáveis. Para a análise de sensibilidade foi realizada uma variação de ± 20% dos elementos mais representativos do custo total da máquina. Os resultados obtidos para o custo operacional médio geral do harvester foi de US$ 190,85 h -1 . Os custos...

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Desempenho do harvester na colheita de eucalipto em diferentes espaçamentos e declividades

Cited by 23 publications

References 6 publications

Operational performance of the mechanized picking of coffee in four soil slope

Operational performance of the mechanized picking of coffee in four soil slope

Occupational Noise and Vibration Assessments in Forest Harvesting Equipment in North-eastern Brazil

Evaluation of Costs of Harvester in Cut and Processing of Eucalyptus Wood1

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