|
|
|
| Registros recuperados: 21 | |
|
|
| DIXIT, JAGVIR. |
| An existing 1.5kW brush cutter was modified and evaluated with the view to adapt a low-cost rice harvesting machine. The modifications included replacing existing blade with circular saw blade, incorporating a guider and a driver to lay down the harvested crop in swath and attachment of a harness belt for easy and comfortable operation. The machine was evaluated keeping in view major influencing factors i.e., crop establishment (conventional transplanting, system of rice intensification (SRI), and mechanical transplanting), blade type (B1: 40 teeth, pitch 1.92 and B2: 80 teeth, pitch 0.96) and straw moisture content (38-42, 33-37 and 28-32%, w.b). The results showed that the height of cut was significantly affected (p<0.05) by the crop... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brush cutter; Rice harvesting; Crop establishment; Straw moisture content; Blade type; Height of cut; Fuel consumption; Grain loss; Cutting efficiency. |
| Ano: 2022 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7103 |
| |
|
|
| Farias,Marcelo Silveira de; Schlosser,José Fernando; Martini,Alfran Tellechea; Santos,Gustavo Oliveira dos; Estrada,Javier Solis. |
| ABSTRACT: This paper aimed to evaluate the performance of a Diesel cycle engine, changing the configurations for the air and fuel supply system. Variables analyzed were torque, power, specific fuel consumption and thermal efficiency in four different engine configurations (aspirated, aspirated + service, turbocharged + service and turbocharged). For that, there were dynamometer experiments by power take-off of an agricultural tractor. The experimental outline used was entirely randomized, in a bifatorial design with three repetitions. Results indicated that the engine supercharge, compared to its original configuration, provided a significant increase of torque and power. Only the addition of turbo does not caused a significant effect in the engine... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural tractor; Turbocharger; Injection pump; Fuel consumption. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000600352 |
| |
|
|
| Khaled, Ramez; Priour, Daniel; Billard, Jean-yves. |
| A numerical method for optimization of the cable lengths in trawls with respect to the ratio between the estimated trawl drag and the predicted catch efficiency is developed and applied. The trawl cables of interest are warps, bridles, headline and footrope. The optimization algorithm applies an ordered sequential process changing one cable length at the time. It is assumed in the predictions that the catch efficiency of the trawl is proportional with the trawl mouth area. In a case study optimizing a bottom trawl used on a research vessel by applying the new method it is predicted that it would be possible to reduce the ratio between trawl drag and catch efficiency by up to 46% by optimizing the cable lengths. Thus this would enable a considerable... |
| Tipo: Text |
Palavras-chave: Bottom trawl; Modeling; Optimization; Fuel consumption; Drag; Swept area; Mouth surface; Fish distribution. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00130/24106/22857.pdf |
| |
|
|
| Godeša,Tone; Jejčič,Viktor; Poje,Tomaž. |
| One of the most unfavourable characteristics of crude vegetable oil when used as the fuel is the high viscosity. To improve this weakness, oil can be blended with mineral diesel or biodiesel fuels. This study was designed to evaluate how the use of mineral diesel or biodiesel blend with cold pressed rapeseed (Brassica napus) oil affects the engine power, torque and fuel consumption. A tractor equipped with direct injection, water cooling system and three-cylinder diesel engine was used for the experiment. Fuels used were standard diesel fuel (diesel), rapeseed oil methyl ester - biodiesel (B100) and their mixtures with 10, 30 and 50 vol. % of cold pressed rapeseed oil (RO). Increased portion of RO in diesel fuel blends had almost no effect on the torque... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diesel engine power; Torque; Fuel consumption. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000500003 |
| |
|
|
| Segun, Bello Raphael. |
| Abstract Performance characterization of some selected conventional cook stoves in South Eastern Nigeria had been carried out. Three conventional cook stoves (3-stone stove, charcoal stove and sawdust stove) were selected and evaluated. Their performances were compared with those of improved stove. The results show that the time spent in cooking 1 Kg of rice/(yam) is significantly different in all the conventional stoves under test; (maximum 0.75 (0.44) kg/hr for 3-stone stove and minimum 0.61 (0.35) hr/kg for charcoal). Fuel utilization also differs for instance lesser quantity of charcoal would be required to cook the same quantity of food on the charcoal stove than the open fire stove. Also the specific fuel consumption value of charcoal stove is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Wood products & Machinery Cook stove; Fuel consumption; Thermal efficiency; Burn rate. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3037 |
| |
|
|
| Jokiniemi, Heikki Tapani. |
| Combine harvesting is one of the most energy consuming field operations in arable farming. The power demand of combine harvester depends strongly on the mass flow through the machine, and one approach to reduce the energy consumption is thus increasing the stubble height in harvesting. In this study, the energy saving possibilities by increased stubble height and different straw management in cereal harvesting were examined. In addition to combine harvesting, the mulching of the tall stubble with a tractor powered rotary mower after the harvest was investigated. The results indicated an energy saving of 22%–24% in combine harvesting of spring wheat “Quarna” when the stubble height was increased from 13 cm to 35 cm, and 17% with 13 cm stubble when the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Combine harvesting; Cereal; Stubble height; Energy; Fuel consumption; Stubble mulching. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3360 |
| |
|
|
| Monteiro,Leonardo de A.; Albiero,Daniel; Lanças,Kleber P.; Bueno,André V.; Masiero,Fabricio C.. |
| The tire inflation pressure, among other factors, determines the efficiency in which a tractor can exert traction. It was studied the effect of using two tire inflation pressures, 110.4 kPa in the front and rear wheels, 124.2 kPa in the front wheel and 138 kPa in the rear wheels, the energetic efficiency of an agricultural tractor of 147 kW of engine power, in the displacement speed of 6.0 km.h-1, on track with firm surface, with the tractor engine speed of 2000 rpm. For each condition of the tire pressure, the tested tractor was subjected to constant forces in the drawbar of 45 kN and 50 kN, covering 30 meters. It was used a randomized complete block with a 2x2 factorial arrangement (tire pressure and drawbar power) with four replications, totaling 16... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fuel consumption; Slippage; Traction test. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000400015 |
| |
|
|
| Oiole,Yasser A.; Kmiecik,Leonardo L.; Parize,Guilherme L.; Silva,Thiago X. da; Jasper,Samir P.. |
| ABSTRACT The operational performance of the agricultural tractor can be increased by adjusting parameters such as tire inflation pressure, axle mass distribution and gauge opening, which is a very divergent factor in controlled-traffic production. The objective of the experiment was to measure the energy performance of a 93 kW agricultural tractor in intermediate grading operation in two slopes (flat and sloping) and three gauge configurations (closed, intermediate and open) in mobilized soil. Energy performance was determined from the following parameters: slip, engine speed, actual effective speed, hourly and specific fuel consumption; strength, power and performance on the drawbar. Turbo pressure and temperature monitoring was also performed at six... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fuel consumption; Operating yield; Controlled trafic. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000600769 |
| |
|
|
| Almaliki, Salim; Alimardani, Reza; Omid, Mahmoud. |
| Due to the ascending importance of energy in the world, prediction and optimization of Fuel Consumption (FC) in agricultural tasks is merit to consideration. In this study a Massey Ferguson (MF285) tractor was implemented with a low cost and precise data acquisition system as a means to record and monitor the affectual parameters on FC such as forward speed and instant fuel flow rate during field operation. Field experiments were carried out in the experimental farm of Agricultural Engineering Department of Tehran University, Karaj province, Iran, which had loamy soil texture. A mouldboard plow was used as tillage toll during the experiments at various tillage depths, engine speeds, forward speeds, tire inflation pressures, moisture contents and cone... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fuel consumption; Massey Ferguson (MF285); Modelling; Data logging system. |
| Ano: 2016 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3776 |
| |
|
| |
|
| |
|
| |
|
|
| Priour, Daniel. |
| Trawls energy efficiency is greatly affected by the drag, as well as by the swept area regarding pelagic trawls and by the swept width for bottom ones. The drag results in an increase of the energy consumption and the sweeping influences the catch. In order to reduce the drag per swept area (or width) a numerical tool dedicated to the automatic optimisation of the trawl design has been developed. Based on a finite element method model for flexible netting structures, the tool modifies step by step a reference design. For each step the best-modified design, in terms of drag per swept area (or width), is kept. Such a methodology was used in two cases: which show a 43% increase in energy efficiency regarding the pelagic trawl case and 27% for the bottom trawl... |
| Tipo: Text |
Palavras-chave: Swept width; Swept area; Drag; Fuel consumption; Optimisation; Modelling; Trawl; Fishing gears. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6583.pdf |
| |
|
|
| Guillen, Jordi; Cheilari, Anna; Damalas, Dimitrios; Barbas, Thomas. |
| World food production has increased substantially in the past century, thanks mostly to the increase in the use of oil as input in the production processes. This growing use of fossil fuels has negative effects, both on the environment and the production costs. Fishing is a fuel consuming food production activity, and its energy efficiency performance has worsened over time. World-wide fisheries are also suffering from overexploitation, which contributes to the poor efficiency performance, adding more pressure and criticism on this economic activity. In this paper we analyzed the energy efficiency performance of more than 20,000 European Union (EU) fishing vessels for the period 2002-2008, using the edible energy return on investment (EROI) indicator. The... |
| Tipo: Text |
Palavras-chave: Energy efficiency; Energy return on investment (EROI); Fisheries; Fishing fleet; Fuel consumption; Industrial ecology. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00323/43459/42925.pdf |
| |
|
| |
|
| |
|
|
| Marey,Samy; Aboukarima,Abdulwahed; Almajhadi,Yousef. |
| ABSTRACT This study examines the capability of an artificial neural network (ANN) approach using a backpropagation-learning algorithm to predict performance parameters for a chisel plow at three field sites with differing soils. The draft force, effective field capacity (EFC), fuel consumption rate (FC), overall energy efficiency (OEE), and rate of plowed soil volume (SVR) were predicted at varying plowing speeds, plowing depths, soil moisture contents, soil bulk densities, soil texture indexes, and tractor powers. Collected field data was divided into a training set (for predicting the required parameters) and testing set (for model validation). For the ANN algorithm, the number of hidden layers, neurons, and transfer functions were varied to construct... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Backpropagation-learning algorithm; Draft; Fuel consumption; Overall energy efficiency. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000600719 |
| |
|
|
| Grotta,Danilo C. C.; Furlani,Carlos E. A.; Silva,Rouverson P. da; Lopes,Afonso; Reis,Gustavo N. dos. |
| The purpose of this work was evaluating the energetic demand of a seeder-fertilizer machine as a function of the type and handling of vegetal covering culture and of the fertilizer deposition shank depth. A Valtra BM100 tractor was used implemented to pull a high precision seeder-fertilizer machine with four ranks of seeding, spaced 0.9 m for maize culture. Experiment was conducted with design in randomized blocks in factorial plots, in the Laboratory of Machines and Agricultural Mechanization experimental area (LAMMA) of UNESP-Jaboticabal, using two covering cultures (black-mucuna and crotalaria), three handlings of this covering, two mechanical (straw crusher and roller knife) and one chemical (pulverization of herbicide), performed 120 days after... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fuel consumption; Knife roller; Traction force. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162009000200007 |
| |
|
|
| Rahmanian- Koushkaki, Hossein; Karparvarfard, Seyyed Hossein; Mortezaei, Alireza. |
| A microcontroller based instrumentation package was designed, developed and mounted on an 81 kW Massey Ferguson 399 (MF-399) tractor. This package continuously measures and monitors various performance parameters of the tractor and implement. These parameters were: actual forward speed, theoretical forward speed, slip, fuel consumption and implement draft. The package comprised of four components: power supply, transducers, data acquisition, and display unit. Power was taken from the tractor battery. The data acquisition system was capable of scanning the data at 0.1 s intervals. The system performed well during the field operations and the results obtained showed that the accuracies of the transducers were acceptable. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Data acquisition; Draft; Fuel consumption; MF-399 tractor; Microcontroller. |
| Ano: 2015 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3029 |
| |
|
| |
| Registros recuperados: 21 | |
|
|
|
