Tag Archives: fuel consumption

33-40 J. Barwicki, S. Gach, K. Koprysz, S. Ivanovs, A. Adamovicsand O. Valainis
Technical and economical analysis of harvesting and ensilaging of corn grain
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Technical and economical analysis of harvesting and ensilaging of corn grain

J. Barwicki¹, S. Gach², K. Koprysz², S. Ivanovs³⋅*, A. Adamovics³and O. Valainis³

¹Institute of Technology and Life Sciences in Falenty, Warsaw Branch, Warsaw, Poland 2Department of Production Engineering, Warsaw Agricultural University – SGGW, Warsaw, Poland 3Latvia University of Agriculture, Research Institute of Agricultural Machinery, Ulbroka, Latvia; *Correspondence: semjons@apollo.lv

Abstract:

Elaborated test results concerning two technologies of corn grain harvesting using grain harvesters. One technology called ZKP was using a mill crusher unit with direct filling system of a plastic bag and the other one was using a mill crusher connected to a silo press and was called ZKG. Provided research and calculations enabled evaluation of the values of critical coefficients, which were the following: unitary fuel consumption and unitary labour cost requirement. Because of different corn grain yields, these values referred to a unitary area of crop and also unitary mass of corn grain. It has been proved that the total costs of harvesting and conservation of corn grain with the technology ZKP equalled 321.83 € ha-1, but the same costs with the technology ZKG equalled 245.69 € ha-1. However, when taking into consideration the unitary mass of harvested grain, lower costs appeared with the technology ZKP at the value 21.89 € t–1 compared to the 31.02 € t–1 for the technology ZKG.

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197-204 M. Pexa, J. Mařík, K. Kubín and K. Veselá
Impact of biofuels on characteristics of the engine tractor Zetor 8641 Forterra
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Impact of biofuels on characteristics of the engine tractor Zetor 8641 Forterra

M. Pexa¹*, J. Mařík¹, K. Kubín² and K. Veselá¹

¹CULS-Czech University of Life Sciences Prague, Faculty of Engineering, Kamycka 129, 16521, Prague 6, Czech Republic; *Correspondence: pexa@tf.czu.cz
²VUZT-Research institute of Agricultural Engineering p.r.i.; Czech Republic

Abstract:

The European Union currently pays great attention to the possibilities for the use of biofuels  to  power  mobile  machinery.  The  main  reasons  for  the  promotion  of  biofuels  is  the effort of Member States to reduce dependence on oil imports, efforts to reduce emissions from internal  combustion  engines  and  also  efforts  to  support  agriculture.  As  the  best  substitute  for diesel, promoting fatty acid methyl ester, namely in the Czech conditions rapeseed methyl ester (RME). Requirements for diesel fuel are the norm ČSN EN 590 and prescribes requirements for RME standard ČSN EN 14214. At present, based on the requirements of EU directives there is a  mandatory  addition  of  methyl  ester  in  diesel  of  a  maximum  volume  fraction  of  7%.  This blended fuel complies with ČSN EN 590 and can be used without any modification to existing diesel engines. Production of methyl ester of fatty acids is energy intensive and therefore offer, with the allowance made for the structural adjustment of the combustion engine, the possibility to use a mixture of diesel fuel and oil directly. In this paper they are compared on the basis of the  complete  characteristics  of  the  engine  performance  parameters  (torque  and  engine  power) and  minimum  specific  fuel  consumption.  Based  on  standardised  test  NRSC  (non-road  steady cycle)  are  also  compared  smoke  and  fuel  consumption  of  the  internal  combustion  engine  of  a Zetor 8641 Forterra tractor (tractor has worked less than 100 hours). As the fuel is a mixture of different ratios of selected diesel with rapeseed oil, jatropha curcas oil and rapeseed oil methyl ester.

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79–89 A. Strakšas
Development of a stripper-header for grain harvesting
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Development of a stripper-header for grain harvesting

A. Strakšas

Institute of Agricultural Engineering Lithuanian University of Agriculture, Institute St. 20, LT-54132 Raudondvaris, Kaunas r., Lithuania; e-mail: anicetas@mei.lt

Abstract:

Crop stripping technology has not been investigated in Lithuania until 2000 as there were no devices for this technology. The paper includes the scheme of a designed and manufactured experimental device (hereinafter ‘stripper’), applied to crop ear stripping technology, and describes its operation principle. The results of operation and comparative tests are presented. Energetic indices of traditional and ear stripping technology were defined. It was determined that when the operating speed of the harvester with a stripper increased, the grain losses of wheat and barley stripping decreased. When stripping and threshing wheat, the operating speed of the harvester has no impact on grain threshing-separating losses. When stripping barley, it has a small impact: if the speed increases, the losses also increase insignificantly but do not exceed the permissible limit. When comparing ear stripping technology with the traditional crop harvesting one, the harvester output is twice as high as that in the first technology: 40% of fuel is saved.

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181–186 D. Kehayov, Ch. Vezirov and At. Atanasov
Some technical aspects of cut height in wheat harvest
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Some technical aspects of cut height in wheat harvest

D. Kehayov¹, Ch. Vezirov² and At. Atanasov²

¹Agrarian University – Plovdiv, Mendeleev Street 12, 4000 Plovdiv, Bulgaria;
e-mail: d2k@au-plovdiv.bg
²University of Rousse, Studentska street 8, 7017 Rousse, Bulgaria;
e-mail: vezirov@ru.acad.bg, aatanasov@ru.acad.bg

Abstract:

In order to determine the most appropriate cut height of wheat harvest, it is necessary to take into consideration not only the agronomical aspects, but some technical factors as well. In this research, the influence of cut height of harvest on the accounted losses and the fuel consumption of a combine harvester has been considered. It has been shown that the increasing of cut height up to straw-level in the threshed wheat mass 0.24 does not lead the accounted losses of the combine “CLAAS DOMINATOR – 106” over the permissible limits, without a necessity to install additional equipment on the machine. With such a technical solution, a decrease of fuel consumption of up to 30% can be achieved.

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