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W artykule przytoczono analizę stosowanych w teorii środków transportowych zależności opisujących opory przetaczania podwozi kołowych i gąsienicowych. Wykazano, że dotychczasowe badania naukowe nie uwzględniają osobliwości odkształcanej gleby przy cyklicznych obciążeniach układami jezdnymi podwozi. Określono zależności oporów przetaczania układów jezdnych od parametrów eksploatacyjnych. Przedstawione...
The article expounds the research results of two ploughing machine and tractor aggregates (МТА). One of them consisted of a tractor HTZ-16131, a front-mounted double-furrow and a rear-mounted four furrow ploughs (the scheme «push-pull» «2+4»), but the other - of the same tractor and a five furrow rear-mounted plough (the scheme «0+5»). The obtained experimental data indicate that the working width...
This paper presents the results of tests of the densification process of a mixture of plant-type post-harvest tobacco waste and a mixture of post-harvest tobacco waste and a binder in the form of potato pulp. Initial densification tests were carried out on a modernized SS-3 stand, with a working system of the “open densification chamber-densifying piston” type, employing an open chamber with a diameter...
In this paper the results of automated, vision based classification of oak seeds viability i.e. their ability to germinate are presented. In the first stage, using a photo of the seed cross-section, a set of feature vectors were determined. Then three classification methods were examined: k-nearest neighbours (k-NNs), artificial neural networks (ANNs) and support vector machines (SVMs). Finally, a...
The article presents the results of tests of the impact of material and process parameters of the process of non-pressure pelleting of post-production nettle waste generated by the Herbapol plant in Białystok. The pelleting process was performed using a mixing-pelleting-dosing system that comprised a system that supplied the plant material to the densifying system of the pelleting and briquetting...
The use of after-failure equipment repair strategies in the chewing gum factory in the period 1996-2003 implied their low efficiency and productivity; OEE during this period amounted to approximately 46%. The introduction of TPM contributed to the increase, in the years 2004-2015, of indicator of equipment effectiveness OEE on average by 28%. MTBF, which is a measure of the time between failures,...
The dissertation includes an analysis of the consumption of final energy for heating 73 educational facilities situated in rural areas of the Kraków poviat. Calculating the unit rate for final energy demand EK w kWh/m2 was carried out applying two methods, according to the methodology of estimating the energetic performance of buildings. The value of the unit rate for the final energy demand EK depends...
This study presents a new method developed for the valuation of technical feasibility of servicing for agricultural machines based on economic criteria. Moreover, the developed method was verified empirically while analysing selected agricultural tractors. For this reason values of the serviceability index were determined in relation to prices of agricultural tractors. results among the tested tractors...
The objective of the paper was to determine the amount and quality of the obtained biogas on the fermentation medium from the selected substrates of agri-food industry. The need to reduce the use of traditional energy and the growth of interest in RES is related to searching for alternative energy sources. To some extent they are to secure the national energy economy. Biogas installations are the...
The objective of this paper was to report a characterization of NH3, N2O and CH4 concentrations and emissions from a commercial poultry farm under Polish conditions. The research was conducted in the deep litter/slatted floor poultry house in Greater Poland Region, where breeding hens (line ROSS 308) were housed. During 18 months, for 13 selected days the temperature and the concentration of NH3,...
The aim of this study was to assess technical feasibility of servicing for modern agricultural tractors. Labour intensity of technical service during the entire servicing cycle was adopted as a measure of serviceability for agricultural tractors. Among tractors included in this study the lowest labour intensity of technical service (Pst= 25 h) was observed for Forterra 105 tractors by Zetor.
This paper presents results of research on the need for transportation services and their forms. Based on a conducted survey it might be stated that 59.04% of farmers see a need for transportation service and the share in answers increases along with an increase in age of the respondents (50% for group A and 68.18% fro group C). 46.94% of respondents point to time savings as the most common reason...
The paper aims at determining the relationship between age and degree of wear of selected technical fixed assets in farms. The correlation and regression analyses were performed for age as an independent variable and physical wear and functional wear as dependent variables. The research comprised 90 farms in southern Poland and focused mainly on farm buildings and mechanical equipment used in the...
The complexity of the deposit formation process on the components of compression ignition engine, including high-pressure injection Common Rail systems, is gaining global significance. Knowledge related to the mechanisms of their formation and chemical composition is still insufficient and requires further studies. The studies allowed, hypothetically, assuming several mechanisms of their formation,...
Assessment of viability of oak seeds is mainly performed by mechanical scarification followed by visual assessment by trained employees. This procedure is slow and prone to human errors, thus automation of this process is desirable. Shortening the design of complex automation systems requires the use of modern methods, allowing for modeling and simulation of systems containing elements of mechanical,...
The aim of the study was to investigate the effect of season on the concentration of odours in mechanically ventilated deep-litter piggery. In studied facility growing-finishing pigs were kept (25-110 kg). The study included five production cycles. In the period from July 2013 to February 2015 46 series of measurements were made. During the study a total of 92 air samples were collected. The sampling...
An energy and economic efficiency audit of lighting systems in three options, i.e. high pressure sodium discharge lamps, lamps with LED type luminaires powered from the grid and a lighting system with an autonomous power supply i.e. a hybrid lamp (with a LED type luminaire) powered by electricity generated by photovoltaic panels and a wind turbine was per-formed for a sample rural commune for which...
This paper presents the results of tests of selected mechanical properties of parts made from injection molded polypropylene (PP). Parts made from primary (pure) 100 [%] PP as well as parts made from 100 [%] regrind were used for the tests. Discussed was the problem of using reground material in injection molding. Attention was paid to the apparent lack of adverse influence of regrind on the assessed...
In 2009, meat preserves were produced by approximately 2700 plants in Poland. Used in the process of production and processing of meat, raw materials are not fully utilized and this results in the formation of by-products in the form of remnants of unused raw materials and different types of waste (which is the consequence of the operation of machinery, buildings and devices). The ultimate purpose...
It has been shown, that during the investigated period of 2006-2013 in all analyzed regions of Poland: north-west, south-west, north-east and south-east, the majority of purchased tractors was in the power group of: 75-90 and 90-118 kW and, approximately, about half fewer within the groups of power 75-90 and 90-118 kW. However, in the Western Poland, especially in the south-east region, much more...
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