Template-Type: ReDIF-Article 1.0 Author-Name: M. Müller Author-Workplace-Name: Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Mechanical properties of composite material reinforced with textile waste from the process of tyres recycling Abstract: The paper deals with the polymeric fibre composite with the reinforcement on the basis of the waste from the process of the tyres recycling. The aim of the research was the use of the material of cleaned textile waste from the process of the tyres recycling. The secondary waste raw material was used as filler in the composite. The subject of performed experiments was the polymeric composite, whose continuous phase was in a form of a two-component epoxy adhesive (GlueEpox Rapid) and a discontinuous phase in a form of microfibers from the process of tyres recycling. The experiments results proved that the composite materials based on the textile waste from the process of the tyres recycling reached an increase of an impact strength, a tensile lap-shear strength and an elongation of the adhesive bond (to 2.5% vol.). The textile microfiller has a negative influence on the tensile strength and elongation of adhesives. Keywords: epoxy resin, quality testing, microfiber, testing Journal: Research in Agricultural Engineering Pages: 99-105 Volume: 62 Issue: 3 Year: 2016 DOI: 10.17221/32/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/32/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201603-0001.txt Handle: RePEc:caa:jnlrae:v:62:y:2016:i:3:id:32-2015-RAE Template-Type: ReDIF-Article 1.0 Author-Name: L. Špokas Author-Workplace-Name: Institute of Agricultural Engineering and Safety, Faculty of Agricultural Engineering, Aleksandras Stulginskis University, Kaunas, Lithuania Author-Name: V. Adamčuk Author-Workplace-Name: Institute of Agricultural Engineering and Electrification, National Scientific Centre, National Academy of Agrarian Science of Ukraine, Kiev, Ukraine Author-Name: V. Bulgakov Author-Workplace-Name: Department of Mechanics and Resistance Materials, Mechanical and Technological Faculty, National University of Life and Environmental Sciences of Ukraine, Kiev, Ukraine Author-Name: L. Nozdrovický Author-Workplace-Name: Department of Machines and Production Biosystems, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Title: The experimental research of combine harvesters Abstract: The paper presents results of the experimental research of a middle-size combine harvester when used for harvest of winter wheat and spring barley in heavy harvest conditions. Based on the results obtained, it was possible to determine the effect of field conditions on the crop mass flow in combine harvester, grain losses, fuel consumption, and combine harvester field performance. It was found that grain moisture content and conditions of the crop stand have a significant effect on the work indicators of the combine harvester when compared with its technological parameters and crop mass flow. Keywords: grain losses, fuel consumption, combine harvester field performance Journal: Research in Agricultural Engineering Pages: 106-112 Volume: 62 Issue: 3 Year: 2016 DOI: 10.17221/16/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/16/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201603-0002.txt Handle: RePEc:caa:jnlrae:v:62:y:2016:i:3:id:16-2015-RAE Template-Type: ReDIF-Article 1.0 Author-Name: M. Kavka Author-Workplace-Name: Department of Machinery Utilization, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: M. Mimra Author-Workplace-Name: Department of Machinery Utilization, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Author-Name: F. Kumhála Author-Workplace-Name: Department of Agricultural Machines, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic Title: Sensitivity analysis of key operating parameters of combine harvesters Abstract: The sensitivity analysis of key operating parameters on the average annual sub-profit in a group of three combine harvesters operating in companies providing agricultural services were analysed. Based on the results of the cost analysis, the following key operating parameters with the greatest influence on the costs were identified: the purchase price of the machine, the price of fuel, maintenance costs, personnel costs and annual performance. These parameters were used in the sensitivity analysis to investigate their effect on unit costs. Changing the above-mentioned parameters is calculated within ± 30% from their mean value. To perform a sensitivity analysis of the average annual sub-profit of combine harvesters, the unit price of mechanized work was additionally used. The results showed that greatest impact on both the average annual earnings of combines operation and on the changes in unit cost was those of the annual performance of the combine harvester, combine harvester purchase price and the cost of fuel. On the other hand, maintenance and personnel costs had a smaller influence concerning these changes of parameters. Keywords: annual performance, costs optimization, unit costs, cost analysis, average annual sub-profit Journal: Research in Agricultural Engineering Pages: 113-121 Volume: 62 Issue: 3 Year: 2016 DOI: 10.17221/48/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/48/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201603-0003.txt Handle: RePEc:caa:jnlrae:v:62:y:2016:i:3:id:48-2015-RAE Template-Type: ReDIF-Article 1.0 Author-Name: I. Vitázek Author-Workplace-Name: Department of Transport and Handling, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: D. Michalíková Author-Workplace-Name: Department of Transport and Handling, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: B. Vitázková Author-Workplace-Name: Department of Machines and Production Systems, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: J. Klúčik Author-Workplace-Name: Department of Transport and Handling, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Title: Emission load of car service interiors Abstract: Car service centres are specific in terms of production of pollutants. The aim of the paper is to assess the quality of indoor environment of car service interiors with respect to the safe range of oxocarbon emission limits, concentration of gaseous and solid aerosols of selected chemical pollutants and occupational noise exposure. Measurements of concentration and exposure time indicated that the permitted limits were kept. CO concentration reached values in the range from 0 to 10 ppm, CO2 concentration was observed in the range from 493 to 967 ppm. Concentration of solid aerosol of polyester bitumen reached the maximum value of 0.37 mg/m3, while for gaseous aerosol (e.g. toluene) it equalled 8.114 mg/m3. Measurements of chemical factors were carried out and evaluated by companies with appropriate accreditation. Occupational Exposure Limits (OELs) were higher in case of all selected substances. OEL was not demonstrably exceeded at any chemical factor. Noise emissions approached the limit values; therefore, hearing protection is required. Keywords: indoor environment, gaseous emissions, chemical factor, emission limits, noise Journal: Research in Agricultural Engineering Pages: 122-128 Volume: 62 Issue: 3 Year: 2016 DOI: 10.17221/5/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/5/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201603-0004.txt Handle: RePEc:caa:jnlrae:v:62:y:2016:i:3:id:5-2015-RAE Template-Type: ReDIF-Article 1.0 Author-Name: R.A. Chayjan Author-Workplace-Name: Department of Biosystems Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran Author-Name: S.A. Radmard Author-Workplace-Name: Department of Biosystems Engineering, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran Title: Moisture and thermal diffusivity of lentil seed under convective infrared-microwave: Modelling with and without shrinkage Abstract: The effect of infrared radiation and microwave radiation on the moisture and thermal diffusivity characteristics of lentil seeds during infrared and microwave drying was investigated. Using mathematical equations, values and curves, moisture and thermal diffusivity were obtained. This study was to determine the moisture and thermal diffusivity of seed lentil with and without shrinkage at input temperatures 40°C and 60°C, infrared powers 1,000 W and 2,000 W and microwave power 270 W and 450 W, when the moisture content was reduced from 60 to 9% (d.b.). Drying rate was increased with increased air temperature, infrared radiation and microwave powers. Also drying rate decreased continuously with decreasing moisture content. The calculated values of moisture diffusivity by considering shrinkage were smaller than the values of moisture diffusivity without considering shrinkage. Moisture diffusivity with and without shrinkage decreased with decrease in moisture content of lentil seeds and thermal diffusivity with and without shrinkage decreased with increased moisture content. Both moisture and thermal diffusivity values decreased with increase in temperature. Keywords: infrared radiation, equilibrium content, Fick's second equation, drying rate, dehydration Journal: Research in Agricultural Engineering Pages: 129-140 Volume: 62 Issue: 3 Year: 2016 DOI: 10.17221/24/2014-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/24/2014-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201603-0005.txt Handle: RePEc:caa:jnlrae:v:62:y:2016:i:3:id:24-2014-RAE Template-Type: ReDIF-Article 1.0 Author-Name: A. Smejtková Author-Workplace-Name: Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of life Sciences Prague, Prague, Czech Republic Author-Name: P. Vaculík Author-Workplace-Name: Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of life Sciences Prague, Prague, Czech Republic Author-Name: M. Přikryl Author-Workplace-Name: Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of life Sciences Prague, Prague, Czech Republic Author-Name: Z. Pastorek Author-Workplace-Name: Department of Technological Equipment of Buildings, Faculty of Engineering, Czech University of life Sciences Prague, Prague, Czech Republic Title: Rating of malt grist fineness with respect to the used grinding equipment Abstract: Grain size distribution of grist is dependent on the type of grinding mill. The most widely used crushers used for malt grinding are roll grinding machines and dispersants are the disc mills. For rating of grist fineness grists made in the two-roller mill KVM 130/150 and dispersant the disk mill Skiold SK 2500 was used. The selected types of barley malt were processed: light malt, Munich malt, caramel malt and colouring malt. Rating of malt grist fineness was made with a help of sieve analysis using a "Pfungstadt sifter". Conclusions from the measurements are as follows: by using the two-roller mill the coarsest grist is got from caramel malt and the finest malt from the light malt. The dispersant was processing grist at a speed of 1,500 rpm and 2,800 rpm. For each speed, the coarsest grist was obtained from caramel malt and the finest grist was obtained by crushing colouring malt. Keywords: milling of malt, two-roller mill, dispersant, sieve analysis, grinding fineness Journal: Research in Agricultural Engineering Pages: 141-146 Volume: 62 Issue: 3 Year: 2016 DOI: 10.17221/41/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/41/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201603-0006.txt Handle: RePEc:caa:jnlrae:v:62:y:2016:i:3:id:41-2015-RAE Template-Type: ReDIF-Article 1.0 Author-Name: P. Hlaváč Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: M. Božiková Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: Z. Hlaváčová Author-Workplace-Name: Department of Physics, Faculty of Engineering, Slovak University of Agriculture in Nitra, Nitra, Slovak Republic Author-Name: K. Kardjilova Author-Workplace-Name: Department of Physics, Faculty of Marine Sciences and Ecology, Technical University of Varna, Varna, Bulgaria Title: Changes in selected wine physical properties during the short-time storage Abstract: This article is focused on the effect of temperature and short-term storage on the physical properties of wine made in Slovakia. All measurements were performed during temperature manipulation in the temperature interval approximately from 0°C to 30°C. Two series of rheologic and thermal parameters measurements and one of electric parameter were done. First measurement was done at the beginning of storage and then the same sample was measured after a short storage. Temperature relations of rheologic parameters and electric conductivity were characterized by exponential functions, which is in good agreement with the Arrhenius equation. In case of thermal parameters linear relations were obtained. The graphical dependency of wine density on temperature was described by decreasing polynomial function. The temperature dependencies of dynamic and kinematic viscosity have a decreasing character. The fluidity, thermal conductivity, thermal diffusivity, and electrical conductivity increased with the temperature. It was found out that short-term storage had a small effect on measured properties but longer storage could have a more significant influence on selected properties. Keywords: white wine, temperature, density, physical parameters, time of storage Journal: Research in Agricultural Engineering Pages: 147-153 Volume: 62 Issue: 3 Year: 2016 DOI: 10.17221/7/2015-RAE File-URL: http://rae.agriculturejournals.cz/doi/10.17221/7/2015-RAE.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/rae-201603-0007.txt Handle: RePEc:caa:jnlrae:v:62:y:2016:i:3:id:7-2015-RAE