Acta Technologica Agriculturae最新文献

{"title":"Thermoeconomic Analysis of Organic Rankine Cycle From Napier Grass Biomass","authors":"D. Permana, D. Rusirawan, I. Farkas","doi":"10.2478/ata-2023-0014","DOIUrl":"https://doi.org/10.2478/ata-2023-0014","url":null,"abstract":"Abstract The organic Rankine cycle (ORC) power plant is derived from a centrifugal chiller air conditioning system as an alternative to a diesel replacement modular power plant due to its low cost compared to ORC’s manufacture. Biomass is used as a heat source for the power plant to utilize a vast amount of biomass in Indonesia. Research is performed by designing an ORC with biomass that produces around 200 kWe. Simulation done by Microsoft Excel and Reference Fluid Thermodynamic and Transport Properties Database (Lemmon et al., 2013) add-on from the National Institute of Standard Technology (NIST) is used to simulate operating conditions and performance parameters to find a suitable specification of an HVAC system to be modified as an ORC with biomass fuel. Furthermore, based on input from the simulation result and assumptions, other simulation is performed to define operating conditions and types of working fluids, giving the lowest purchase equipment cost. The operating condition analysis of working fluids shows that R123 and R245fa are suitable to be utilized as a potential working fluid for ORC power plants with biomass fuel.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43630359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Flat Spray Nozzle for Intra-Soil Application of Liquid Mineral Fertilizers","authors":"Khozhakeldi Tanbayev, S. Nukeshev, T. Engin, Bakhitbek Saktaganov","doi":"10.2478/ata-2023-0009","DOIUrl":"https://doi.org/10.2478/ata-2023-0009","url":null,"abstract":"Abstract This paper deals with the investigation of the performance of a nozzle used for intra-soil application of liquid mineral fertilizers (LMF), determination of the range of spray angle, fall angle, droplet size, spray distribution characteristics, and substantiation of its dependence on the nozzle design parameters. The proposed nozzle has a jet-impact channel and deflector slot design with very compact overall dimensions. It can be mounted on a deep tillage knife (wing) with a height of 12–14 mm and provides flat fan spray with a high spraying angle. The following range of effective parameters has been determined: the feed channel diameter is 1–1.6 mm, the slot height is 0.35–0.7 mm, and impact surface diameter 5–8 mm. The resultant spray angle is 170–175°, and the fall angle diapason is 5–10°. These parameters contribute to determination of the tillage knife design parameters such as knife height and the height of spray window, as well as the nozzle installation parameters such as t, n and m in future studies. The results can be useful for nozzle industries, particularly in developing the flat fan nozzles with wide spray angle. Overall, the nozzle design is applicable to use for intra-soil application of liquid mineral fertilizes with deep tillage knives.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47123305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Creating Wear-Resistant Layers on 41CrAlMo7 Steel Using Tig Surface Remelting","authors":"R. Mikuš, I. Kovač, J. Žarnovský, Juraj Baláži, Katarzyna Midor","doi":"10.2478/ata-2023-0012","DOIUrl":"https://doi.org/10.2478/ata-2023-0012","url":null,"abstract":"Abstract The article deals with the process of surface remelting of steel 41CrAlMo7 by electric arc (TIG) in the presence of powders with a defined chemical composition. Commercially available powders Pulnierpulver based on calcium cyanamide (CaCN2) (source of nitrogen) and Durborit G based on boron carbide B4C (source of boron) were remelted. The effect of remelting on the change of microstructure in the remelted area was examined to achieve an increase in hardness and resistance to abrasive wear. The measurements of the hardness of HV 1 were carried out, as well as determination of resistance to abrasive wear on the abrasive cloth with Al2O3 particles. The microstructures of remelted layers were observed by LOM and details by SEM. By remelting the examined steel, a significant increase in hardness and resistance to abrasive wear was achieved to a depth of up to 1.5 mm from the surface. An almost four times increase in hardness and an almost two times increase in wear resistance was found when remelting the Pulnierpulver powder, or more than three times increase in hardness and more than 1.5 times increase in resistance to abrasive wear when remelting the Durborit G powder compared to steel without remelting. The presented procedure of TIG surface remelting of powders containing a certain element represents a cheap, accessible, and fast way of creating surface layers with increased hardness and wear resistance. The method is applicable for increasing the wear resistance of functional parts of machines for agriculture, earthmoving, etc.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41807996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Determining the Suitability of Various Surface Treatment Methods with the Control of Blasting Time with Respect to the Quality of Powder Coating","authors":"Michal Neškudla, Lukáš Jeníček, J. Malaťák","doi":"10.2478/ata-2023-0013","DOIUrl":"https://doi.org/10.2478/ata-2023-0013","url":null,"abstract":"Abstract The paper is focused on steel surface processing to ensure an improved adhesion of applied powder layer. Mechanical pre-treatment, chemical pre-treatment and their combination were used to compare their results with each other and to find out the pre-treatment that affected the final outcome the most. The final score was determined by the grid method. The outcome displayed a huge mutual dependency between the result and a kind of various surface treatments. The method with no pre-treatment was by far the worst, followed by the mechanical pre-treatment only, followed by the chemical pre-treatment only, and finally by their combination. The time of blasting affects the final outcome. Through the grid method, coating thickness, and aesthetic test it was confirmed that an optimal blasting time of 5 min provides the best outcome.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41605083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Tillage Method on the Nutrient Regime of Soil during the Growing of Trifolium pratense","authors":"I. Dudar, I. Shuvar, H. Korpita, V. Balkovskyi, Bogdan Shuvar, A. Shuvar, R. Kropyvnytskyi","doi":"10.2478/ata-2023-0004","DOIUrl":"https://doi.org/10.2478/ata-2023-0004","url":null,"abstract":"Abstract The article presents the results of studying the influence of tillage methods on the number of bacteria and fungi in the arable soil layer, nutrient indicators, and, consequently, the yield of Trifolium pratense. The purpose of the study is to determine how tillage affects the feeding regime and yield of Trifolium pratense. The research was conducted at the experimental field of the Educational and Scientific Research Center of Lviv National Environmental University. For the study of microorganisms in the arocenosis of meadow clover, soil samples were taken using a cylindrical drill from arable (0–20 cm) and sub-soil (20–40 cm) layers with an average weight of an individual sample of 300 g. For microbiological analysis, average samples from five individual samples were prepared. The isolation of the main agronomically useful groups of microorganisms from the soil was carried out by the method of microbiological sowing of soil extracts on solid nutrient media: for fungi – wort-agar, for bacteria – meat-peptone agar (MPA). The dilution of the soil extract for fungi and bacteria was, respectively, 1 : 1000; 1 : 100000. Microbiological seeding was performed in triplicate. The calculation of the total number of microorganisms in the soil was carried out by Tepper´s method. The yield of crops and the results of laboratory studies were processed by the method of variance analysis. The application of a tiered tillage allowed to increase the yield of Trifolium pratense green mass by 4.5 t·ha−1 (+17.0%) compared to the control (conventional plowing). It is established that tier ploughing with the PYA-4-40 plough promotes uniform distribution of nutrients in the arable soil layer and formation of homogeneous soil fertility. In such a soil environment, much more favorable conditions are created for the development of microflora and more intensive microbiological processes compared to the options of chisel and conventional (control) tillage, and, consequently, the formation of high yields of green Trifolium pratense.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47859494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Possibilities of Noise Load Elimination in Production","authors":"M. Žitňák, J. Lendelová, Zuzana Pivarčiová, M. Korenko, P. Kiełbasa, P. Dostál","doi":"10.2478/ata-2023-0006","DOIUrl":"https://doi.org/10.2478/ata-2023-0006","url":null,"abstract":"Abstract In a pleasant and healthy work environment, employees are able to fully devote themselves to work, which is reflected in their work performance and a positive approach to work. This research paper focuses on changing the management approach of a selected company to physical factors of the work environment. The focus was targeted at looking for possibilities to change the work environment, which would create wellbeing for its employees, as well as to the exposure of a worker to noise in the work environment and the possibility of its elimination in a particular manufacturing plant. Based on measurements it was found out that the noise exposure values on the machinery had been exceeded. Based on the findings, two corrective technical measures were proposed to reduce noise in the workplace. The first technical measure was to cover the ultrasonic welders with acoustic covers; the second was to cover the fixture itself. However, the fixture covering was removed due to several negative effects on labour productivity and increased costs. After the implementation of technical measures, the measurements were taken once again and based on the results, the organizational measures were proposed.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43504238","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of starter and sweetener on the syneresis intensity of fermented milk drink","authors":"T. Brčina, M. Vilušić, Melisa Zahirović","doi":"10.51558/2232-7568.2022.15.2.15","DOIUrl":"https://doi.org/10.51558/2232-7568.2022.15.2.15","url":null,"abstract":"Syneresis represents the appearance of separation of whey on the surface of the product and is considered an important parameter of the quality of fermented dairy products. For the production of the fermented milk drink, kombucha was used as a non-traditional starter. Two sweeteners were used, honey and sucrose.The aim of the work was to examine the influence of starter and sweetener on changes in the subsequent acidity and intensity of syneresis of the samples during storage. The results were compared with a control sample obtained by inoculation with a conventional starter culture. During storage, there was a drop in pH value and an increase in titratableacidity, as a resultof the constant metabolic activity of the microflora and the production of lactic acid in the produced samples. Honey, as a sweetener, had an effect on the lower pH value of the fermented milk drink samples. The analysis of variance showed a statistically significant difference in the titratable acidity results and the intensity of syneresis of the samples during storage.Samples that were produced with kombucha as a starter showed better structure stability during storage and better quality. During storage, sample kb4 showed the best structural stability and the lowest intensity of syneresis.\u0000KEYWORDS:stinging nettle extract;bioactive components;extraction;antioxidant","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91208777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Life Cycle Assessment of a Hybrid Self-Power Diesel Engine","authors":"F. Hashemi, R. Pourdarbani, S. Ardabili, J. L. Hernández-Hernández","doi":"10.2478/ata-2023-0003","DOIUrl":"https://doi.org/10.2478/ata-2023-0003","url":null,"abstract":"Abstract In the present study, an attempt was made to simulate the hybrid self-power generation process from a diesel engine and propose sustainable power-share management for this self-power hybrid electrical-diesel platform from the viewpoints of environmental and economic aspects (life cycle perspective). This concept means that when the engine works at part-load condition, we need to bring the engine operating conditions to optimal load, and along with doing the necessary work, in parallel, the rest of the power be used to generate electricity to be stored in the battery for more consumption in addition to reducing pollution and reducing fuel consumption by moving towards sustainable energy production. This case study examines the differences between using a diesel engine at idle and maximum load conditions when less engine power is required and if using a diesel engine in a diesel-electricity hybrid cycle. According to the obtained results, it can be concluded that to achieve the most negligible environmental impact, a lower share of generating power can be allocated to electricity generation in higher cycles than the share of generating electrical power in lower cycles. In other words, by increasing the engine speed, the amount of power consumption used to generate electricity relative to the power required from the diesel engine should be reduced so that the system suffers the most negligible environmental impact.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48731547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EGC 2023 Conference Announcement","authors":"M. Habuda-Stanić","doi":"10.51558/2232-7568.2022.15.2.33","DOIUrl":"https://doi.org/10.51558/2232-7568.2022.15.2.33","url":null,"abstract":"The abstracts of the papers will be published in the Book of Abstracts of the 1st European GREEN Conference. Papers will be published in the Proceedings or in the supporting journal.All submitted abstracts and papers will undergo an international peer review process.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81301626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Theoretical and Experimental Investigations of the Second Serve of Root Crop Pile Components","authors":"V. Baranovsky, J. Jobbágy, S. Marynenko, M. Pankiv, Roman Komar","doi":"10.2478/ata-2023-0007","DOIUrl":"https://doi.org/10.2478/ata-2023-0007","url":null,"abstract":"Abstract Fodder beet root crops in the autumn-winter period are one of the main types of juicy fodder for dairy livestock. Mechanized harvesting of fodder beet roots is a rather complex and energy-consuming technological process. The criteria that meet the requirements for the operation of root-harvesting machines are first of all the quality of digging and separation of impurities from root crops. The purpose of the work was improvement of the process of mechanized digging of fodder beets by an adapted digging-transport combined working body based on analytical and empirical research of the second feeds of constituent components of the dug pile of root crops. Based on the results of experimental studies, empirical regression equations were developed, which functionally describe the change in the second supply of the excavated components of the pile of root crops, depending on the speed of the root-harvesting machine and the rotation frequency of the drive shaft of the adapted digging-transport combined working body. Based on the comparative analysis, it was found that the discrepancy between the theoretical and approximated experimental values of second feeds is 5–10%. The results of the study are a further step in improving the method of optimizing the parameters of working bodies for digging and cleaning root crops from impurities.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46140396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}