1. Economic viability of alternative bedding material in broiler chicken farmingJernej Prišenk, Maksimiljan Brus, 2022, original scientific article Abstract: The aim of this paper is to assess the economic viability of two different bedding materials used in broiler chicken farming processes. The materials considered are wood shavings and slice-dedusted straw. The slice-dedusted straw is considered an alternative type of bedding material produced by a company from Slovenia. While the technological and economic assessment of this type of bedding material has already been researched in the case of horse breeding, it is something new in the case of broiler chicken farming. Data collection is structured from two trials. Trial one (T1) is also known as daily observations, and trial two (T2) involves obtaining input data at the end of the fattening period. During T1, daily observations are focused on collecting data from technical characteristics, and in T2, the percentage of death proportions and average increments are observed, calculated, and considered as economic input data. The cost calculation model is used for the calculation of several different technical-economic indicators, which denote the influence of different bedding materials no economic production viability. Favorable economic results were found for slice-dedusted straw, which shows that this kind of alternative bedding material could be the better option.
Keywords: bedding materials, feasibility analysis, broiler chicken, cost calculation model
Published in DKUM: 02.07.2024; Views: 111; Downloads: 18
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2. Energo-economics payback investment calculation modelling of gas-steam combined cycle power plantDušan Strušnik, Jurij Avsec, 2022, original scientific article Abstract: The paper deals with energo-economic payback calculation modelling of the combined gassteam cycle operation, demonstrating the basic characteristic properties of cycle behaviour in different operating regimes and calculating the payback period of the investment. The calculation of the payback period of the investment is based on the calculation of the net present value and with actual obtaining data sets from a recently built gas-steam combined cycle power plant. The results of the calculation modelling show that the gas-steam combined cycle power plant can achieve a useful efficiency of up to 88% in the back-pressure operation of the steam turbine. The useful efficiency of the gas turbine is up to 40%. The payback period of the investment depends on the investment costs, the quantity and market price of the consumed fuel, the quantity and market price of the generated electricity and thermal energy. The results show that with a price ratio fuel/electricity of 0.36, the payback period of the investment is 4 years, with a price ratio fuel/electricity of 0.54, the payback period of the investment is as much as 17 years.
Keywords: calculation, efficiency, investment, market, modelling, payback
Published in DKUM: 30.10.2023; Views: 503; Downloads: 5
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3. Input parameter analysis for electrified powertrain configurator : diplomsko deloTilen Antonio Čučko, 2020, undergraduate thesis Abstract: The basis of this thesis is the tool for power train calculation of battery electric vehicles. With the help of extensive tests and analysis, we discovered the room for possible improvements, which allowed us to upgrade the tool with a better and wider data field. Therefore, the tool is easier for engineers and various users to handle. In addition, we have separated the input file from the solver, which allows safer sharing of the documents, and equipped the input interface with additional logic for handling of wrong inputs. Furthermore, the guidance and tips for the users and additional inputs for alternative data have been added. Comparing the new tool and interface with the previous one, there are significant benefits regarding data accuracy and the difficulty level of its management.
Keywords: Battery electric vehicles, power train, power train calculation
Published in DKUM: 01.12.2020; Views: 1462; Downloads: 11
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5. Thinking in costs and revenues – calculating prices and controlling costsEdeltraud Günther, Daria Meyr, 2016, independent scientific component part or a chapter in a monograph Abstract: In contrast to the investment calculation, that has a project-related, cross-period view the cost accounting refers to individual time slices (meaning usually month, quarter or year ) and is more position oriented, respectively division oriented.
Keywords: costs, revenues, calculation, controlling, ecology
Published in DKUM: 11.05.2018; Views: 1120; Downloads: 99
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6. Environmental management & audit 3: Controlling and stakeholders : Tempus project Recoaud2016, scientific monograph Abstract: The present scientific monograph, entitled “Environmental management & audit“, is the result of three years’ work on an international project entitled “Environmental management in Russian companies – retraining courses for the sensibilization for and integration of Eco-Audit programs in corporate decision-making (RECOAUD)”. Within its more than 600 pages, the monograph features interesting texts written by 31 authors from the European Union and the Russian Federation, edited by dr. Borut Jereb, Darja Kukovič and dr. Daria Meyr.
The monograph “Environmental management & audit“ is composed of four books: “Scarcity and Introduction of Environmental Management”, “Management Systems”, “Controlling and Stakeholders”, and “Environmental Assessment” (Featured Articles). These four topics reflect the complexity, heterogeneity and multidisciplinary of the project Tempus RECOAUD.
The reader of the monograph gets a comprehensive overview of theoretical perspectives of environmental management and audit in the chosen areas. Furthermore, the monograph also highlights the results of research in the field of environmental management and audit as well as trends and challenges in the development of this field. Providing insight into theoretical and research findings, the monograph will prove useful to both practitioners and researchers in the field of environmental management and audit; it can also be used for study purposes.
Keywords: logistics, environmental protection, alternatives, cost calculation, cost control, competitive constraints, stakeholders, performance indicators, environmental reports
Published in DKUM: 09.05.2018; Views: 1345; Downloads: 91
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7. Estimating truck operating costs for domestic trips : case studies from GreeceEleftherios Sdoukopoulos, Maria Boile, Afroditi Anagnostopoulou, 2015, original scientific article Abstract: The transport sector represents a vital component of national economies and has significant impacts on productivity and social welfare. In 2012, the transport sector in Europe was estimated to account for 3.7% of the European Gross Domestic Product (GDP) and 5.1% for employment. Road transport proves to be the predominant mode for moving goods within Europe holding a share of approximately 45.8% in 2012 (in ton-kms). In Greece, the share of road freight transport is significantly higher (98%) indicating the importance of this sector for the Greek economy. To this end and considering the existing needs of road freight transport operators in Greece, the objective of this research is to establish an analytical and documented basis for estimating the operating cost of a truck on specific urban or national freight transport routes. To achieve this goal, an extended literature review has been conducted resulting in the identification of the main components comprising the total truck operating cost, which were then updated and validated through a series of personal interviews with selected road freight transport professionals. An excel-based application tool was also developed in order to facilitate operating cost estimates for different cases, through selection of the proper values of the relevant parameters. The resulting tool was used to analyse four test cases, which demonstrate the tool’s usability and applicability. Results from this analysis have been also validated by industry experts and they reflect real-world transport scenarios.
Keywords: cost calculation tool, road freight transport, truck operating costs
Published in DKUM: 17.11.2017; Views: 1490; Downloads: 313
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8. Calculation model for pre-stressed bolted joints of slewing bearingsPéter Göncz, Srečko Glodež, 2009, original scientific article Abstract: The presented paper describes a calculation model for pre-stressed bolted joints used to connect slewing bearings to the adjacent structures. A classical pre-stressed bolted joint calculation model is described and its insufficiencies for direct application on slewing bearings are pointed out. Finally, the suggested stress analysis is done by modelling the most loaded single bolt segment of the slewing bearing assembly, applying the preload and the working load on it. The stress determination in the bolt is done by finite element analysis.
Keywords: preiskava materialov, vijačne zveze, aksialni ležaji, dimenzioniranje, matematični modeli, materials testing, bolted joints, slewing bearings, dimensioning, calculation models
Published in DKUM: 10.07.2015; Views: 2217; Downloads: 86
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