Search

Copyright of Revista Foco (Interdisciplinary Studies Journal) is the property of Revista Foco and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper shows the results obtained from the study on the variables that have the greatest influence on the decision to replace three-phase induction motors, without a defined efficiency class and installed in industrial applications, with IE3 efficiency class induction motors. The work has been carried out on motors with a nominal power of 1.5 kW due to the availability of laboratory tests that have allowed us to accurately quantify the selected study variables. According to IEC 60034-30, between 0.75 kW and 4 kW is the greatest potential for energy savings in electric motors installed within the industrial sector. The tests carried out have made it possible to assess different operating conditions of the motor: direct power supply from the grid, electronic power supply using scalar control, and electronic power supply using direct torque control. The study has focused on three aspects: energy evaluation, assessing the savings potential; economic evaluation, based on indicators such as Payback Period and Net Present Value; environmental assessment, quantifying the impact indicators proposed by the Methodology for Ecodesign of Energy-related Products (MEErP). A sensitivity analysis has been carried out to quantify, through ratios, different operating points from those directly analyzed in the article. [ABSTRACT FROM AUTHOR]

Front of manufacturing process improvement pursuit and the production costs reduction, the assessment of the projects financial feasibility has an important role in decisionmaking within companies. In this environment the lean six sigma methodology is increasingly strong aid in the development of improvement projects in manufacturing, but after the technical actions defined is necessary to use other methods to economic and financial evaluation in order to verify the cost-benefit from the actions implemented versus the resources needed for its implementation. In this sense this work aims at applying multiple methods of analysis of economic feasibility - among them the techniques of net present value, internal rate of return, payback and cash flow - to assess the implementation of a lean six sigma project in a small business company in the area of São Jose dos Pinhais, PR. [ABSTRACT FROM AUTHOR]

This study analyzes the investment in Penaeus (Litopenaeus) vannamei shrimp production in greenhouses using the biofloc technology system (BFT). Considering bioeconomic variables, a sensitivity analysis was performed with data collected over the course of 10 years to evaluate program efficiency. The parameters considered include a stocking density of 400 shrimp/m2, which reached a productivity rate of 3.84 kg/m2 (69,120 kg/year—three cycles), a final mean weight of 12 g, and a feed conversion rate of 1.3. The results obtained had a net present value (NPV) of US$ 904,947.21, net future value (NFV) of US$ 2,401,094.35, equivalent annual value (EAV) of US$ 148,861.38, payback (PB) of 2 years and 4 months, discounted payback period (DPP) of 2 years and 10 months, profitability index (PI) of 2.59, internal rate of return (IRR) of 41.23%, and a modified internal rate of return (MIRR) of 21.25%. However, shrimp with a final mean weight of 15 g resulted in an NPV of US$ 2,522,150.62, NFV of US$ 6,692,016.44, EAV of US$ 414,886.98, a PB of 1 year and 2 months, DPP of 1 year and 2 months, PI of 5.43, IRR of 89.13%, and an MIRR of 30.57%. The Monte Carlo simulation (MCS) concluded that the probability of NPV being negative is 0. The analysis confirms that P. vannamei production using the BFT system is a financially sustainable activity. [ABSTRACT FROM AUTHOR]

Copyright of Brazilian Business Law Journal / Administração de Empresas em Revista is the property of Administracao de Empresas em Revista and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Revista Competitividade e Sustentabilidade - ComSus is the property of Universidade Estadual do Oeste do Parana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Anaerobic digestion has emerged as the most appealing waste management strategy in biorefineries. Particularly, recent studies have highlighted the energy advantages of waste co-digestion in industrial biorefineries and the use of two-stage systems. However, there are some concerns about moving the system from laboratory testing to industrial scale. One of them is the high level of investment that is required. Therefore, this study carried out a techno-economic analysis (scale-up and energy production, economic and risk analysis, and factorial design) to assess the feasibility of single- and two-stage systems in the treatment of cheese whey and glycerin for the production of hydrogen and methane. Scenarios (S1 to S9) considered thermophilic and mesophilic single and two-stage systems with different applied organic loading rates (OLR A). The analyses of scale-up and energy production revealed that S3 (a thermophilic single-stage system operated at high OLR A 17.3 kg-COD.m−3.d−1) and S9 (a thermophilic-mesophilic two-stage system operated at high OLR A 134.8 kg-COD.m−3.d−1 and 20.5 kg-COD.m−3.d−1, respectively) were more compact and required lower initial investment compared to other scenarios. The risk analysis performed by a Monte Carlo simulation showed low investment risks (10 and 11%) for S3 and S9, respectively, being the electricity sales price, the key determining factor to define whether the project in the baseline scenario will result in profit or loss. Lastly, the factorial design revealed that while the net present value (NPV) is positively impacted by rising inflation and electricity sales price, it is negatively impacted by rising capitalization rate. Such assessments assist in making decisions regarding which system can be fully implemented, the best market circumstances for the investment, and how market changes may favorably or unfavorably affect the NPV and the internal rate of return (IRR). [Display omitted] • Two-stage was 14% more compact and would produce 2% more power than single-stage. • Two-stage system would have a total investment cost 4% higher than single-stage. • Two-stage system would have a 1% higher investment risk than single-stage. • The primary factor affecting the risk is the electricity sales price. • The capitalization rate presents a negative effect on the net present value. [ABSTRACT FROM AUTHOR]

The aim of the study is to present an economic analysis of a micro cogeneration system using financial analysis (energy view) and exergoeconomic analysis (exergy view). This system uses a natural gas-fueled 30 kW microturbine to generate electricity, and to produce hot water by recovering energy from the waste heat in the exhaust gases by using a heat exchanger, which serves as the drive source of an absorption chiller with a nominal capacity of 35 kW. In the financial analysis economic indicators such as payback, net present value and internal rate of return were used to verify the economic feasibility of this system, while in the exergoeconomic analysis, the Theory of Exergetic Cost was used to determine the exergetic monetary costs. A thermodynamic model was developed on the EES-32 (Engineering Equation Solver) platform. On applying the financial analysis, the results showed that the micro cogeneration system is feasible with positive values of R$ 206,540.00 for NPV, 27% IRR and a 6-year payback. Based on the exergoeconomic analysis, the cogeneration system is also feasible since the monetary cost of the electricity is lower than that charged by the electricity company but this is only possible after the 5th year.

ABSTRACT The objective of this study was to develop a simulation model to analyse the technical, economic, and financial performance of using different reproductive strategies in dairy herds. Strategies simulated were: artificial insemination (AI) using conventional semen after oestrus detection (AIC), AI using sex-sorted semen after oestrus detection (AIS), timed artificial insemination (TAI) using conventional semen (TAIC), and TAI using sex-sorted semen (TAIS). The total time horizon analysed corresponded to 25 years, divided into 425 periods of 21 days. The model simulates the biological cycle that takes place within the bovine herd, and uses input information (productive parameters, investments, and reproductive program) to calculate output information (animal inventory variance, incomes, costs, and cash flow analysis). Based on the obtained cash flow, the payback period, net present value, and internal rate of return were calculated. The payback for AIC, AIS, TAIC, and TAIS occurred in 26, 27, 23, and 25 periods. The net present value and the internal rate of return per year of the investment for AIC, AIS, TAIC, and TAIS were US$ 557773 and 59.44%; US$ 520469 and 54.76%; US$ 741800 and 70.22%; and US$ 662891 and 63.52%, respectively. The mean culling rate over 25 years for AIC, AIS, TAIC, and TAIS was 43.30%, 64.89%, 21.12%, and 36.40%, respectively. The simulation clearly demonstrated the economic and technical benefits of using TAI in dairy herds. These benefits are greater when TAI is used with conventional semen, despite the large investment in technology that is required. Using this mathematical model, future studies could be conducted when the assessment of the technical and economic viability of new scenarios is required.

Copyright of Acta Scientiarum: Technology is the property of Universidade Estadual de Maringa and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Making decisions for Information Technology (IT) investments have become a critical decision in businesses today. IT investments are being seen as a strategic investment for many organizations. However, organizations are also concerned about how IT investment can be translated into dollar returns. In response, earlier literatures had attempted to propose evaluation methods and measurements to justify such investments. Unfortunately, none of these proposed solutions were considered appropriate for IT investment, hence to date, there are still no formal evaluation methods on the measurement of such investments. In view of this, this paper attempts to perform a survey across different evaluation solutions to justify IT investment and seek to further understand the different reasons that may prevent the IT industry from defining a standard evaluation method. [ABSTRACT FROM AUTHOR]

This work refers to a case study on sugar cane mill from Sao Paulo State, in Brazil. It will be analysed the financial benefit acquired through sugar cane bagasse usage as energy source, studying the transformation of this inlet into electrical power, highlighting the greenhouse gas emissions throughout the manufacturing processes of sugar and alcohol. Also, a relationship between power generated and gases emitted will be established and a financial analysis of the project cash flow through the analysis of net present value (NPV), internal rate of return (IRR), and payback will be done. The high profitability calculated on Santa Candida Mill was evaluated, which becomes even greater when implementing the cogeneration system. This one may also consider the sale of surplus energy and carbon credits as two more products to sell to the plant. [ABSTRACT FROM AUTHOR]

Due to the importance of family farming especially in bean cultivation in the state of Paraná, Brazil, current assay evaluates the economic viability and risk of bean production on a family farm in Campo Mourão (northwestern region). Economic viability indicators have been assessed, such as net present rate value (NPR), internal rate of return (IRR) and payback period (PP). Further, sensitivity analysis and risk analysis were carried out with Monte Carlo simulation method. Results indicated the project´s economic viability. Moreover, their viability was more sensitive to revenue components than that of costs. These factors did not warrant significant risk to the project's success. [ABSTRACT FROM AUTHOR]

Abstract: Green roofs have been used as an environmentally friendly product for many centuries and considered as a sustainable construction practice. Economic and environmental benefits of green roofs are already proven by many researchers. However, a lifecycle net benefit-cost analysis, with the social dimension, is still missing. Sustainable development requires quantitative estimates of the costs and benefits of current green technologies to encourage their use. This paper is based on an extensive literature review in multiple fields and reasonable assumptions for unavailable data. The Net Present Value (NPV) per unit of area of a green roof was assessed by considering the social-cost benefits that green roofs generate over their lifecycle. Two main types of green roofs – i.e. extensive and intensive – were analyzed. Additionally, an experimental extensive green roof, which replaced roof layers with construction and demolition waste (C&D), was assessed. A probabilistic analysis was performed to estimate the personal and social NPV and payback period of green roofs. Additionally, a sensitivity analysis was also conducted. The analysis demonstrated that green roofs are short-term investments in terms of net returns. In general, installing green roofs is a low risk investment. Furthermore, the probability of profits out of this technology is much higher than the potential financial losses. It is evident that the inclusion of social costs and benefits of green roofs improves their value. [Copyright &y& Elsevier]

When interest rates are uncertain, the net-present-value threshold required to justify an irreversible investment is increasing in the length of a project's payback period. Therefore, slow-payback projects should face a higher hurdle than fast-payback projects, just as investment folklore suggests. This result suggests that the widely disparaged use of payback for capital budgeting purposes can be an intuitive response to correctly perceived costs and benefits. [ABSTRACT FROM AUTHOR]