scholarly journals Taper modeling and economic evaluation of multi-products obtained from wood of short-rotation eucalyptus stands

FLORESTA ◽  
2020 ◽  
Vol 50 (3) ◽  
pp. 1439
Author(s):  
Luciana Da Silva Menezes ◽  
Joice Beatriz Lopes Figueredo ◽  
Lidiomar Soares Costa ◽  
Renato Vinícius Oliveira Castro ◽  
Carlos Alberto Araújo Júnior
Keyword(s):  
Interest Rates ◽  
Net Present Value ◽  
Eucalyptus Grandis ◽  
Economic Viability ◽  
Eucalyptus Urophylla ◽  
Present Value ◽  
Viable Option ◽  
Viability Analysis ◽  
Short Rotation ◽  
Stem Tapering

This study aims at defining the appropriate model to describe the stem tapering of trees of Eucalyptus urophylla x Eucalyptus grandis hybrid, and at evaluating the economic viability of obtaining wood multi-products at different interest rates. The volume of 60 sample trees were determined, and stem tapering was described according to the models proposed by Demaerschalk, Prodan, Kozak, and Ormerod. The best model was used to convert the trees into assortments so that the wood could be optimized for the product that offers the maximum economic return with the minimum possible waste. Then, an economic viability analysis was performed for wood multi-product production, using the Net Present Value (NPV) and applying interest rates of 8 to 12% p.a. The Demaerschalk model is the most appropriate one for the study of stem tapering and assortment determination in short-rotation stands of the Eucalyptus urophylla x Eucalyptus grandis hybrid intended for multi-products in the region covered by the study. The allocation of wood for multi-products is a viable option for stands of the Eucalyptus urophylla x Eucalyptus grandis hybrid, according to the interest rates applied in the present study.

scholarly journals Economic Viability and Socio-Environmental Impacts of Solar Home Systems for Off-Grid Rural Electrification in Bangladesh

Energies ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 679 ◽  
Author(s):  
Swati Anindita Sarker ◽  
Shouyang Wang ◽  
K M Mehedi Adnan ◽  
Muhammad Khalid Anser ◽  
Zeraibi Ayoub ◽  
...  
Keyword(s):  
Environmental Impacts ◽  
Low Income ◽  
Net Present Value ◽  
Economic Benefits ◽  
High Rate ◽  
Economic Viability ◽  
Internal Rate Of Return ◽  
Present Value ◽  
Viable Option ◽  
Home Systems

This study conducted a questionnaire-led survey to explore the financial feasibility and socio-environmental impacts of stand-alone solar home systems (SHS) through stratified random sampling. Based on the above consideration, fifteen cases of studies of various watt peak (Wp) capacities have been investigated to evaluate the economic viability of solar home systems. The results revealed that most of the cases have positive net present value (NPV) and low payback periods, with an internal rate of return (IRR) value ranging from 16% to 131%, which signifies a high rate of investment exchange. Solar home systems are economically profitable for micro-enterprises and households with low-income generation activities as opposed to the households using it only for lighting. The study found that solar home systems with a capacity above 30 Wp are the most economically viable option, which can also avoid 6.15 to 7.34 tonnes of CO2 emissions during the 20 years of life-cycle, while providing different applications including lighting, recreation, information, health, and economic benefits.

scholarly journals Economic analysis of an agrosilvipastoral system for a mountainous area in Zona da Mata Mineira, Brazil

2011 ◽  
Vol 46 (10) ◽  
pp. 1148-1153 ◽  
Author(s):  
Marcelo Dias Müller ◽  
Gilciano Saraiva Nogueira ◽  
Carlos Renato Tavares de Castro ◽  
Domingos Sávio Campos Paciullo ◽  
Frederico de Freitas Alves ◽  
...  
Keyword(s):  
Net Present Value ◽  
Evaluation Criteria ◽  
Eucalyptus Grandis ◽  
Acacia Mangium ◽  
Forest Products ◽  
Production Costs ◽  
Economic Viability ◽  
Agricultural Activity ◽  
Mountainous Area ◽  
Viability Analysis

The objective of this work was to evaluate the economic viability of an agrosilvipastoral system developed for Zona da Mata mountainous areas in Minas Gerais state, Brazil, as well as to compare different options for wood (Eucalyptus grandis and Acacia mangium) commercialization of the second thinning. The data were obtained from a 10 year-old agrosilvipastoral system established in four hectares at Embrapa Gado de Leite station in Coronel Pacheco, MG, Brazil. As evaluation criteria for the economic viability analysis, the adopted methods were the net present value (NPV) and the internal rate of return (IRR), both calculated at 6% interest rate. Despite the small difference, adding value to forest products increased the attractiveness of the proposed system. Considered separately, the agricultural activity was impracticable, whereas the forestry and livestock activities were independently viable. The studied system seems to be equally tolerant to price variations for forest and livestock products, as well as strongly tolerant to variations in production costs.

scholarly journals Análise de Viabilidade Econômica na Implantação de Termoelétrica a Base de Casca de Arroz em Cachoeira Do Sul - RS

2021 ◽  
Author(s):  
LUCAS ALVAREZ NOGUEIRA ◽  
MAICON JADERSON SILVEIRA RAMOS ◽  
LAURA LISIANE CALLAI DOS SANTOS
Keyword(s):  
Rice Husk ◽  
Net Present Value ◽  
Industrial Process ◽  
Rice Production ◽  
Economic Viability ◽  
Internal Rate Of Return ◽  
Viability Analysis ◽  
Thermoelectric Plant ◽  
The City ◽  
Proper Disposal

The industrial process and production of rice requires a correct management of the residues generated by them, for the best use of them, proper disposal, and reduction of environmental impacts. In this context, when perceiving the potential of rice production in the city of Cachoeira do Sul - RS, the present project proposes the economic viability analysis in the implantation of a thermoelectric power plant with the generation of energy from the rice husk biomass in the municipality of Cachoeira do Sul. For the present work, a survey of rice production in the main mills of the city was prepared and the amount of rice husk that could be used as fuel in the biomass-based thermoelectric plant was defined. The costs necessary for the implementation of the thermoelectric plant and the revenues from the sale of the produced energy were evaluated, making it possible to obtain economic viability analysis of the project. The values found in the minimum attractiveness rate, net present value, internal rate of return and payback calculations show that the use of rice husk for power generation in a thermoelectric plant is viable for Cachoeira do Sul-RS.

scholarly journals VIABILIDADE ECONÔMICA DA PRODUÇÃO DE CARVÃO VEGETAL EM DOIS SISTEMAS PRODUTIVOS

FLORESTA ◽  
2014 ◽  
Vol 44 (1) ◽  
pp. 143 ◽  
Author(s):  
Aylson Costa Oliveira ◽  
Thiago Taglialegna Salles ◽  
Bárbara Luísa Corradi Pereira ◽  
Angélica De Cássia Oliveira Carneiro ◽  
Camila Soares Braga ◽  
...  
Keyword(s):  
Economic Analysis ◽  
Net Present Value ◽  
Production Systems ◽  
Planning Horizon ◽  
Economic Viability ◽  
Present Value ◽  
Charcoal Production ◽  
Average Annual Production ◽  
The Cost ◽  
Benefit Cost

O objetivo deste trabalho foi analisar a viabilidade econômica da produção de carvão vegetal em dois sistemas produtivos: oito fornos de superfície acoplados a uma fornalha para queima de gases e dez fornos do tipo “rabo-quente” sem sistema de queima de gases. Para análise econômica, definiu-se uma produção anual média igual a 1.571 metros cúbicos de carvão (mdc) e horizonte de planejamento de 12 anos, sendo propostos 2 cenários. No primeiro cenário, após a colheita da madeira, realiza-se o plantio de uma nova floresta, permanecendo o custo da madeira constante em todo o planejamento; no segundo cenário, após a colheita, considerou-se a condução da brotação, reduzindo os custos na 2ª rotação e consequentemente os custos da madeira. A análise econômica foi realizada através da determinação dos seguintes indicadores: Valor Presente Líquido (VPL), Valor Anual Equivalente (VAE), Razão Benefício/Custo (B/C) e Lucratividade. Os indicadores calculados demonstraram a viabilidade dos dois sistemas produtivos avaliados em ambos os cenários propostos, porém o sistema fornos-fornalha apresentou melhores valores para os indicadores. Conclui-se que a produção de carvão vegetal nos sistemas avaliados foram viáveis economicamente, com o sistema fornos-fornalha gerando maior lucro ao produtor de carvão.Palavras-chave: Fornos de alvenaria; análise determinística; valor presente líquido. Abstract Economic viability of charcoal production in two production systems. The objective of this study was to analyze the economic viability of charcoal production in two conversion technologies: eight surface kilns coupled to a furnace for burning gases (kilns-furnace system) and ten "rabo-quente" or traditional charcoal kilns without burning gases system. An average annual production of 1571 cubic meters of charcoal (mdc) was used to perform the economic analysis. A planning horizon of 12 years and two scenarios were proposed. In the first scenario, after harvesting the wood, the planting of a new forest was performed, and the cost of wood remained constant throughout the planning horizon. In the second scenario, after the harvest, the conduction of shooting was considered, which reduced costs in the second rotation and consequently the cost of wood. The economic analysis was performed by determining the following indicators: Net Present Value (NPV), Equivalent Annual Value (EAV) and Benefit - Cost Reason (B/C). Calculated indicators demonstrated the viability of producing charcoal in the two production systems in both scenarios proposed, but kilns-furnace system presented better values. As conclusion, production of charcoal in the evaluated systems were economically viable. Kilns-furnace system was able to generate more profit to charcoal producer.Keywords: Kilns; deterministic analysis; net present value.

A dynamic programming algorithm for optimization of uneven-aged forest stands

1994 ◽  
Vol 24 (9) ◽  
pp. 1758-1765 ◽  
Author(s):  
David J. Anderson ◽  
B. Bruce Bare
Keyword(s):  
Dynamic Programming ◽  
Interest Rates ◽  
Net Present Value ◽  
Initial Conditions ◽  
Dynamic Programming Algorithm ◽  
Basal Area ◽  
Management Problem ◽  
Present Value ◽  
Stand Management ◽  
The Impact

A deterministic dynamic programming formulation of the transition uneven-aged stand management problem is presented. Using a previously published northern hardwoods growth model, a forward recursive, discrete, two-state problem that maximizes the net present value of harvested trees at each stage is developed. State variables represent the total number of trees and the total basal area per acre. A neighborhood storage concept previously published is used to reduce the number of states considered at each stage. Two harvest allocation rules are used to assign the harvested basal area to individual diameter classes. Terminal end point conditions and stage to stage sustainability are not required. Results from four base runs of the model are presented and compared with previously published results. Each run produces significantly different optimal paths, with one showing a higher net present value than any previously published. Sensitivity runs illustrate the impact of changes in interest rates, width of neighborhood storage class, and initial conditions. Dynamic programming offers promise for analyzing uneven-aged stand management problems.

scholarly journals An evaluation of the economic viability of environmental offsets in the saltworks industry

2020 ◽  
Vol 50 (5) ◽  
Author(s):  
Rogério Taygra Vasconcelos Fernandes ◽  
Aruza Rayana Morais Pinto ◽  
Raimunda Thyciana Vasconcelos Fernandes ◽  
Jônnata Fernandes de Oliveira ◽  
José Luís Costa Novaes
Keyword(s):  
Economic Impact ◽  
Net Present Value ◽  
Economic Viability ◽  
Attractive Alternative ◽  
Present Value ◽  
Conservation Units ◽  
Productive Area ◽  
Solar Saltworks ◽  
Do So

ABSTRACT: The extraction of sea salt depends on the occupation of large areas at the estuary banks, many of them inserted in Permanent Preservation Areas (PPAs). Thus, the objective was to evaluate the economic viability of Environmental Offsets (EO) as an alternative to the unoccupied PPAs in the saltworks. In order to do so, 27 solar saltworks installed in the region of the Brazilian White Coast were evaluated for the occupation of PPAs - measured using images from satellite, georeferenced, vectored with corresponding PPA bands generated - and estimated to EO (Impact Degree x Sum of the investments necessary to implement the project) and Economic Impact (Net Present Value, with long-term interest rate of 7%) of vacating PPAs. It was considered that EO was feasible whenever the costs resulting from it were lower than the economic impact caused by the vacancy of the PPAs. The PPAs were tthe productive area of the saltworksthat occupied 13.70% of PPAs. For all the evaluated enterprises the value corresponding to EO was lower than the Economic Impact resulting from the vacancy of the PPAs. Thus, EO is an economically viable and more attractive alternative to the eviction of PPAs by the saltworks industry and may also provide environmental gains due to the financing of conservation units in the areas of influence of the enterprises. However, there is a need to improve the methodology used to estimate the EO, since a maximum limit is set, the environmental impacts caused by the projects are underestimated.

scholarly journals Wave Energy Converter Performance Modeling and Cost of Electricity Assessment

2010 ◽  
Author(s):  
Dmitri Jarocki ◽  
James H. Wilson
Keyword(s):  
Energy Flux ◽  
Wave Energy ◽  
Power Plants ◽  
Net Present Value ◽  
Rate Of Return ◽  
Economic Viability ◽  
Internal Rate Of Return ◽  
Present Value ◽  
Cost Of Electricity ◽  
Wave Energy Flux

California is experiencing a rapid increase in interest for the potential of converting ocean waves in into carbon-free electricity. Numerous applications have been submitted for the permitting of such renewable energy projects; however the profitability, practicability, and survivability have yet to be proven. Wave energy conversion technology has steadily matured since its naissance in the 1970’s, several wave energy power installations currently exist, and numerous plans for commercial power plants are in the works on the shores of multiple continents. This study aims to assess the economic viability of two proposed commercial wave energy power plant projects on the Central California Coast. A hypothetical 25 MW capacity wave energy plant located at a site located 5 nautical miles off of Point Arguello, in Santa Barbara County is compared to a similar site 5 nautical miles off of Morro Bay, in the County of San Luis Obispo. The Pacific Gas and Electric Company and Green Wave Energy Solutions, LLC have proposed full-scale commercial wave power plants at these sites, and are currently undergoing the federal permitting processes. Historical wave resource statistics from 1980 to 2001 are analyzed with performance specifications for the AquaBuOY, Pelamis P1, and WaveDragon wave energy converters (WECs) to calculate the annual electrical output of each device at each site. Sophisticated computer modeling of the bathymetric influence on the wave resource at each site is presented using the program Simulating Waves Nearshore (SWAN) developed by the Delft University of Technology. The wave energy flux, significant wave height, and peak period are computed at each site for typical summer and winter swell cases, using seafloor depth measurements at a 90 meter grid resolution. The economic viability of commercial electricity generation is evaluated for each WEC at each site by the calculation of the net present value of an estimated 25-year project life-cycle, the internal rate of return, and the required cost of electricity for a 10-year project payback period. The lowest required price of electricity is $0.13/kWh and occurs at the Point Arguello site using the AquaBuOY WEC. The highest annual capacity factor is 18% using the Pelamis WEC. The net present value and internal rate of return calculations suggest that the AquaBuOY WEC is profitable at both sites for electricity prices above $0.14/kWh. Shallow water wave propagation SWAN modeling demonstrated favorable wave energy flux states for WEC operation and power generation.

scholarly journals The Financial Valuation Risk in Pepper Production: The Use of Decoupled Net Present Value

Mathematics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 13
Author(s):  
Josefa López-Marín ◽  
Amparo Gálvez ◽  
Francisco M. del Amor ◽  
Jose M. Brotons
Keyword(s):  
Interest Rates ◽  
Risk Evaluation ◽  
Net Present Value ◽  
Cash Flows ◽  
Present Value ◽  
Financial Valuation ◽  
Production Activity ◽  
Quality Water ◽  
Future Cash Flows ◽  
Over Time

Greenhouse peppers are one of the most important crops globally. However, as in any production activity, especially agricultural, they are subject to important risk factors such as price fluctuations, pests, or the use of bad quality water. This article aims to evaluate the viability of these types of crops by using discounted cash flows. Risk evaluation has been carried out through the analysis of pepper plantations for 2016 and 2017. The traditional application of this tool has significant limitations, such as the discount rate to be used or the estimation of future cash flows. However, by using discount functions that decrease over time in combination with decoupled net present value, these limitations are expected to improve. The use of decoupled net present value has permitted an increase in the accuracy and quantification of risks, isolating the main risks such as price drops (EUR 3720 ha−1 year−1) and structural risks (EUR 1622 € ha−1 year−1). The use of decreasing discount functions has permitted a more realistic investment estimation. Finally, the sensitivity analysis shows that decoupled net present value (DNPV) is little affected by changes in interest rates in contrast to traditional net present value (NPV).

scholarly journals ANALISIS KELAYAKAN MESIN PENGERING KERIPIK KENTANG

AGROINTEK ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 10 ◽  
Author(s):  
M. Adhi Prasnowo ◽  
Shafiq Nurdin ◽  
Ahlan Ahlan
Keyword(s):  
Net Present Value ◽  
Electric Energy ◽  
Potato Chips ◽  
Economic Viability ◽  
Internal Rate Of Return ◽  
Present Value ◽  
Tourist Destination ◽  
Tourist Destinations ◽  
Financial Feasibility ◽  
Very High

Batu City is a tourist destination for domestic and foreign tourists because it have variety of tourist destinations that have been managed properly. The development of tourist destinations that increases rapidly, making the businessmen souvenirs typical of Batu City growing. It is also felt by potato chips entrepreneurs, who are experiencing increased demand. But entrepreneurs increasingly difficult to increase the amount of productivity, because the technology used to produce potato chips is still simple. So that can not meet the needs of a very high market. This study aims to determine the economic viability of potato chips dryer. The method used in this research is Net Present Value (NPV) and Internal Rate of Return (IRR). Based on the financial feasibility analysis of potato chips dryer machine using electric energy is feasible to be implemented because the value of NPV is greater than zero which is IDR. 5.233.433 and IRR value 22% greater than the current interest rate of 12% with the project period of 5 years.

scholarly journals ECONOMIC FEASIBILITY STUDY FOR THE INSTALLATION OF A COGENERATION SYSTEM IN A TIMBER INDUSTRY OF LAGES-SC

2019 ◽  
Vol 7 (4) ◽  
pp. 59-71
Author(s):  
Scharles Roberto Vargas ◽  
Graciela Alessandra Dela Rocca ◽  
Nathielle Waldrigues Branco ◽  
José Adelir Wolf ◽  
Fernanda Cristina Silva Ferreira
Keyword(s):  
Net Present Value ◽  
Economic Feasibility ◽  
Economic Viability ◽  
Internal Rate Of Return ◽  
Present Value ◽  
Plateau Region ◽  
Viability Study ◽  
Cogeneration System ◽  
Descriptive Method

This research thematic is the Economic Viability Study, in order to implement a cogeneration system, in a logging company, located in the Santa Catarina highland plateau region. Thus, reducing its production cost, since much of it is due electricity purchase. Data collection of both production, consumption and expenses with electricity purchase and billing were carried out together with the company. Descriptive method was used, with case study. For the economic analysis, both net present value (NPV), internal rate of return (IRR) and payback period were used. With this information and crossing the data, the economic viability for this project became evident, as it can be visualized throughout of this article.

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