scholarly journals VIABILIDADE ECONÔMICA DA ENERGIA FOTOVOLTAICA PARA IRRIGANTES NO NORTE DE MINAS E VALE DO JEQUITINHONHA

2021 ◽  
Vol 36 (1) ◽  
pp. 58-71
Author(s):  
Marcelo Rossi Vicente ◽  
Tarlei Aparecido Santos ◽  
Thalles Loiola Dias ◽  
Patrícia De Oliveira e Lucas ◽  
Ronaldo Medeiros dos Santos ◽  
...  

VIABILIDADE ECONÔMICA DA ENERGIA FOTOVOLTAICA PARA IRRIGANTES NO NORTE DE MINAS E VALE DO JEQUITINHONHA   MARCELO ROSSI VICENTE1, TARLEI APARECIDO SANTOS2, THALLES LOIOLA DIAS1, PATRÍCIA DE OLIVEIRA E LUCAS1, RONALDO MEDEIROS DOS SANTOS1, CAIO VINICIUS LEITE3   1 Instituto Federal de Ensino, Ciência e Tecnologia do Norte de Minas Gerais – campus Salinas (IFNMG – campus Salinas), Fazenda Varginha, Rod. Salinas/Taiobeiras, Km 02, 39560-000, Salinas, Minas Gerais, Brasil. [email protected], [email protected], [email protected], [email protected]. 2 Departamento de Engenharia Cartográfica, Universidade Federal De Pernambuco (UFPE), Av. da Arquitetura, s/n, Cidade Universitária, 50740-550, Recife, Pernambuco, Brasil. [email protected]. 3 Instituto Federal de Ensino, Ciência e Tecnologia de Brasília – campus Planaltina (IFB - campus Planaltina), Rodovia DF – 128, km 21, Zona Rural, 73380-900, Planaltina, Distrito Federal, Brasil. [email protected]   RESUMO: Embora careçam de estudos de viabilidade, soluções baseadas em energia fotovoltaica têm se tornado muito atrativas para irrigantes, principalmente devido às constantes elevações nos custos de eletricidade. Com isso, objetivou-se realizar um estudo sobre a viabilidade econômica do uso da energia fotovoltaica para irrigação nas regiões do Vale do Jequitinhonha e Norte de Minas Gerais. Para a realização do trabalho utilizou-se a base de dados disponibilizada pelo Atlas Brasileira de Energia Solar e como índice de viabilidade econômica da energia fotovoltaica, o custo nivelado de energia (LCOE). Os valores de LCOE foram comparados com valores ponderados da tarifa de energia elétrica, em R$ kWh do Grupo Tarifário B2 Rural em diferentes cenários com jornadas de trabalho (noturna e diurna). Observou-se que quanto maior a radiação solar disponível e quanto maior a potência do sistema fotovoltaico, maior a tendência de viabilidade do investimento, em virtude da redução do LCOE. O uso de energia fotovoltaica é viável, com exceção das menores potências no Vale do Jequitinhonha e microrregiões limítrofes com o Norte de Minas, quando comparada ao uso exclusivo diurno da irrigação. O uso majoritário da tarifa com desconto noturno é uma alternativa à energia fotovoltaica quando se trata de viabilidade econômica.   Palavras - chave: irradiação solar, custo nivelado de energia, tarifa de energia elétrica.   ECONOMIC FEASIBILITY OF PHOTOVOLTAIC ENERGY FOR FARMERS IN NORTHERN MINAS GERAIS STATE AND JEQUITINHONHA VALLEY   ABSTRACT: Although there is a lack of feasibility studies, solutions based on photovoltaic energy have become attractive for farmers due to the constant increases in electricity costs. Thus, this paper aimed to evaluate economic viability of photovoltaic energy for irrigation in the regions of Jequitinhonha Valley and the Northern Minas Gerais State. The database uses in this study came form the Brazilian Atlas of Solar Energy was used. The levelized cost of energy (LCOE) was used as an economic viability index for photovoltaic energy.  The LCOE values were compared with the energy tariff weighted values, in R$ kWh, of the B2 Rural Tariff Group in different nights and day-working hours scenarios. It was observed that the greater the generation potential and the power of the photovoltaic system, the greater the trend of investment viability due to the LCOE reduction. The use of photovoltaic energy is feasible, except to lower powers in the Jequitinhonha Valley and Northern Minas Gerais State neighboring microregions, when compared to daytime irrigation. The mainly use of the nightly discounted energy tariff is an alternative to photovoltaic energy when it comes to economic viability.   Keywords: Solar radiation, LCOE, Energy tariff

2020 ◽  
Vol 194 ◽  
pp. 02024
Author(s):  
Krittaphas Mongkoldhumrongkul

Solar energy is an ordinary type of renewable energy accustomed to produce electricity. However, the photovoltaic system may confront risks and uncertainties for operation. King Mongkut’s University of Technology North Bangkok, Rayong campus (KMUTNB), situated in an area which is suitable for photovoltaic installation, plans to expand their alternative energy proportion. This research focuses on the design and economic feasibility of the photovoltaic rooftop system on the female dormitory. By using the System Advisor Model (SAM) program simulation, the total capacity of the panels is found to be about 198.23 kWp with a total electricity production of about 281.827 MWh per year. The economic results revealed that the photovoltaic rooftop system has the potential to produce electricity at a competitive price. The cost of energy is obtained for 0.1297 USD per kWh throughout the project’s life, meaning that the project would serve as a means of reducing 3,535.7327 tons of carbon dioxide equivalent.


2020 ◽  
Vol 12 (22) ◽  
pp. 9556
Author(s):  
Bateer Baiyin ◽  
Kotaro Tagawa ◽  
Joaquin Gutierrez

An open-field cultivation combined-type aquaponic system (OCAS) was developed to effectively utilize saline groundwater and prevent soil salinization while ensuring food production in drylands. To achieve the sustainable food production of the OCAS in power-scarce areas, a stand-alone photovoltaic system (PVS) for the OCAS was designed through a feasibility study of utilizing solar energy to meet its power demand. As a case study, the OCAS was established in La Paz, Baja California Sur, Mexico, with power consumption 22.72 kWh/day and annual average daily global horizontal irradiation (GHI) 6.12 kWh/m2/day, considering the 2017 meteorological data. HOMER software was employed for performance analysis and techno-economic evaluation of an appropriate PVS. Thousands PVS configurations were evaluated in terms of total net present cost (NPC) and levelized cost of energy (COE). The PVS that fulfilled the power demand and had the smallest NPC was proposed, for which the NPC and COE were calculated as $46,993 and $0.438/kWh, respectively. The relationship between its annual power supply and power demand of the OCAS was also analyzed in detail. It was found that the operation hours and the amount of power generation by the proposed PVS were 4156 h and 19,106 kWh in one year. Additionally, it was predicted that the excess power would occur almost every afternoon and reach 43% of the generated power. Therefore, the COE can be further reduced by rationally utilizing the excess power during operation.


2020 ◽  
Vol 44 ◽  
Author(s):  
Gabriel Browne de Deus Ribeiro ◽  
Angélica de Cássia Oliveira Carneiro ◽  
Artur Queiroz Lana ◽  
Sebastião Renato Valverde

ABSTRACT This work analyzed the economic viability of four charcoal productive systems from Minas Gerais state, namely: fornos-fornalha, rabo-quente, encosta and superfície. The evaluated systems have an estimated productive capacity of about 100 cubic meters of charcoal per month. Implementation and maintenance expenses and productive parameters were obtained in the literature and from local producers of Lamim (MG), a productive center in the state, during the year of 2018. Silvicultural costs were not considered, only the wood purchase. For the economic evaluation, Net Present Value (NPV), Modified Internal Rate of Return (MIRR), Payback, capex and opex were analyzed, and it was also evaluated the systems’ economic sensitivity to charcoal price and gravimetric yield variations. The main results showed that all the systems were economically viable by NPV criteria; only rabo-quente system was not viable by MIRR criteria; fornos-fornalha system presented the best economic results, greater capacity of net revenues and free cash flow generation, and lower operational expenses. This productive system was also less sensitive to charcoal price fluctuations and to its charcoal yield reduction. Given this fact, its insertion may be attractive in the productive reality of small and medium producers. In addition, the possibility of selling charcoal fines resulted in improvements in economic indicators, especially for traditional production systems: rabo-quente and encosta.


Clean Energy ◽  
2022 ◽  
Vol 6 (1) ◽  
pp. 891-904
Author(s):  
Sina Semeskandeh ◽  
Mehrdad Hojjat ◽  
Mohamad Hosseini Abardeh

Abstract Inverters play a significant role in the configuration of grid-connected photovoltaic (PV) systems. The perturb-and-observe (P&O) algorithm is a common method to derive the maximum power from grid-connected inverters; however, the possibility of losing maximum power due to sudden changes in radiation is a significant drawback of this control strategy. To overcome this barrier, the two-stage multi-string inverter using the ZETA DC–DC converter and a novel P&O algorithm has been proposed to increase the efficiency of these systems. The proposed inverter has been simulated in MATLAB/SIMULINK software. To investigate the performance of the proposed inverter, technical, environmental and economic feasibility studies have been performed for the construction of a 5-kW PV power plant in a northern city of Iran (Sari) using the RETScreen software developed by Natural Resources Canada. On the other hand, most feasibility studies for power-plant construction are based on the concept of inverter peak efficiency, which leads to non-optimal system design due to the short operation duration of the inverter at this value. However, the weighted European efficiency has been used in the feasibility study for more accurate computations. Moreover, the performance of the proposed inverter is compared to that of a two-stage multi-string inverter using a conventional P&O algorithm and the single-stage (central) inverter. The simulation results indicated that the proposed inverter injects 7.6 MW of power into the grid per year. Moreover, it prevents the emission of 88 tons of CO2 (over 20 years), which is equivalent to saving 1883.5 litres of gasoline per year.


2020 ◽  
Vol 6 ◽  
Author(s):  
Caíque de Oliveira Fernandes Concolato ◽  
Mauro Rezende Cunha ◽  
Herlander Costa Alegre da Gama Afonso

Purpose: This paper presents a systematic literature review regarding economic feasibility studies and photovoltaic solar energy production. Methodology/Approach: To this end, publications from 2015 to 2019 were collected in two journal databases: Web of Science and Science Direct. In order to create a corpus more relevant to the aim of this research, a selection among the papers found was made respecting some established filters. Subsequently this refinement, the resulting corpus consisted of seventeen papers. Findings: A current matter discussed by the researchers was identified, regarding the study on the best photovoltaic system to be used for each user: whether batteries are the best option as a storage source, or the connection of the system to the network is the most adequate guarantee to meet demand. Research Limitation/implication: This review gives the present study a characteristic of bringing together what, within the mentioned period and in the searched bases, has been approached in different works that deal with the economic feasibility analysis regarding the photovoltaic solar energy production. Originality/Value of paper: can support the implementation of solar systems in peripheral locations where the technology is still little used.


Author(s):  
Esdras Ramos da Silva ◽  
Livia Da Silva Oliveira ◽  
David Barbosa de Alencar ◽  
Antônio Estanislau Sanches ◽  
Igor Felipe Oliveira Bezerra

This study aims to demonstrate the application of sizing and an analysis regarding the economic viability of a grid connected Photovoltaic System for a trade located in a commercial area of ​​Manaus - AM, considering the agents that influence the initial investment analysis. and end of project. Exposing the relevant concepts around grid-connected photovoltaic systems (SFCR) establishing regulatory standards governing insertion for distributed generation micro and mini connection systems and methods for project investment analysis. Presenting the analysis effect of the economic viability of the system using the discounted payback investment methods, the energy consumption, in kWh, in the trade and investment profit and, finally, the results and conclusions obtained through the method of Discounted Payback analysis, which shows the viability of the project from a technical and economic point of view, in order to meet and contribute to sustainability and conservation of the environment.


Author(s):  
Ricardo Dalagnol ◽  
Carolina B. Gramcianinov ◽  
Natália Machado Crespo ◽  
Rafael Luiz ◽  
Julio Barboza Chiquetto ◽  
...  

2021 ◽  
Vol 108 ◽  
pp. 103349
Author(s):  
David Oldack Barcelos Ferreira Machado ◽  
Karina Ferreira Chueng ◽  
Heloisa Helena Gomes Coe ◽  
Alexandre Christófaro Silva ◽  
Camila Rodrigues Costa

2013 ◽  
Vol 71 (9) ◽  
pp. 4177-4186 ◽  
Author(s):  
Aline Sueli de Lima Rodrigues ◽  
Guilherme Malafaia ◽  
Adivane Terezinha Costa ◽  
Hermínio Arias Nalini Júnior

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