Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
ECONOMIC AND RISK ANALYSIS FOR IMPLEMENTATION OF A SAVONIUS WIND TURBINE FOR AERATION PROCESS IN FISH FARMING
Submission Author:
Pericles Nicolau Balafa , RS , Brazil
Co-Authors:
Pericles Nicolau Balafa, Adriane Prisco Petry, Simone Venturini, Taís Alfonso, Flavio Vanderlei Zancanaro Júnior, Charles Rech, Carlos Eduardo de Souza, Cristiano Maidana, João Vicente Akwa
Presenter: Pericles Nicolau Balafa
doi://10.26678/ABCM.COBEM2021.COB2021-1078
Abstract
In Brazil, consumers can generate their own electricity from renewable sources, also known as Distributed Generation (DG). Besides contributing to the diversification of the energy matrix, distributed generation brings benefits to the economy as well as self-sustainability. The use of unconventional wind devices such as the Savonius turbine can be a low-cost solution, reducing environmental impacts for decentralization of energy production. The Brazilian aquaculture sector is growing quickly and, therefore, presents great potential for improving existing technologies aiming at sustainability. This paper analyzes the risks of the aeration process powered by a Savonius wind turbine, an alternative mechanical energy source, as a substitute to electrical energy normally used for this purpose in a fish farm. The conceptual and mechanical design of the Wind Aerator - as this system for the aeration of ponds in fish farming, powered by a Savonius wind turbine, has been called - is complete. The economic feasibility analysis of the implantation considers a capital recovery time metrics (Payback), Net Present Value (NPV) and Internal Rate of Return (IRR). The risks are analyzed under two aspects: qualitative analysis method and quantitative analysis method, considering the internal rate of return, discounting the effects of inflation (Net IRR) and the payback by months. The best-and worst-case scenarios are compared to the base case. The connection between the wind turbine and the air compressor is made through a spiral bevel gear and the study is carried out using the theoretical reference values of the torque supplied on the turbine shaft to calculate the air compressor flow. The aeration process for the oxygenation of ponds in aquaculture, since it' s powered by a Savonius wind turbine, contributes as an alternative, renewable, and clean energy source without the use of electricity.
Keywords
savonius wind turbine, aeration in fish farming, dissolved oxygen, renewable energy, economic and sensitivity analysis
