Electric vehicles are becoming more popular in the automobile sector since questions about the environment and quality of life have become increasingly important. New ways of commercializing energy should be regulated, like the sale prices applied to service stations for electric vehicles. This study adopted a model for calculating tariffs at a charging station using the optimized tariff methodology-Tarot, a new application for this method. The charging station proposed uses an alternative energy generation system comprised of photovoltaic panels and wind turbines. We evaluated four regions in Brazil with different solar and wind potentials. This is done to see how the tariff can be impacted by the use of natural resources. As a result, we indicate that the application of the Tarot methodology adapted to the concept of charging electric vehicles from the use of renewable sources becomes an opportunity for the sector to apply a tariff adjusted to national regulatory guidelines and to provide a better cost/benefit for the consumer. Of the four regions analyzed, Region 2 proved to be the best region for the implementation of this type of enterprise with the use of a wind and solar distributed generator. The difference in billing value with the average tariff applied with the aid of the distributed system and purely energy network reaches 6% in Region 2. If the photovoltaic generation is added in 30% in this location, it can cause a reduction of up to 7% in the tariff for the sale of energy to vehicles.
As turbinas axiais convencionais são turbinas que operam em condições de baixa-queda, ou seja, alturas de queda entre 70 e até 5 metros. São máquinas que operam com baixas alturas de queda e altas vazões. Para alturas de queda abaixo de 5,0 metros, ainda estão sendo desenvolvidas máquinas para operação dentro desse parâmetro. Máquinas desse porte geram viabilidade econômica e devido à facilidade de sua manutenção e o não emprego de grandes obras civis, podendo ser instaladas em pequenos canais em propriedades rurais e comunidades. Um termo de cooperação científica entre Canadá e Brasil favoreceu para que um modelo de turbina desenvolvido por uma instituição canadense e fosse ensaiada nas dependências da Universidade Federal de Itajubá fosse realizado.Palavras-chave: turbina axial, ultra-baixa queda, ensaio de eficiência mecânica.
From studies of a reversible flow turbine for using in tidal power plants it was obtained a model with symmetrical blades that shows this characteristic. For the obtaining of more accurate results of this type of turbine it was proposed the manufacturing of a physical sample to be used in a testing bench at the Hydromechanical Laboratory of Small Hydropower Plants LHPCH, at Centro Nacional de Referências de PCH, (National Centre of Reference in SHP) CERPCH, in Universidade Federal de Itajubá (Federal University ofItajubá) UNIFEI, and also a mathematic sample modeled on CFD/CFX platform with the ANSYS software. This paper aims to describe one of the tests of the proposed rotor on mathematic model, to be used tidal power plants turbines.
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