The renewable energy market in Brazil: Current status and potential

Pereira, Márcio Giannini; Camacho, Cristiane Farias; Freitas, Marcos Aurélio Vasconcelos de; Silva, Neilton Fidélis da

doi:10.1016/j.rser.2012.03.024

Cited by 142 publications

(60 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Brazil, for example, has a huge potential for the production of wind energy, (> 143 GW), solar energy, and a variety of alternatives for hydropower besides large dams (small hydroelectric plants-SHP, river hydrokinetic energy-RHK) [49][50][51][52] . Currently, Brazil would be losing approximately 20% of the energy due to defficien transmission 53. Using a conservative projection, improvements in the transmission and distribution system and repowering and modernizing existing hydropower plants could increase energy delivery of approximately 2.84% 54 .…”

Section: Boxmentioning

confidence: 99%

Damming the rivers of the Amazon basin

Latrubesse

Arima

Dunne

et al. 2017

Nature

638

473

View full text Add to dashboard Cite

SummaryMore than 100 hydropower dams have already been built in the Amazon basin and numerous proposals for further dam constructions are under consideration. The accumulated negative environmental effects of built and proposed dams, if constructed, will trigger massive hydrophysical and biotic disturbances that will impact the Amazon basin's floodplains, estuary, and sediment plume. By introducing a Dam Environmental Vulnerability Index (DEVI) we quantify the current and potential impacts of dams in the basin. The scale of foreseeable environmental degradation indicates the need for collective action among nations and states to avoid cumulative, far-field impacts. We suggest institutional innovations to assess and avoid the likely impoverishment of Amazon rivers.

show abstract

Section: Boxmentioning

confidence: 99%

Damming the rivers of the Amazon basin

Latrubesse

Arima

Dunne

et al. 2017

Nature

638

473

View full text Add to dashboard Cite

show abstract

“…Quando se compara os resultados das figuras 5B e 10B para o ferro Armco, a presença de BTAH altera a resistência a polarização, para valores maiores, fato que pode ser explicado pela formação de um complexo de Fe(BTA) 2 , sobre a superfície metálica, o que proporciona uma aumento na resistência a oxidação [29].…”

Section: Discussionunclassified

Aplicação do aço carbono e ferro Armco na produção de gás hidrogênio em ácido fórmico

et al. 2016

View full text Add to dashboard Cite

RESUMOOs incentivos às políticas energéticas e as atuais exigências ambientais motivam a busca por fontes de energia alternativa, como o gás hidrogênio. Este trabalho tem como objetivo a produção do gás hidrogênio via eletrólise do ácido fórmico, utilizando eletrodos de aço carbono 1008 e ferro Armco. Os ensaios foram feitos mediante planejamento experimental, e empregaram-se as técnicas de microscopia óptica, polarização potenciodinâmica catódica, potencial de circuito aberto e cronoamperometria. Os resultados mostraram que o tratamento da superfície dos eletrodos com lixa de carbeto silício (SiC) #320 é eficiente quando comparada aos outros tratamentos testados, para o desprendimento de H 2 . O ferro Armco, apresentou maior produção de hidrogênio, em média 70% a mais quando comparado com a platina em ambos os meios estudados, entretanto sua vida útil é menor.Palavras-chave: biomassa, catalisador, biocombustível. ABSTRACTIncentives for energy policies and current environmental requirements motivate the search for alternative energy sources such as hydrogen gas. This paper aims at the production of hydrogen gas via electrolysis of formic acid using electrodes of 1008 carbon steel and Armco iron. Samples were done by experimental design, and employed the techniques of optical microscopy, cathodic potentiodynamic polarization, open circuit potential and chronoamperometry. The results showed that the surface treatment of the electrodes with #320 grit SiC abrasive paper is effective when compared to the other treatments tested for the evolution of H 2 . The Armco iron, showed higher hydrogen production, on average 70% increased when compared with platinum in both studied media, however its lifetime is shorter.

show abstract

“…The wind energy started to be an economical alternative for electricity generation in Brazil after 2002, with the deployment of the Brazilian incentive program for renewable energies, named PROINFA, which supported several wind energy projects along the last decade, mainly in the Northeastern region. The wind power plants already endorsed to operate will attain around 5% share on the electricity matrix in a short timeframe (Martins and Pereira, 2011;Pereira et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Observational Study of Wind Shear in Northeastern Brazil

Martins¹,

Gonçalves²,

Pereira³

2016

American Journal of Engineering and Applied Sciences

View full text Add to dashboard Cite

The wind energy share is growing fast in Brazil and a better understanding of wind speed vertical profiles is essential for accurate power density estimates. The wind shear is highly variable in space and time, being influenced by surface layer stability. Studies concerning wind vertical profiles may have a significant contribution to the Brazilian energy sector. However, wind observational data are very scarce and most of them were acquired in automated weather stations. This work investigates the wind vertical profile data acquired at a wind mast in a semi-arid region of Brazilian Northeastern region, correlating it to stability conditions of the surface boundary layer, surface roughness and friction velocity. The results indicated that strong winds (>7 m sec −1 ) overcome the stability effects, allowing a better estimate of roughness length, friction velocity and exponential coefficient. In a second step, the wind speed at 50 m agl. Were estimated from wind measurements at 25 m agl. The wind estimates were compared to observations, showing that exponential and logarithmic approaches were able to simulate wind profile. The exponential approach presented the lowest BIAS for rainy season, but overestimated high wind velocities. Finally, a sensitivity analysis demonstrated how uncertainties on roughness length and exponential coefficient impacts on BIAS deviation and reduce the confidence on wind power density estimates. The results demonstrated the importance in understanding how wind vertical profile is related to atmospheric stability condition in order to get reliable values for the shear parameters from mast observations. It is still more critical if wind database is short-term and when dealing with lower wind speeds.

show abstract

The renewable energy market in Brazil: Current status and potential

Cited by 142 publications

References 5 publications

Damming the rivers of the Amazon basin

Damming the rivers of the Amazon basin

Aplicação do aço carbono e ferro Armco na produção de gás hidrogênio em ácido fórmico

Observational Study of Wind Shear in Northeastern Brazil

Contact Info

Product

Resources

About