2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

Economic viability for installation of generation systems distributed in isolated communities of the conventional electric net

J. Bione, P.B. Carvalho, R.B. Fellows
Companhia Hidroelétrica do São Francisco - CHESF, BR

solar energy, conventional electric net

The increasing consumption and the environmental and social impact caused by traditional sources of energy, have led the government and society in Brazil and in the world impact caused by traditional sources of energy, have led the government and society in Brazil and in the world to think of new alternatives for generating energy, with the aim of substituting petroleum, whose exploitation is destined to finish in the relatively near future, by considering more economically viable costs, and besides this the discussions regarding the reduction of gas emissions that provoke the greenhouse effect were intensified in the last decade of the past century. In this context, the search for alternative sources to attend the electric energy market in substitution for the fossil fuels, especially renewable sources, as biomass, a eolic and solar, have becomes more and more important, as much from the economic point of view as form the environment point of view, principally for the communities that are distant form central electricity generating stations. The most used forms of energy production are based on intensive use of natural resources. In this work, The Northeast region of Brazil has been taken as reference, where a mean level of solar radiation around 5500 MJ is presented, which is sufficient to have 2,200 peak of sun per year in semi-arid Northeast region the irradiance being 1000 W/m2, with this configuration, a comparison is made with the costs appraised for carrying out the Federal Government Program for rural electrification “Light for all” and it was verified that after on kilometer from a source of energy, in a rural property, it would be more economically viable to use photovoltaic systems, there are examples of this procedure in the interior of the state of Bahia, where local concessionaires are adopting this criterion. It was also verified that the values charged in kWh in urban centers (average value = 0.26 US/kWh), the photovoltaic systems with an incentive of US$ 3.00 dollars for each PV installed, considering US$ 7.00 dollars for already installed PV, the cost of solar energy would become competitive in relation to conventional energy. Considering the increasing importance of energy for the well being of populations distant form the electric network and for the continuation of economic activities, the search for sustainable development needs to pass through an increase in production efficiency and use of energy, allies in the capacity of generation, transmission, distribution and commercialization of alternative sources and renewable sources of energy on a large scale. The development of renewable sources demands serious political and economic effort, especially through laws that guarantee stable tariffs for a period of more than 20 years. The new renewable energy generators, compete with nuclear plants, hydraulic and fossil fuels that produce electricity at low cost due to the depreciation of energy reserves and because users and tax payers have already paid interest on the original investments. Political action becomes necessary to overcome such distortions, to create market conditions for renewable source.

Nanotech 2008 Conference Program Abstract