Encontro de Energia no Meio Rural
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Resumo

JARA, Raúl Benito Siche e RODRIGUEZ, Enrique Ortega. Cálculo do indice de renovabilidade emergética na avaliação da sustentabilidade de uma economia nacional.. In: ENCONTRO DE ENERGIA NO MEIO RURAL, 6., 2006, Campinas. Anais eletrnicos... Disponvel em: <http://www.proceedings.scielo.br/scielo.php?script=sci_arttext&pid=MSC0000000022006000100031&lng=pt&nrm=abn>. Acesso em: 18 Abr. 2024.

In this study, the emergy methodology was used to analyze the sustainability of the Peruvian economic system. The resources (natural and not natural) and importations had been accounting in units of solar emergy using data of the Peruvian economy for the year 2004. Emergy is an energy measure based in the contribution of the resources and its influence, defined as the energy of a type required producing a flow or storage of another type. The focus of this study is the calculation of the emergy index call "renewability" (REN), considered as a general measure of the ecological sustainability. In a long period, only systems or processes with high REN are sustainable. This index is calculated by the accounting of the resources renewed used in the economy in emergy units (2.17E+23 seJ) and divided by emergy total that enters to the economic system (6.93E+23 seJ), resulting a REN of 0.31. The renewable resources that use Peru almost represent 20% of the total of renewable resources available in the system. The great amount of renewable resources that Peru can potentially use was calculated in 11.44E+23 seJ, meaning that the system can be more sustainable if the economy is based on increasing the use of renewable resources and to diminish the use of non-renewable resources and imported resources. These data show that Peru has a relatively sustainable economy that can improve or get worse, depending of its politics in the use of resources.

Palavras-chave : Emergia; sustentabilidade; renovabilidade; recursos naturais; renováveis.