Análise de implantação da usina termelétrica a gás em Coari - AM

Abstract

In Amazonas, most of the municipalities are not connected to the National Interconnected System (SIN), and it is necessary to hire Independent Energy Producers (PIE) to meet local demand. In these municipalities, diesel thermoelectric plants are usually presented as the most viable option for energy generation. This fuel was used in the generation of electricity in Coari until 2020, when Siemens started operating a gas-fired thermoelectric plant in the city. The main objective of this work is to analyze the operating conditions of the new plant and the results achieved. As an introduction, the energy sector in the country and in the state of Amazonas was addressed, as a way of contextualizing and justifying the relevance of the theme. There was also a brief presentation of the installed plant, raising hypotheses and questions about it. Data regarding the supply contract and average fuel price were obtained through agencies and public companies in the sector, such as ANEEL and EPE. After the presentation of the theoretical framework, technical data disclosed by the turbine manufacturer (Siemens) was collected. The simulation software RETScreen, developed by the Government of Canada, made it possible to carry out the analyses. The results showed that the project is economically profitable for the company contracted to supply the energy and that the electricity generated in the gas plant with combined cycle costs 73% less than the energy produced in the diesel plants. The maximum power achieved by the plant was 38,891 kWh and the combined cycle efficiency was calculated at 49.63%. Finally, comparisons were made between the performance of the plant in simple and combined cycles, showing the relevance of the heat recovery system.