S1  Análise de Sistemas Energéticos    Titulo: ESTUDOS COM AVALIAÇÃO ENERGÉTICO-ECONÔMICA PARA A REPOTENCIAÇÃO DAS UNIDADES GERADORAS DA UHE COARACY NUNES   Resumo : KEY WORDS: REHABILITATION, HYDRAULIC TURBINES, EVALUATION, ENERGY-ECONOMICAL ABSTRACT. COARACY NUNES HYDROPOWER PLANT, LOCATED IN ARAGUARI RIVER, IN THE STATE OF AMAPÁ, HAS TWO VERTICAL AXIS KAPLAN TURBINES, WITH 20MW EACH, AND A 30MW KAPLAN IN ASSEMBLY. THE COMMERCIAL OPERATION OF THE FIRST TWO UNITS BEGAN IN 1975. NOWADAYS THESE UNITS ARE OPERATING UNDER HARD CAVITATION, THAT HAS BEEN CAUSING AN EXCESSIVE BLADES EROSION AND CONSEQUENTLY SUCESSIVE FORCED MAINTENANCE STOPS. CONSIDERING THE UNITS PRESENT STATE, THE HYDRAULIC TURBINES DESIGN EVOLUTION AND THE INCREASING DEMAND OF ENERGY (AROUND 10% A YEAR), ELETRONORTE DECIDED TO ACCOMPLISH STUDIES ON REHABILITATION ALTERNATIVES WITH ENERGY-ECONOMICAL EVALUATION FOR THESE UNITS. WERE STUDIED AND APPRAISED 5 REHABILITATION/MODERNIZATION OF THESE GENERATING UNITS. BESIDES TO DEFINE THE MOST ADVANTAGEOUS ALTERNATIVE FOR THIS SEVICES, THESE STUDIES ALSO EVALUATED THE PROJECT FEASIBILITY UNDER CCC INFLUENCE AND BEST PERIOD TO ACCOMPLISH THESE SERVICES. THIS WORK HAS THE MAIN PURPOSE TO SHOW THE STUDIES/RESULTS, PROCEDURES AND METHODOLOGIES THAT TOOK THE DEFINITION OF THE BEST ALTERNATIVE OF REFORM OF THESE UNITS, AND SEEKING A CONTRIBUTION FOR FUTURE STUDIES OF REHABILITATION OF GENERATING UNITS.     Autores : Calainho, José Alberto Lage Gonçalves, Carmo - Horta, Cid Antunes Lomônaco, Fernando Gillet     Trabalho Completo :   COBEM99 | Comissão  Organizadora | Palestras | Sessões Técnicas | Autor | Simpósios e Sessões Especiais | Revisores |  Título  dos  Trabalhos | Local