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Oil platforms are complex structures used to host workers and equipment needed in offshore exploration. This study focuses on the platform's heat and electricity cogeneration plant, which supplies a process heat exchangers net, and provides the necessary electricity for all the equipment used for the process and worker's accommodation in the platform. The platform demand with maximum load is 75 MW, which could be achieved using four gas turbines (25 MW each), one of which is kept for backup purposes or using six dual-fuel engines diesel/natural gas (15 MW each), one of which is also kept for backup purposes. Therefore, the thermodynamic analysis was performed - considering five specific demand points of the platform - comparing the two traditional configurations (gas turbines and dual-fuel engines diesel/natural gas) and a combined configuration. The combined configuration is composed of three gas turbines and two dual-fuel engines diesel/natural gas (one of the gas turbines kept for backup purposes). The configurations presented respectively 35.5%, 48.4% and 42.6% at highest overall efficiency; 611.34 g/kWh, 373.45 g/kWh, 472.74 g/kWh at lowest CO2 emissions considering full attendance of electrical and thermal demands. The configurations using only gas turbines and the combined fully attended the thermal demand of the platform without using auxiliary pieces of equipment. Therefore, it was possible to observe that the combined configuration presented several advantages concerning isolated systems, proving to be an excellent option for sustainable energy generation, reducing emissions of polluting gases and greater flexibility of its operation concerning to configuration only with turbines, and physical occupation in relation to configuration only with engines.

THERMODYNAMIC ANALYSIS OF ELECTRIC POWER PRODUCTION TECHNOLOGIES IN COGENERATION SYSTEMS ON FPSO AIMING TO REDUCE CO2 EMISSIONS