Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Energetic and Exergetic analysis of Supercritical CO2, Organic Rankine and Kalina Cycle for waste heat recovery in a FPSO unit.
Submission Author:
Max Mauro Lozer Reis , SP
Co-Authors:
Max Mauro Lozer Reis, Jorge Vidoza Guillen, Waldyr Gallo
Presenter: Max Mauro Lozer Reis
doi://10.26678/ABCM.COBEM2017.COB17-1121
Abstract
This article aims to study various power generation alternatives to improve energy use in an FPSO along different points of its operation. Waste heat recovery is a promising alternative mainly due to its capacity of energy generation with low and intermediate heat sources, allowing to profit waste heat of industrial processes. The heat source used will be the exhaust flue gases of the gas turbines. Supercritical CO2, Kalina and Organic Rankine (ORC) are analyzed and compared from an energetic and exergetic point of view. Thermoflex® and EES are used to develop thermodynamic models, with the scope of studying simultaneously maximum energetic and exergetic efficiency, along with obtained net power. Simulations are realized in identical conditions, in order to compare the different technologies, its vantages and disadvantages. Two production periods were considered. The year 15, in which there is large oil and gas production and the year 18, in which the oil production is declining and the volume of water brought by petroleum is 50% of total. Obtained net power for the regenerative ORC case is equal to 7.8% of total power demand in the first period. In second period only two gas turbines remain operative and the obtained power was lower due to the inferior energetic availability, this result corresponded to 5.0% total required demand for this period.
Keywords
Organic Rankine Cycles (ORCs), • Supercritical cycles, Kalina cycle, FPSO, Exergetic Analysis
