Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
THERMODYNAMIC ANALYSIS OF CASCADE MODELS FOR WASTE HEAT RECOVERY IN AN FPSO UNIT
Submission Author:
Madson John Arcanjo Batista , SP
Co-Authors:
Madson John Arcanjo Batista, Waldyr Gallo, Max Mauro Lozer Reis
Presenter: Madson John Arcanjo Batista
doi://10.26678/ABCM.COBEM2019.COB2019-1344
Abstract
Reducing greenhouse gas emissions, as well as promoting the rational use of natural resources, has been the focus of countless researchers in several sectors. In this scenario is included the Brazilian oil and gas industry, in particular by the increasing exploration of the reservoirs of the pre-salt basin. This work presents the heat recovery system in a Floating Product Storage Offload (FPSO) unit, which is composed by complementary electrical generation subsystem S PCom and SHWa hot water subsystem. The cascade subsystems configuration aims at reducing the levels of irreversibilities generated, among other aspects, by the high temperature gradients. The waste heat source is the exhaust gas from the GE LM2500 and GE LM2000 turbines of the main power generation and CO2 compression systems, respectively. The thermodynamic models is developed in Engineering Equation Solver (EES) to meet the thermal and electric demand over the lifetime cycle of the platform, identifying the conditions of greater exergy efficiency and, consequently, aiming at the reduction of fuel consumption and CO2 emission. The cascade system configuration reduced the thermal gradients, which resulted in diminishing exergy destruction in up to 41% in SHWa. However, significant increasing in the irreversibility in SPCom led to a non-significant rise of the exergy effiency of the system.
Keywords
exergy, ORC, Waste heat Recovery, Cascade system, FPSO
