Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
The potential of a CO2 storage system coupled to a Rankine energy storage system
Submission Author:
Paula Pomaro , MG
Co-Authors:
Paula Pomaro, Rafael Augusto Magalhães Ferreira, Matheus Porto
Presenter: Paula Pomaro
doi://10.26678/ABCM.COBEM2021.COB2021-1554
Abstract
This work presents a novel Rankine-based energy storage system coupled to a carbon storage system (CCS). CCS systems are energy-intensive processes, which makes them not economically feasible. We want to demonstrate that the CCS system can benefit from better energy and economic performance if the stored CO2 is used as the working fluid of an energy generation cycle. The proposed system works through a Rankine cycle and uses the surplus electrical power from the grid to compress the CO2 captured from the power plant to its final storage. Part of the stored CO2 returns to the closed cycle at peak times, receives heat waste from the power plant, and passes through a turbine recovering part of the stored power to the grid. Besides the benefit of storing energy from renewables, connecting a Rankine cycle to the process of carbon capture and storage (CCS) enables the use of heat waste from the thermal power plant and reduces the energy consumption during the CCS process. By applying the first law of thermodynamics, we found out that this coupled ES-CCS system could store about 0,4ton CO2 per cycle and recover 30% of the stored electrical energy when using only the low-temperature heat waste. The results show that such a system has the technical potential of being explored.
Keywords
energy storage, Carbon storage, Rankine cycle
