Thermodynamic analysis of a zero-emission combustion cycle for energy transition
Kaushal Dave (TU Delft - Flight Performance and Propulsion)
Arvind G. Gangoli Rao (TU Delft - Flight Performance and Propulsion)
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Abstract
The power sector accounts for ∼40% of global energy-related CO2 emissions. Its decarbonization by switching to low-carbon renewables is essential for a sustainable future. Existing electrical grids, however, have limited capacity to absorb the variability introduced by these new energy sources and rely largely on natural-gas-based power generation. For deep decarbonization, alternative solutions to increase grid flexibility are needed. Among these, energy storage is expected to have a key role. This paper proposes a unique energy storage and re-conversion system by coupling the hydrogen combustion in supercritical CO2 (HYCOS) cycle, a zero-emission combustion cycle, with long-term/seasonal energy storage based on green H2 production. This power cycle is expected to be highly scalable and compact and can deliver power at net electrical efficiency between 55% and 60% at distributed generation levels. Thus, it can be highly competitive with existing solutions such as fuel cells, reciprocating engines, and gas turbines.
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