Carbon Dioxide Emission Management in Power Generation. Prof. Lars O. Nord

alt="images"/> heat transfer rate kW r radiative forcing W/(kg m²) R specific gas constant kJ/(kg K) R _u universal gas constant kJ/(kmol K) Re Reynolds number s specific entropy on mass basis kJ/(kg K) S entropy kJ/K S _ads adsorption selectivity — t time s or h t _m membrane thickness m T temperature °C or K u absolute velocity m/s U internal energy kJ v specific volume on mass basis m³/kg V volume m³

volumetric flow rate m³/s w specific work on mass basis kJ/kg

specific work on molar basis kJ/kmol W work kJ

power kW x vapour quality kg_vapour/kg_{vapour+liquid} x _i mole fraction in liquid phase for component i — y _i mole fraction in gas phase for component i — Z compressibility factor —

Greek Symbols

α	heat-to-power ratio	kWh/kWe
α i,j	membrane selectivity of components i and j for gas mixture	—
	heat of reaction	kJ
η cap,e	CO2 capture efficiency	—, %
η	efficiency	—, %
η cap	CO2 capture ratio	—, %
η is	isentropic efficiency	—, %
η p	polytropic efficiency	—, %
κ	ratio of specific heats, cp/cv	—
λ	excess air ratio	—
ξ	friction factor	—
ρ	density	kg/m^3
σ	ionic conductivity	S/m
σ inj	CO2 formation by combustion per tonne of CO2 injected	t CO2 by combustion/t CO2 injected
σ store	CO2 formation by combustion per tonne of CO2 stored	t CO2 by combustion/t CO2 stored