Assessing Operating Regimes of CCS Power Plants in High Wind and Energy Storage Scenarios

The Economic Value of Flexible Ccs in Net-Zero Electricity Systems the Case of the UK

“…There are two types of flexible CCS discussed in the literature: (i) a flexible venting CCS system and (ii) a flexible storage CCS system. Works such as Rao & Rubin (2006), Ludig et al (2011), Bruce et al (2014), Errey et al (2014), Manaf et al (2016), andSingh et al (2022) studied CCS processes of variable capture rates that optimise the marginal capture rate (tons of CO2 captured over tons of CO2 vented pre-capture) with respect to the additional cost of higher capture performance and electricity costs. Studies such as Domenichi et al (2013), Mac Dowell and Shah (2015), Flø et al (2016), Sanchez Fernandez et al (2016, Khorshidi et al (2016), andCheng et al (2022) looked at storing CO2 inside the aqueous monoethanolamine (MEA) capture solvent during peak electricity prices and regenerated the solvent during off-peak windows.…”

“…Their results indicated better economic performance at lower capture rates under existing market conditions. Furthermore, Ludig et al (2011) and Bruce et al (2014) found flexible CCS venting could be better implemented within markets with higher VRE source penetration. Errey et al (2014) studied the cost drivers of this strategy and noted that a granular control of a flexible venting CCS decision framework would experience the maximal economic benefit.…”

An alternate wind power integration mechanism: Coal plants with flexible amine-based CCS

“…Our work studying a hybrid system with flexible operation of the CCS unit through amine storage technology [18], indicates that for electricity prices justifying investments in amine storage, the hybrid system enables considerable quantities of wind power integration (within the range of 18e32% of the system nameplate capacity) and a significant increase in profits and decrease in LCOE and CoC, relative to a CCS retrofitted coal plant operating continuously [18]. Similarly, an investigation of the operating regimes of CCS power plants in future generation portfolios with significant wind power generation in Great Britain demonstrates the importance of optimally scheduling the on/off operation of CCS units for increased profits and wind power integration [19]. In [20] it is demonstrated that flexible operation of CCS yields higher profits than operation of CCS strictly with or without carbon capture (i.e.…”