In recent years, the volatile feed-in of renewable energy sources has sent electricity prices into daily rollercoasters, requiring combined cycle gas turbines (CCGT) to move from baseload to two or even three cycles a day.
This stop-start approach means precious steam is being dumped and wasted. Storing steam and turning it to power captures, stores and recycles excess steam, allowing it to be re-used for auxiliary processes as needed.
Usually payback in <5 years. Depending on the CCGT design, you can save gas and carbon certificate costs for auxiliary boiler when CCGT is stopped, and earn additional money from electricity markets when CCGT is running due to less steam being extracted from the steam turbine.
Harness increased security of supply, with auxiliary boilers usually remaining as backup in cold standby increasing redundancy to n-2. Increased operational flexibility of the CCGT plant.
Steam-BOP-package including piping, pressure vessel, valves and instrumentation. Depending on customer requirements usually implemented within plant distributed control system (DCS).
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