What is CCS (three word answer expected). For the third word I often refer to it as sequestration (but due to the negative connotation of the use of this word in budgets, the terminology use has been discontinued by many governments). I am looking for the alternative S word here.

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency