. The cumulative cash flow diagram shown in Fig. 2 illustrates the effect of discount rate on the NPV of the two scenarios along the plant lifetime. In Scenario I, increasing the discount rate resulted in lowered NPV and extended payback time
. Thecumulative cash flow diagram shown in Fig. 2 illustrates the effectof discount rate on the NPV of the two scenarios along the plantlifetime. In Scenario I, increasing the discount rate resulted in loweredNPV and extended payback time