rom Rubin, Problem 13.3: A 120. MW coal

plant wants to add a SOX emissions control system to reduce its emissions. The emission

control system has a capital cost of $815 per kW and reduces SOX emissions by 98% to

0.0918 kg/MWh. Assume the life of the emission control system is 20 years and the power

plant produces 650 GWh/y.

a)What is the annualized cost of this system in dollars per year if the discount rate (interest

rate) is 7.0 percent/year? What if the discount rate is 4.0 percent/year?

b)What is the cost per 1.0399 x 10^4kWh of electricity usage (the average annual U.S.

residential electricity consumption in 2017 according to the EIA) at each of the discount

rates specified in part (a)?

c) What is the cost per metric ton of SOXremoved?

(1 metric ton = 1,000 kg = 10^6g)