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. What is the cost per metric ton of SOx removed? (1 metric ton = 1,000 kg = 10^6 g)

Question
Asked Oct 15, 2019
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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.
 
What is the cost per metric ton of SOx removed? (1 metric ton = 1,000 kg = 10^6 g)
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Expert Answer

Step 1

The total capital cost of 120 Mw power plant for the installation of emission control system is,

Total capital cost =(cost for unit kW)x(power plant capacity (in kW))
($815/kW)(120x10'kw)
$9.78 x 10
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Total capital cost =(cost for unit kW)x(power plant capacity (in kW)) ($815/kW)(120x10'kw) $9.78 x 10

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Step 2

The total amount of SOx emission reduced fro...

SOx emission reduced (actual reduction SOx emssion per year)x
(power produced (in 20yrs))
-(0.98)(0.0918 kg/kWh)(650x 10 kWh/yr)(20 yr)
1169.53 x 10° kg
=1169.53 x 103 ton
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SOx emission reduced (actual reduction SOx emssion per year)x (power produced (in 20yrs)) -(0.98)(0.0918 kg/kWh)(650x 10 kWh/yr)(20 yr) 1169.53 x 10° kg =1169.53 x 103 ton

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