CE 11 HW 8 - CE 11 HW 8 Eddie Lo 19483002 1. A) Coal

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CE 11 HW 8 Eddie Lo 19483002 1. A) Coal , * . * . * * * = . 5 000kWhyr 1 31 3 6 103kJkWh kg28400 kJ ton1000 kg 2 044tonyr If a Mini Cooper is about 1 ton, this is 2 Mini Coopers. If a Ford Explorer is 2.5 tons, this is almost 1 Explorer. B) Capacity of Electric generation . * * * * * = 6 7 106 people house4 people 5000kWhyr yr8670 hr MW1000 kWh 956 MW C) If only 20% from coal, . * . * * . * = , 2 2 044tonyr house4 people 6 7 106people 684 740tonsyr D) If 700,000 ton coal/yr, 9.5% of that is 66,500 ton ash/yr. If 20% of that is bottom ash, then there is 13,300 ton bottom ash/yr. That means there’s 80% of the ton ash/yr is fly ash, or 53,200 ton fly ash/yr. E) , = + = SO2 released so g SO2 32 216 64 g SO2 , * . * 700 000ton coalyr 0 04 64 g SO232 g S = , 56 000tonyr F) Sulfur is limited to * * = . = . % 520ngJ kg1012 ng28400 kJkg 1000 JkJ 0 0147 1 47 S G) According to evomarkets, the current offer price is $4/ ton SO2 so the total cost is * = , 2000 ton SO2yr $4ton SO2 $8 000 2. a) Seven “grand challenges” were written about in this paper. Please identify and briefly describe
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CE 11 HW 8 - CE 11 HW 8 Eddie Lo 19483002 1. A) Coal

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