The Comanche 3 power plantcurrently being constructed in Pueblo, CO, by Xcel Ene

Question

The Comanche 3 power plantcurrently being constructed in Pueblo, CO,
by Xcel Energy will produce 750 MW of power. This plant usessupercritical boiler
technology which will boost the thermal efficiency to 42%. Theplant uses Powder River
Basin coal from Gillette, WY, that has a heating value of 8,500BTU/lbm.
Find the amount of coal burned in this plant each year.

Explanation / Answer

let m is the mass heating value = 8,500BTU/lbm =>heating value = 8,500 *BTU/lbm powerW= 750MW efficiency =42% 1BTU=0.293071 W·h so,m*8500*0.293071*0.42=750*106*365*24 => the amount ofcoal burned in this plant each year, m=6.27948905 ×109 lbm

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