The Navajo Generating Station was a 2250 MW plant when operatingat full power.
a) Assuming the plant operates at 38% efficiency and that coalhas a heat content of
10,500 BTU/lb, calculate how many tons of coal are used per yearif the plant
operates at full capacity (assume 24 hrs/day, 7 days/week) .
b) Calculate the area needed to replace the power generated byNGS with Si
photocells operating at 21% efficiency assuming an average solarinsolation of 6
kWhr/m2. show all work
