Question

A large coal fired power plant has an efficiency of 45% and produces net 1,500 MW of electricity. Coal releases 25 000 kJ/kg as it burns so how much coal is used per hour

Answer 1

133.33 kg/s

Step-by-step explanation:

Calculation for how much coal is used per hour

Using this formula

Coal used per hour=(Net MW of electricity*1,000 / Efficiency%* Released kJ/kg

Let plug in the formula

Coal used per hour=1,500 MW*1,000/0.45*25,000 kJ/kg

Coal used per hour=1,500,000/11,250kJ/kg

Coal used per hour=133.33 kg/s

Therefore how much coal is used per hour is 133.33 kg/s