-) Heat is transferred to a heat engine from a furnace at a rate of 90 MW. If the rate of waste
heat rejection to a nearby river is 55 MW. Determine the net power output and the
thermal efficiency of this heat engine.
Answers
Given : Heat is transferred to a heat engine from a furnace at a rate of 90 MW. If the rate of waste heat rejection to a nearby river is 55 MW.
To Find : Determine the net power output and the thermal efficiency of this heat engine.
Solution:
Heat is transferred to a heat engine from a furnace at a rate of 90 MW
INPUT = 90 MW
the rate of waste heat rejection to a nearby river is 55 MW
WASTAGE = 55 MW
net power output = INPUT - WASTAGE
= 90 - 55
= 35MW
thermal efficiency of this heat engine. = (NET OUPUT/ INPUT) * 100
= (35 / 90) * 100
= 38.89 %
NET OUPUT = 55MW
EFFICIENCY = 38.89 %
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