An electrical generating plant operates at a boiler temperature of 220°C and exhausts the unused heat into a nearby river at 19°C.If the generating plant has a power output of 800 megawatts (MW)and if the actual efficiency is 3/5 the theoretical efficiency,how much heat per second must be delivered to the boiler? (0°C = 273 K)
A) 5200 MW
B) 1810 MW
C) 3270 MW
D) 2620 MW

Question

Quizplus · Accepted Answer

The theoretical efficiency is calculated using the Carnot efficiency formula: 1 - (T_cold/T_hot). The actual efficiency is 3/5 of this value. Using the actual efficiency and the power output, we can find the heat input required.

An Electrical Generating Plant Operates at a Boiler Temperature of 220°C