The overall efficiency of a power plant can be increased by "co-generation", that is, by ________.
A) recycling the waste heat from a power plant back to the boiler
B) raising the temperature of the steam by the use of two boilers
C) combining two types of steam engines to generate electricity
D) generating electricity and using some of the waste heat to provide process steam

Question

Quizplus · Accepted Answer

Co-generation involves generating electricity and using some of the waste heat to provide process steam, which increases the overall efficiency of the power plant. Recycling waste heat (choice A) is a part of co-generation, but not the complete solution. Raising the temperature of steam by the use of two boilers (choice B) and combining two types of steam engines (choice C) may increase efficiency, but they are not specific to co-generation.

The Overall Efficiency of a Power Plant Can Be Increased