QQuestionEngineering
QuestionEngineering
"Which of the following is the best example of cogeneration?
A. A power plant uses both coal and natural gas as fuel.
B. A trash-to-steam power plant accepts both residential and commercial waste.
C. Several power plants supply the same city with electrical energy.
D. Emissions from power plants are captured and stripped of sulfur for commercial sale.
E. A coal-fired power plant captures waste heat and uses it to heat adjacent buildings."
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Answer
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Step 1:Let's solve this step by step:
Step 2:: Understanding Cogeneration
Cogeneration (combined heat and power) is a process where a power plant simultaneously generates electricity and useful thermal energy from a single fuel source. The key is that waste heat from electricity generation is captured and used for another productive purpose, rather than being wasted.
Step 3:: Analyzing the Options
A. Using multiple fuel types is not cogeneration B. Accepting different types of waste is not cogeneration C. Multiple power plants supplying a city is not cogeneration D. Emissions processing is not cogeneration E. Capturing waste heat from power generation and using it to heat nearby buildings IS cogeneration
Step 4:: Identifying the Best Example
Option E perfectly demonstrates the core principle of cogeneration: - Electricity is generated by the coal-fired power plant - Waste heat that would normally be discarded is instead captured - The captured heat is used to warm adjacent buildings - This increases overall energy efficiency - Reduces total energy waste - Provides a secondary useful purpose for the thermal energy
Final Answer
A coal-fired power plant captures waste heat and uses it to heat adjacent buildings. This is the most accurate and complete example of cogeneration, where electricity generation and thermal energy utilization occur simultaneously from a single energy source.
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