What is the role of mirrors in Concentrated Solar Power (CSP) systems?

What is the role of mirrors in Concentrated Solar Power (CSP) systems?

• A. To focus sunlight onto a small area to generate high temperatures for steam production.
• B. To reflect light into the atmosphere
• C. To absorb heat in the atmosphere
• D. To store heat in the mirrors

Answer: (A)

Mirrors in CSP systems are used to collect and concentrate sunlight onto a small receiver. By shaping and tilting the reflective surfaces, they focus the broad solar beam into a tiny, highly energized spot where the receiver absorbs the energy and heats a working fluid to very high temperatures. That heat is then used to produce steam, which drives a turbine to generate electricity. Heat storage, when used, is in the fluid or a separate thermal storage medium, not in the mirrors themselves. The other options don’t fit because reflecting energy back into the atmosphere loses the solar input, absorbing heat in the atmosphere isn’t how CSP captures energy, and storing heat in the mirrors would be inefficient and is not how these plants operate.

Mirrors in CSP systems are used to collect and concentrate sunlight onto a small receiver. By shaping and tilting the reflective surfaces, they focus the broad solar beam into a tiny, highly energized spot where the receiver absorbs the energy and heats a working fluid to very high temperatures. That heat is then used to produce steam, which drives a turbine to generate electricity. Heat storage, when used, is in the fluid or a separate thermal storage medium, not in the mirrors themselves. The other options don’t fit because reflecting energy back into the atmosphere loses the solar input, absorbing heat in the atmosphere isn’t how CSP captures energy, and storing heat in the mirrors would be inefficient and is not how these plants operate.