Which part of flat plate collectors is coated in black?a.insulationb.absorber platec.transparent coverd.fins

Break Down the Problem

1. Identify the parts of a flat plate collector.
2. Determine which part is typically coated in black to enhance heat absorption.

Relevant Concepts

• Flat plate collectors are commonly used in solar thermal energy systems.
• The absorber plate's material and coating are crucial for efficient heat absorption.

Analysis and Detail

The main components of a flat plate collector are:

1. Insulation: Prevents heat loss.
2. Absorber Plate: Directly absorbs solar energy; often coated black to enhance absorption.
3. Transparent Cover: Allows sunlight in while reducing heat loss.
4. Fins: Help in heat transfer but are not generally the coated part.

Given standard practices, the part coated in black for effective solar absorption is the absorber plate. The black coating improves the plate's ability to absorb sunlight, converting it to heat efficiently.

Verify and Summarize

Since the question specifically asks which part is coated in black, the absorber plate is the correct option. The other components (insulation, transparent cover, fins) do not have black coatings for the purpose of maximizing solar energy absorption.

Final Answer

The correct answer is b. absorber plate.