Solar Thermal Collectors

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Questions and Answers

What is the purpose of the transparent cover in a flat-plate solar collector?

  • To increase conduction losses
  • To enhance absorption of solar radiation
  • To reduce convection and radiation losses (correct)
  • To allow easy access for maintenance

Why are flat-plate collectors advantageous compared to other types of solar collectors?

  • They are less expensive to manufacture
  • They collect both beam and diffuse radiation (correct)
  • They are more efficient in tracking the sun
  • They require less maintenance

What is the optimum orientation for flat-plate collectors in the Northern Hemisphere?

  • Directly toward the equator, facing south (correct)
  • Directly toward the equator, facing north
  • Directly toward the poles, facing north
  • Directly toward the poles, facing south

Why is the underside of the absorber plate and the two sides well insulated?

<p>To reduce conduction losses (D)</p> Signup and view all the answers

What is the major purpose of flat-plate collectors' design consideration?

<p>To collect as much solar energy as possible at the lowest total cost (A)</p> Signup and view all the answers

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Study Notes

Flat-Plate Solar Collectors

  • The transparent cover in a flat-plate solar collector allows sunlight to pass through and reach the absorber plate, while preventing heat from escaping.
  • Flat-plate collectors are advantageous due to their simplicity, low cost, and ease of maintenance compared to other types of solar collectors.
  • In the Northern Hemisphere, the optimum orientation for flat-plate collectors is typically south-facing, tilted at an angle equal to the latitude of the location.
  • The underside of the absorber plate and the two sides are well insulated to minimize heat loss and maximize energy absorption.
  • The major design consideration for flat-plate collectors is to maximize the surface area for heat absorption while minimizing heat loss.

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