Solar Energy Collection Methods
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Questions and Answers

What is a primary advantage of volumetric air collectors compared to liquid collectors?

  • They are more effective in retaining heat due to insulation.
  • They can efficiently utilize diffuse solar radiation.
  • They can achieve higher temperature ranges than liquid collectors.
  • They are less likely to experience issues with leaks. (correct)

    • Which type of collector primarily relies on directly tracking solar radiation for optimal efficiency?

  • Parabolic trough collectors (correct)
  • Volumetric air collectors
  • Evacuated tube collectors
  • Flat plate collectors

    • What unique feature allows evacuated tube collectors to trap heat efficiently?

  • High thermal conductivity of the flow tubes used.
  • The vacuum within the glass tubes preventing heat loss. (correct)
  • The absorption plate design optimizing solar capture.
  • The use of special glazing materials against UV radiation.

    • What is a key characteristic of the Fresnel collector compared to traditional parabolic troughs?

    <p>Fresnel collectors are generally simpler and cheaper.</p> Signup and view all the answers

    Which of the following applications would primarily utilize the output from concentrating collectors?

    <p>Driving engines for power generation.</p> Signup and view all the answers

    Which of the following statements best describes solar irradiance at the Earth's surface?

    <p>At 40° north latitude, the noontime radiation rate can reach approximately 946 W/m2 on a clear day.</p> Signup and view all the answers

    What is the role of solar thermal collectors in maximizing energy collection?

    <p>They track the sun to maintain a perpendicular angle to the rays.</p> Signup and view all the answers

    What percentage of the sun's energy is realistically captured by a solar collector, considering imperfections in design and varying sunlight conditions?

    <p>53%</p> Signup and view all the answers

    Which of the following statements is correct regarding the historical classification of energy sources?

    <p>Natural gas, coal, and oil were at some points classified as alternative energy sources.</p> Signup and view all the answers

    How does the solar constant relate to solar irradiance at the Earth's surface?

    <p>The solar constant defines the energy received at a distance of 1 astronomical unit from the sun.</p> Signup and view all the answers

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