Evacuated flat-plate collectors are better than non-evacuated ones at high operating temperatures because

Renewable Sources of Energy Mcqs
BILAL KHATTAK0

A.convective heat losses from the top cover plate are greatly reduced
B.convective heat losses from the absorber plate are greatly reduced
C.conductive heat losses from the absorber plate are greatly reduced
D.radiative heat losses from the absorber plate are greatly reduced

Related Mcqs:

  1. Compare the heat loss between the absorber plate of flat-plate collector and the cover with that between the cover and the ambient air at steady state.
  2. Which of the following statements about using water as a heat-exchange fluid in flat-plate collectors is not true?
  3. Which of the following is not a good way to improve the performance of a flat-plate solar collector?
  4. The percent transmission of incoming solar radiation through the top cover plate of flat-plate collectors is typically
  5. Which of the following passes through a maximum with increase in the number of covers (glazings) used in a flat-plate solar collector?
  6. Force on a flat stationary plate is
  7. Glass is the most favoured material for the transparent covers to be used in flat-plate collectors. The usual practice is to have 1 or 2 covers with spacings in the range of
  8. Perspiration cools the body by __________?
  9. Which of the following is not a good way to provide freeze protection for a flat-plate collector system?
  10. What is the serious problem with using a thin plastic sheet as the glazing material in a flat-plate solar collector?

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