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Consider an enclosure formed by three surfaces having the following values of shape factors, emissivities and temperatures 
 
Surface 1 i.e. curved cylindrical has an emissivity 0.75 and temperature 800 K
Surface 2 i.e. closing disc has an emissivity 0.8 and temperature 700 K
Surface 3 i.e. closing disc has an emissivity 0.8 and temperature 700 K
The closing flat discs are 25 mm in diameter and they have interspacing distance equal to 100 mm. If the shape factor between these two identical discs is 0.05, calculate the net rate of radiant heat flow from the curve surface to each of the closing end surface
  • a)
    1.561 W
  • b)
    2.561 W
  • c)
    3.561 W
  • d)
    4.561 W
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Consider an enclosure formed by three surfaces having the following va...
 F 21 + F 23 + 1 and A = 0.00785 m2, A= 0.000491 m2. Then from reciprocity theorem, F 12 = 0.0594. Q12 = F 12 σ (T 1– T 2 4) = 3.561 W.
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Consider an enclosure formed by three surfaces having the following values of shape factors, emissivities and temperaturesSurface 1 i.e. curved cylindrical has an emissivity 0.75 and temperature 800 KSurface 2 i.e. closing disc has an emissivity 0.8 and temperature 700 KSurface 3 i.e. closing disc has an emissivity 0.8 and temperature 700 KThe closing flat discs are 25 mm in diameter and they have interspacing distance equal to 100 mm. If the shape factor between these two identical discs is 0.05, calculate the net rate of radiant heat flow from the curve surface to each of the closing end surfacea)1.561 Wb)2.561 Wc)3.561 Wd)4.561 WCorrect answer is option 'C'. Can you explain this answer?
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Consider an enclosure formed by three surfaces having the following values of shape factors, emissivities and temperaturesSurface 1 i.e. curved cylindrical has an emissivity 0.75 and temperature 800 KSurface 2 i.e. closing disc has an emissivity 0.8 and temperature 700 KSurface 3 i.e. closing disc has an emissivity 0.8 and temperature 700 KThe closing flat discs are 25 mm in diameter and they have interspacing distance equal to 100 mm. If the shape factor between these two identical discs is 0.05, calculate the net rate of radiant heat flow from the curve surface to each of the closing end surfacea)1.561 Wb)2.561 Wc)3.561 Wd)4.561 WCorrect answer is option 'C'. Can you explain this answer? for Chemical Engineering 2024 is part of Chemical Engineering preparation. The Question and answers have been prepared according to the Chemical Engineering exam syllabus. Information about Consider an enclosure formed by three surfaces having the following values of shape factors, emissivities and temperaturesSurface 1 i.e. curved cylindrical has an emissivity 0.75 and temperature 800 KSurface 2 i.e. closing disc has an emissivity 0.8 and temperature 700 KSurface 3 i.e. closing disc has an emissivity 0.8 and temperature 700 KThe closing flat discs are 25 mm in diameter and they have interspacing distance equal to 100 mm. If the shape factor between these two identical discs is 0.05, calculate the net rate of radiant heat flow from the curve surface to each of the closing end surfacea)1.561 Wb)2.561 Wc)3.561 Wd)4.561 WCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Chemical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider an enclosure formed by three surfaces having the following values of shape factors, emissivities and temperaturesSurface 1 i.e. curved cylindrical has an emissivity 0.75 and temperature 800 KSurface 2 i.e. closing disc has an emissivity 0.8 and temperature 700 KSurface 3 i.e. closing disc has an emissivity 0.8 and temperature 700 KThe closing flat discs are 25 mm in diameter and they have interspacing distance equal to 100 mm. If the shape factor between these two identical discs is 0.05, calculate the net rate of radiant heat flow from the curve surface to each of the closing end surfacea)1.561 Wb)2.561 Wc)3.561 Wd)4.561 WCorrect answer is option 'C'. Can you explain this answer?.
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