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Calculate the rate of heat dissipation of a bearing, if it has a rubbing velocity of 1.57 m/s. The bearing is 80mm in length. Viscosity of this oil at the oil temperature of 50℃ is 0.050kg/ms. The temperature of the bearing is 85℃ and surrounding temperature is 30℃, assume energy dissipation coefficient to be 209.34 W/m2℃ and speed of journal is 600RPM.
  • a)
    46.055 W
  • b)
    39.25 W
  • c)
    75.14 J/s
  • d)
    65.142 J/s
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Calculate the rate of heat dissipation of a bearing, if it has a rubb...
Given: V = 1.57 m/s L = 0.08m
tb = 85℃ ta = 30℃
Kd = 209.34 W/m2℃.
Diameter of bearing:
V = πDN/60
1.57 = πD×600/60
D = 0.05 m
Rate of heat dissipation:
Hd = KdDL(t,-ta)
= 209.34 × 0.05 × 0.08(85 - 30)
Hd = 46.055 W
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Calculate the rate of heat dissipation of a bearing, if it has a rubbing velocity of 1.57 m/s. The bearing is 80mm in length. Viscosity of this oil at the oil temperature of 50℃ is 0.050kg/ms. The temperature of the bearing is 85℃ and surrounding temperature is 30℃, assume energy dissipation coefficient to be 209.34 W/m2℃ and speed of journal is 600RPM.a)46.055 Wb)39.25 Wc)75.14 J/sd)65.142 J/sCorrect answer is option 'A'. Can you explain this answer?
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Calculate the rate of heat dissipation of a bearing, if it has a rubbing velocity of 1.57 m/s. The bearing is 80mm in length. Viscosity of this oil at the oil temperature of 50℃ is 0.050kg/ms. The temperature of the bearing is 85℃ and surrounding temperature is 30℃, assume energy dissipation coefficient to be 209.34 W/m2℃ and speed of journal is 600RPM.a)46.055 Wb)39.25 Wc)75.14 J/sd)65.142 J/sCorrect answer is option 'A'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about Calculate the rate of heat dissipation of a bearing, if it has a rubbing velocity of 1.57 m/s. The bearing is 80mm in length. Viscosity of this oil at the oil temperature of 50℃ is 0.050kg/ms. The temperature of the bearing is 85℃ and surrounding temperature is 30℃, assume energy dissipation coefficient to be 209.34 W/m2℃ and speed of journal is 600RPM.a)46.055 Wb)39.25 Wc)75.14 J/sd)65.142 J/sCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Calculate the rate of heat dissipation of a bearing, if it has a rubbing velocity of 1.57 m/s. The bearing is 80mm in length. Viscosity of this oil at the oil temperature of 50℃ is 0.050kg/ms. The temperature of the bearing is 85℃ and surrounding temperature is 30℃, assume energy dissipation coefficient to be 209.34 W/m2℃ and speed of journal is 600RPM.a)46.055 Wb)39.25 Wc)75.14 J/sd)65.142 J/sCorrect answer is option 'A'. Can you explain this answer?.
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