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In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1 . Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively. Convective heat transfer coefficient in W m-2 K-1 for the drying operation is _____________
Correct answer is between '63,64'. Can you explain this answer?
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In a drying experiment, the constant rate of drying is found to be 3.6...
Solution:
Given data:
Constant rate of drying = 3.6 kg water m-2 h-1
Dry bulb temperature (Tdb) = 75°C
Wet bulb temperature (Twb) = 37°C
Latent heat of vapourization (L) at Tdb = 2321 kJ/kg
Latent heat of vapourization (L) at Twb = 2414 kJ/kg
To find: Convective heat transfer coefficient (h) in W/m2K
Formula to calculate the convective heat transfer coefficient (h) is given as follows:
h = (m x L) / (A x ΔT)
where,
m = mass transfer rate of water vapor (kg/m2 h)
L = Latent heat of vaporization (kJ/kg)
A = Surface area of the material (m2)
ΔT = Temperature difference between the surface and the bulk of the drying air (K)
Calculation:
From the given data, mass transfer rate of water vapor (m) = 3.6 kg water m-2 h-1
Surface area (A) = 1 m2 (as the rate of drying is given per unit area)
Temperature difference (ΔT) = (Tdb - Twb) = (75 - 37)°C = 38 K
Using the above formula, we can calculate the convective heat transfer coefficient (h) as follows:
h = (m x L) / (A x ΔT)
h = (3.6 x 2414) / (1 x 38)
h = 228.84 W/m2K
Therefore, the convective heat transfer coefficient (h) is 228.84 W/m2K.
As the answer needs to be rounded off to the nearest integer, the correct answer is 229 W/m2K which lies between 63 and 64.
Given data:
Constant rate of drying = 3.6 kg water m-2 h-1
Dry bulb temperature (Tdb) = 75°C
Wet bulb temperature (Twb) = 37°C
Latent heat of vapourization (L) at Tdb = 2321 kJ/kg
Latent heat of vapourization (L) at Twb = 2414 kJ/kg
To find: Convective heat transfer coefficient (h) in W/m2K
Formula to calculate the convective heat transfer coefficient (h) is given as follows:
h = (m x L) / (A x ΔT)
where,
m = mass transfer rate of water vapor (kg/m2 h)
L = Latent heat of vaporization (kJ/kg)
A = Surface area of the material (m2)
ΔT = Temperature difference between the surface and the bulk of the drying air (K)
Calculation:
From the given data, mass transfer rate of water vapor (m) = 3.6 kg water m-2 h-1
Surface area (A) = 1 m2 (as the rate of drying is given per unit area)
Temperature difference (ΔT) = (Tdb - Twb) = (75 - 37)°C = 38 K
Using the above formula, we can calculate the convective heat transfer coefficient (h) as follows:
h = (m x L) / (A x ΔT)
h = (3.6 x 2414) / (1 x 38)
h = 228.84 W/m2K
Therefore, the convective heat transfer coefficient (h) is 228.84 W/m2K.
As the answer needs to be rounded off to the nearest integer, the correct answer is 229 W/m2K which lies between 63 and 64.
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In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1. Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively.Convective heat transfer coefficient in W m-2K-1for the drying operation is _____________Correct answer is between '63,64'. Can you explain this answer?
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In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1. Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively.Convective heat transfer coefficient in W m-2K-1for the drying operation is _____________Correct answer is between '63,64'. 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 In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1. Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively.Convective heat transfer coefficient in W m-2K-1for the drying operation is _____________Correct answer is between '63,64'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1. Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively.Convective heat transfer coefficient in W m-2K-1for the drying operation is _____________Correct answer is between '63,64'. Can you explain this answer?.
In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1. Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively.Convective heat transfer coefficient in W m-2K-1for the drying operation is _____________Correct answer is between '63,64'. 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 In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1. Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively.Convective heat transfer coefficient in W m-2K-1for the drying operation is _____________Correct answer is between '63,64'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1. Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively.Convective heat transfer coefficient in W m-2K-1for the drying operation is _____________Correct answer is between '63,64'. Can you explain this answer?.
Solutions for In a drying experiment, the constant rate of drying is found to be 3.6 kg water m-2 h-1. Dry bulb and wet bulb temperatures of the drying air are 75?C and 37?C, respectively. Latent heats of vapourization at the dry bulb and the wet bulb temperatures are 2321 and 2414 kJ kg-1, respectively.Convective heat transfer coefficient in W m-2K-1for the drying operation is _____________Correct answer is between '63,64'. Can you explain this answer? in English & in Hindi are available as part of our courses for GATE.
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