A 6 cm diameter cylinder is initially at a temperature of 10 °C. Later, thiscylinder was thrown into water at 80°C. Calculate how long it will take for thecenter temperature of the cylinder to reach 50 °C by taking the convection heattransfer coefficient as 80W / /m?K.Thermal properties of the cylinder materialk=0,587 W/m°Cwwwwa = 0,13 x10 * m /sattachmentsHeisler diagrams for cylinder1.0F1005030120.70.50.40.30.22.5 3.00.1302B hr0.070.050.040.030,020.0070.0050.0040.000.0020.001! 2 3468 101214 16 18 20 22 24 26 28 30 40 50 60 70 B0 90100 115 130 150200 300kenle)= Fo1.00.20.90.8 0.40.70.60.60.50.40.3 0.80.20.90.11.08.01 0.02 0.05 0.1 O.20.5 1.0 2 3 5 10 20CA/hr)- Bi50 100T-T

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A 6 cm diameter cylinder is initially at a temperature of 10 °C. Later, this cylinder was thrown into water at 80°C. Calculate how long it will take for the center temperature of the cylinder to reach 50 °C by taking the convection heat transfer coefficient as 80w / /m2K.

A 6 cm diameter cylinder is initially at a temperature of 10 °C. Later, this cylinder was thrown into water at 80°C. Calculate how long it will take for the center temperature of the cylinder to reach 50 °C by taking the convection heat transfer coefficient as 80w / /m2K.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.36P

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Concept explainers

Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.

Question

A 6 cm diameter cylinder is initially at a temperature of 10 °C. Later, this
cylinder was thrown into water at 80°C. Calculate how long it will take for the
center temperature of the cylinder to reach 50 °C by taking the convection heat
transfer coefficient as 80W / /m?K.
Thermal properties of the cylinder material
k=0,587 W/m°C
wwww
a = 0,13 x10 * m /s
attachments
Heisler diagrams for cylinder
1.0
F100
50
30
12
0.7
0.5
0.4
0.3
0.2
2.5 3.0
0.1
3
02
B hr
0.07
0.05
0.04
0.03
0,02
0.007
0.005
0.004
0.00
0.002
0.001
! 2 3
468 101214 16 18 20 22 24 26 28 30 40 50 60 70 B0 90100 115 130 150200 300
kenle)= Fo
1.0
0.2
0.9
0.8 0.4
0.7
0.6
0.6
0.5
0.4
0.3 0.8
0.2
0.9
0.1
1.0
8.01 0.02 0.05 0.1 O.2
0.5 1.0 2 3 5 10 20
CA/hr)- Bi
50 100
T-T

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