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Steam condensing on the outer surface of a thin-walledcircular tube of diameter D-50 mm and length L= 6 mmaintains a uniform outer surface temperature of 100 °CWater flows through the tube at a rate m= 0.25 kg/s, andits inlet bulk temperature is To= 15 °C. Determine:a) If the flow is laminar or turbulentb) The exit bulk temperaturee) T (C) h (W/m2.K)d) Rate of heat transfer from steam to watere) A plot of T vs x, where x is the distance in axialdirection along the pipeState any assumptions made, and use T57 °C. OnlyL, guessone iteration is needed.

Question

Please answer The test part d and e From this  problem The test is akredytacji solved thank you 

Steam condensing on the outer surface of a thin-walled
circular tube of diameter D-50 mm and length L= 6 m
maintains a uniform outer surface temperature of 100 °C
Water flows through the tube at a rate m= 0.25 kg/s, and
its inlet bulk temperature is To= 15 °C. Determine:
a) If the flow is laminar or turbulent
b) The exit bulk temperature
e) T (C) h (W/m2.K)
d) Rate of heat transfer from steam to water
e) A plot of T vs x, where x is the distance in axial
direction along the pipe
State any assumptions made, and use T
57 °C. Only
L, guess
one iteration is needed.
help_outline

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Steam condensing on the outer surface of a thin-walled circular tube of diameter D-50 mm and length L= 6 m maintains a uniform outer surface temperature of 100 °C Water flows through the tube at a rate m= 0.25 kg/s, and its inlet bulk temperature is To= 15 °C. Determine: a) If the flow is laminar or turbulent b) The exit bulk temperature e) T (C) h (W/m2.K) d) Rate of heat transfer from steam to water e) A plot of T vs x, where x is the distance in axial direction along the pipe State any assumptions made, and use T 57 °C. Only L, guess one iteration is needed.

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Step 1

Since we only answer up to 3 sub-parts, we’ll answer the first 3 parts. Please resubmit the question and specify the other subparts (up to 3) you’d like answered.

Given:

Inlet tempetature of water, T 15° C
Surface temperature of the tube, T = 100°C
Mass flow rate of water,m 0.25kg/s
Diameter of the tube,D = 50mm
Length of the tube,L =10m
D-50mm
T100C
m-0.25kg/s
T 16°C
10m
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Inlet tempetature of water, T 15° C Surface temperature of the tube, T = 100°C Mass flow rate of water,m 0.25kg/s Diameter of the tube,D = 50mm Length of the tube,L =10m D-50mm T100C m-0.25kg/s T 16°C 10m

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Step 2

(a)

The velocity of water is calculated using the formula:

m pAV p(Tr2V ,where r -Radius
0.25 1000x Tx(25 x 103) xV
V 0.127m/s
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m pAV p(Tr2V ,where r -Radius 0.25 1000x Tx(25 x 103) xV V 0.127m/s

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Step 3

The Reynold no. is ...

VD
R
where v Kinematic viscosity of water
0.127x50x10
10-5
R. 6350
as Reynolds no. is greater than 2300, Hense, the flow is Turbulant
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VD R where v Kinematic viscosity of water 0.127x50x10 10-5 R. 6350 as Reynolds no. is greater than 2300, Hense, the flow is Turbulant

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