Find the average film coefficient heat transfer on the water side of single-pass steam condenser. The inner diameter of the tube is 23 mm and cooling water enters at 15°C and leaves at 25°C. The average water velocity is 2.1 m/s. Sketch the system and show the temperature distribution. Properties of water are given below. Find the heat transfer per metre length of the tube for the above case?
|
Temp.
(°C)
|
Density
(kg/m3)
|
Sp.heat
(kJ/kg-K)
|
Thermal Conductivity
´10–2 (W/m-K)
|
viscosity´102
(kg/hr)
|
Pr
|
v´106
(m2/s)
|
|
10
20
30
|
1000
1000
1000
|
4.192
4.183
4.174
|
57.498
59.780
61.345
|
496
361.892
288.650
|
9.52
7.02
5.42
|
1.306
1.006
0.805
|