Question

udent Name ID 4. The design data for a pipe at the outlet of an oil-field steam generator are as follows: • Pipe size and schedule: 3 NPS, Sch 160, carbon steel, ID = 66.6 mm Total steam mass flow: 27,800 kg/h Steam quality: 70% Steam Pressure = 13,700 kPag = 2000 psia Barometric pressure = 90 kPa Density: liquid = 624 kg/m3, vapour = 85.2 kg/m3 Viscosity: liquid = 0.091 mPa.s, vapour = 0.025 mPa.s (Note: 1 mPa.s = 1 cP) Pipe straight length = 10 m Pipe surface roughness factor $\epsilon$ = 0.046 mm Calculate the pressure drop of the two-phase flow of 70% quality steam, in the above pipe, using the homogeneous model 2-phase frictional multiplier ($\phi_{f\phi2}$) method provided in this examination booklet. Add 20% design margin. Plot the f factor on the friction factors chart provided.

          udent Name
ID
4. The design data for a pipe at the outlet of an oil-field steam generator are as follows:
•
Pipe size and schedule: 3 NPS, Sch 160, carbon steel, ID = 66.6 mm
Total steam mass flow: 27,800 kg/h
Steam quality: 70%
Steam Pressure = 13,700 kPag = 2000 psia
Barometric pressure = 90 kPa
Density: liquid = 624 kg/m3, vapour = 85.2 kg/m3
Viscosity: liquid = 0.091 mPa.s, vapour = 0.025 mPa.s (Note: 1 mPa.s = 1 cP)
Pipe straight length = 10 m
Pipe surface roughness factor $\epsilon$ = 0.046 mm
Calculate the pressure drop of the two-phase flow of 70% quality steam, in the above pipe,
using the homogeneous model 2-phase frictional multiplier ($\phi_{f\phi2}$) method provided in this
examination booklet. Add 20% design margin.
Plot the f factor on the friction factors chart provided.

udent Name
ID
4. The design data for a pipe at the outlet of an oil-field steam generator are as follows:
•
Pipe size and schedule: 3 NPS, Sch 160, carbon steel, ID = 66.6 mm
Total steam mass flow: 27,800 kg/h
Steam quality: 70%
Steam Pressure = 13,700 kPag = 2000 psia
Barometric pressure = 90 kPa
Density: liquid = 624 kg/m3, vapour = 85.2 kg/m3
Viscosity: liquid = 0.091 mPa.s, vapour = 0.025 mPa.s (Note: 1 mPa.s = 1 cP)
Pipe straight length = 10 m
Pipe surface roughness factor ϵ = 0.046 mm
Calculate the pressure drop of the two-phase flow of 70% quality steam, in the above pipe,
using the homogeneous model 2-phase frictional multiplier (ϕfϕ2) method provided in this
examination booklet. Add 20% design margin.
Plot the f factor on the friction factors chart provided.

Added by Domingo E.

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