BVB C00 MBX00 1090 Rev A_Calculation GT Services

7/29/2019 BVB C00 MBX00 1090 Rev A_Calculation GT Services

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REV A

CALCULATION - GT SERVICES PIPE SIZING

3. REFERENCE

4. ATTACHMENT

5. COMPUTATION

6. RESULT & CONCLUSION

PP-9, STAGE-II C & D, EXTENSION PROJECTBVE-C00-MBX00-1090

PP-9, STAGE-II C & D, EXTENSION PROJECT


TABLE OF CONTENTS

TABLE OF CONTENT

1. PURPOSE

2. DESIGN BASIS & ASSUMPTION


2/8

1.1

1.2

1.3

a) For Wash Water interconnecting piping

2.1

2.2

2.3

2.4

2.5

2.62.7

2.8

2.9

2.10

2.11

2.13

2.14

b) For Compressed Air piping

2.15 Per Reference-3.13, Maximum Air Velocity in the Pipe is considered as 25 M/s.

2.16 Per Reference-3.8, the flow from CA5 to AP1 shall be 75 SCFM.

2.17

3.1

3.2 P & ID- GT Services (BVF-C00-MBX00-1010)

3.3 Piping Layout - GT 25-26 Area (BTH-C11-00000-1167)

3.4

3.5 GE Drawing No.: 234B7521, Diagram Scheme PP - Turbine & Compressor (2 Sheets)

3.6 GE Drawing No.: 133E3667, Diagram Scheme PP - Turbine & Compressor Washing (Rev-A)(2 Sheets)

3.7

3.8

3.9

3.10

3.11

3.12

3.13 SEC Specification - Part-2, Vol-2, Section-4.8

4.1 Schematic Flow Diagram for GT Water Wash Interconnecting Piping

5.1 Calculation of pipe sizes and pressure drop for Wash Water interconnecting pipes

5.1.1

a = 0.998 Refer 2.4

b = 0.998 gm/c.c i.e. 62.303 lb/cu.ft

Sheet

2

Calculation of the Wash Water Pipe Sizes

Specific Gravity of water

Density of the water

PP-9, STAGE-II C & D, EXTENSION PROJECTBVE-C00-MBX00-1090 REV A


GE Drawing No.: 120E4246, Diagram Scheme PP - Air Processing Unit (Rev-B)(1 Pages)

Crane Hand Book

Nayyar Piping Hand Book

Cameron Hydraulic Data

4. ATTACHMENT

5. COMPUTATION

Stainless Steel Schedule 40S Pipe has been considered for compressed air pipes.

3. REFERENCE

General Arrangement Layout (Drg. No.: AB-SEC(COA)-PP9C&D-G-0300,Rev 2)

GE Drawing No.: 133E3455, Diagram Scheme PP - Water Wash (1 Sheets)

GE Drawing No.: 133E8993, Outline, GT Package Purchaser Connection Piping (Rev-B)(5 Pages).

GE Drawing No.: 133E3460, Diagram Scheme PP - CLG & SLG (Rev-A)(2 Pages)

Per Note 3 of Reference-3.5, Interconnecting Piping between Compressor Water Wash Inlet (WW 1), Turbine Water Wash Inlet (WW 2) and Wash Water Skid

Outlet (WW 20) shall be of Stainless Steel.

Schedule 40S Pipe is considered for Wash Water Pipe Line.

It is considered that either of the Turbine Water Wash or the Compressor Water Wash shall operate at a time in single GT i.e both will not operate simultaneously.

10% Margin has been considered on the Calculated Total Frictional Pressure Drop. This is to account for the uncertainity due to the uncertainty in actual Piping

Layout.

For other GT Services connections, the pipe sizes are considered same as the size of nozzle connections given in respective GE Drawings and are shown in

Reference-3.2.

Per Reference-3.12, Kinematic Viscosity of Water is considered as 1.06 cst at Minimum Wash Water Temperature (i.e. 18C).

Per Reference-3.12, Specific Gravity of Water is considered as 0.998 at Minimum Wash Water Temperature (i.e. 18C).

Per Note 3 of Reference-3.6, Interconnecting Piping Pressure Drop between Compressor Water Wash Inlet (WW 1), Turbine Water Wash Inlet (WW 2) and Wash

Water Skid Outlet (WW 20) shall be less than or equal to 10 PSID (i.e. 0.703 Kg/cm2 i.e. 0.689 Bar).

Per Reference-3.6, Maximum Flow Rate at Wash Water Skid Outlet Nozzle (WW 20) is 250 GPM (i.e. 946.3 LPM i.e. 56.78 M3/Hr.)

Per Reference-3.6, Maximum Flow Rate at Compressor Wash Water Skid Inlet Nozzle (WW 1) is 50 GPM (i.e. 189 LPM i.e. 11.356 M3/Hr.) and Turbine Wash

Water Skid Inlet Nozzle (WW 2) is 250 GPM (i.e. 946.3 LPM i.e. 56.78 M3/Hr.)

Per Reference-3.1, 3.2 & 3.3, Pipe Lengths, Fittings and Valves of various Sections are estimated.

b) Wash Water Skid Outlet Nozzle (WW20) to GT # 25 Turbine Water Wash Inlet Nozzle (WW2).

To Calculate the Total Frictional Pressure Drop in the GT Wash Water Interconnection Piping and to Check whether this Calculated Pressure Drop is within the

Specified Limit of Equipment Supplier.

To Check the velocity of Compressed Air Line From CA5 in Turbine Compartment to AP1 in Air Processing Unit.

2. DESIGN BASIS & ASSUMPTION

Per Reference-3.13, Maximum Allowable Water Velocity in the Pipe is considered as 2.5 M/s.

Per Note 11 of Reference-3.6, Minimum and Maximum Wash Water Temperatures are considered as 18C and 82C respectively.

1. PURPOSE

To Calculate the Size of GT Wash Water Interconnection Piping between

a) Wash Water Skid Outlet Nozzle (WW20) to GT # 25 Compressor Water Wash Inlet Nozzle (WW1).


3/8

5.1.1.0

5.1.1.1

a = 11.356 M3/hr Refer 5.1.1.0

= 24986 lb/hr

b = 2.5 M/s Refer 2.1

c = 0.001 M2

d = 40.074 mm

e = 150 mm

f = 168.30 mm

g = 7.110 mm

h = 154.080 mm i.e. 0.506 ft

i.e. 6.066 in

i = 0.169 M/s i.e. 0.555 ft/s i.e < 2.5 M/s

5.1.1.2

a = 11.356 M3/hr Refer 5.1.1.0

= 24986 lb/hr

b = 2.5 M/s Refer 2.1

c = 0.001 M2

d = 40.074 mm

e = 40 mm

f = 48.30 mm

g = 3.680 mm

h = 40.940 mm i.e. 0.134 ft

i.e. 1.612 in

i = 2.395 M/s i.e. 7.857 ft/s i.e < 2.5 M/s

5.1.1.3

a = 56.780 M3/hr Refer 5.1.1.0

= 124928 lb/hr

b = 2.5 M/s Refer 2.1

c = 0.006 M2

d = 89.607 mm

e = 150 mm

f = 168.30 mm

g = 7.110 mm

h = 154.080 mm i.e. 0.506 ft

i.e. 6.066 in

i = 0.846 M/s i.e. 2.773 ft/s i.e < 2.5 M/s

Sheet

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Thickness of the Pipe (t) (considering Sch. 40S Pipe)

Actual Pipe Inside Diameter

[ 5.1.1.3f - 2X5.1.1.3g ]

Actual Velocity of Water in the Pipe

[ 5.1.1.3a / (p (5.1.1.3h)^2)/4 ]

Minimum Flow Area required

[ 5.1.1.3a / 5.1.1.3b ]

Minimum Pipe Inside Diameter required

[ (5.1.1.3c X 4 / p )^0.5 ]

Pipe Size (NB)

Pipe Outside Diameter (OD)

[ 5.1.1.2a / (p (5.1.1.2h)^2)/4 ]

Section 2a

Check for Pipe Diameter

Flow Rate

Maximum recommended Water Velocity




[ 5.1.1.2f - 2X5.1.1.2g ]




[ 5.1.1.2a / 5.1.1.2b ]


[ (5.1.1.2c X 4 / p )^0.5 ]

Selected Pipe Size (NB)


[ 5.1.1.1a / (p (5.1.1.1h)^2)/4 ]

Section 1b

Calculation for Pipe Diameter

Flow Rate

Pipe Size (NB)




[ 5.1.1.1f - 2X5.1.1.1g ]



[ 5.1.1.1a / 5.1.1.1b ]


[ (5.1.1.1c X 4 / p )^0.5 ]

Section 2b Node-1 to WW 2 56.780

Section 1a

Check for Pipe Diameter

Flow Rate

Case 2 (Only

Turbine Cleaning)

Wash Water Skid Outlet Nozzle (WW 20) to GT#25 Turbine

Wash Water Inlet Nozzle (WW 2)

Section 2a WW 20 to Node-1 56.780

Section 1a WW 20 to Node-1 11.356

Section 1b Node-1 to WW 1 11.356

Entire Piping Network has been divided into a number of Sections as indicated in Table below :

Cases Description (Refer

4.1)

Design Flow (M3/Hr)

(Refer 2.6 & 2.7)

Case 1 (Only

Compressor

Cleaning)

Wash Water Skid Outlet Nozzle (WW 20) to GT#25 Compressor

Wash Water Inlet Nozzle (WW 1)


4/8

5.1.1.4

a = 56.780 M3/hr Refer 5.1.1.0

= 124928 lb/hr

b = 2.5 M/s Refer 2.1

c = 0.006 M2

d = 89.607 mm

e = 100 mm

f = 114.30 mm

g = 6.020 mm

h = 102.260 mm i.e. 0.335 ft

i.e. 4.026 in

i = 1.920 M/s i.e. 6.296 ft/s i.e < 2.5 M/s

5.1.2

5.1.3

Section 1b Section 1b Section 2a Section 2b

150 40 150 100

695.000 1.800 695.000 4.800

13 1 13 114 14 14 14

28.043 0.573 28.043 1.432

1 0 1 015 15 15 15

2.311 0.000 2.311 0.000

9 0 9 120 20 20 20

27.734 0.000 27.734 2.045

2 0 2 060 60 60 60

18.490 0.000 18.490 0.000

0 0 0 00 0 0 2.800

0.000 0.000 0.000 0.000

0 0 0 00 0 0 6.895

0.000 0.000 0.000 0.000

0 0 0 08 8 8 8

0.000 0.000 0.000 0.000

0 0 0 0

340 340 340 3400.000 0.000 0.000 0.000

771.578 2.373 771.578 8.277

Sheet

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L/D Ratio

Eqvt. Length (M)

Globe ValveL/D Ratio

Eqvt. Length (M)

Total Length (M)

K Value

Eqvt. Length (M)

ExpanderK Value

Eqvt. Length (M)Gate Valve

L/D Ratio

Eqvt. Length (M)Tee (Branch Flow)L/D Ratio

Eqvt. Length (M)Reducer

L/D Ratio

Eqvt. Length (M)45 Degree Elbow

L/D Ratio

Eqvt. Length (M)Tee (Straight Flow)

Sections

Items

Pipe Size (mm NB)Straight Pipe (M)

90 Degree Elbow

Section 2b From Node-1 to WW 2 100

Calculation of Total Equivalent Length of Pipes and Fittings

Total Equivalent Length of Pipes, Fittings and Valves are calculated as follows :

Cases Case 1 Case 2

Section 2 Wash Water Skid Outlet Nozzle (WW 20) to GT#25 Turbine Water

Wash Inlet Nozzle (WW 2)

Section 2a From WW 20 to Node-1 150

Section 1a From (WW 20) to Node 1 150

Section 1b From Node 1 to WW 1 40

Sections Description (Refer

Cl. No. 3.1)

Selected Pipe Size NB

(mm)

Section 1 Wash Water Skid Outlet Nozzle (WW 20) to GT#25 Compressor

Water Wash Inlet Nozzle (WW 1)


[ 5.1.1.4f - 2X5.1.1.4g ]


[ 5.1.1.4a / (p (5.1.1.4h)^2)/4 ]

Selection of Pipe Size

Selected Pipe Sizes (on the basis of calculation of 5.1.1.1 to 5.1.1.5) and Line Numbering for all the Sections are listed in Table below :


[ (5.1.1.4c X 4 / p )^0.5 ]




Calculation for Pipe Diameter

Flow Rate



[ 5.1.1.4a / 5.1.1.4b ]

Section 2b


5/8

5.1.4

5.1.4.1

Pressure Drop = r X f X L X v2

144 X D X 2g

where, r = density in lb/cu.ft

f = friction factor

L = Equivalent length of pipe in ft.

v = mean velocity of flow in ft/sec

D = internal diameter of pipe in ft

g = acceleration due to gravity, 32.2 ft/s2

a = 1.060 cst Refer 2.3

= 1.058 cp

b = 6.31 X rate of flow in lb/hr Refer 3.10internal dia in inch X viscosity in centipoise

= 24568

c Refer 3.10

= 0.027

Putting the following values in equation,

r = 0.998 gm/cc i.e. 62.303 lb/cu.ft

f = 0.027

L = 771.578 M i.e. 2530.775 ft Refer 5.1.3

v = 0.555 ft/s

D = 0.506 ft

g = 32.200 ft/s2

d = 0.279 PSI

e = 0.197 MWC

= 0.019 Bar

5.1.4.2


144 X D X 2g


f = friction factorL = Equivalent length of pipe in ft.




a = 1.060 cst Refer 2.3

[ 5.1.4.2a X 5.1.1b ] = 1.058 cp

b = 6.31 X rate of flow in lb/hr Refer 3.10

internal dia in inch X viscosity in centipoise

= 92463

c Refer 3.10

= 0.023Putting the following values in equation,

r = 0.998 gm/cc i.e. 62.303 lb/cu.ft

f = 0.023

L = 2.373 M i.e. 7.784 ft Refer 5.1.3

v = 7.857 ft/s

D = 0.134 ft

g = 32.200 ft/s2

d = 0.553 PSI

e = 0.389 MWC

= 0.038 Bar

Sheet

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[ 5.1.4.2d / 5.1.1b ]


BVE-C00-MBX00-1090 REV ACALCULATION - GT SERVICES PIPE SIZING

Viscosity of Water

Reynolds Number

From Reynolds No. vs Friction Factor chart in page 3-9 of CRANE Handbook

Friction Factor of the Pipe for Water flow

Pressure Drop in this Section

Head Loss in this Section




[ 5.1.4.1d / 5.1.1b ]

Section 1b

As per D'arcy formula Pressure Drop in psig is given by

Section 1a


Viscosity of Water

[ 5.1.4.1a X 5.1.1b ]

Reynolds Number


Calculation of Frictional Pressure Drop at various Sections of Piping


6/8

5.1.4.3


144 X D X 2gwhere, r = density in lb/cu.ft

f = friction factor





a = 1.060 cst Refer 2.3

[ 5.1.4.3a X 5.1.1b ] = 1.058 cp



= 122840

c Refer 3.10

= 0.0195


r = 0.998 gm/cc i.e. 62.303 lb/cu.ft

f = 0.020

L = 771.578 M i.e. 2530.775 ft Refer 5.1.3

v = 2.773 ft/s

D = 0.506 ft

g = 32.200 ft/s2

d = 5.045 PSI

e = 3.554 MWC

= 0.348 Bar

5.1.4.4


144 X D X 2g


f = friction factor





a = 1.060 cst Refer 2.3

[ 5.1.4.4a X 5.1.1b ] = 1.058 cp



= 185089

c Refer 3.10

= 0.019


r = 0.998 gm/cc i.e. 62.303 lb/cu.ft

f = 0.019

L = 8.277 M i.e. 27.148 ft Refer 5.1.3

v = 6.296 ft/sD = 0.335 ft

g = 32.200 ft/s2

d = 0.409 PSI

e = 0.288 MWC

= 0.028 Bar

5.2 Calculation of velocity in line from CA5 in Turbine Compartment to AP1 in Air Processing Unita = 75.000 SCFM Refer 2.16

a.1 Normal Pressure = 12.000 barg Refer 3.8

a.2 Design Temperature = 387.000 deg C Refer 3.8

a.3 Flow at above pressure & temp. = 23.690 M3/hr

b = 25.0 M/s Refer 2.15

c = 0.0003 M2

d = 18.303 mm

e = 25 mm

f = 33.40 mm

g = 3.380 mm

h = 26.640 mm i.e. 0.087 ft

i.e. 1.049 in

i = 11.801 M/s i.e. 38.708 ft/s i.e < 25 M/s

Sheet

Actual Velocity of air in the Pipe

[ 5.2a / (p (5.2h)^2)/4 ]






[ 5.2f - 2X5.2g ]

Flow Rate

Maximum recommended Compressed Air Velocity


[ 5.2a / 5.2b ]


[ (5.2c X 4 / p )^0.5 ]

Reynolds Number





[ 5.1.4.4d / 5.1.1b ]



[ 5.1.4.3d / 5.1.1b ]

Section 2b


Viscosity of Water

Section 2a


Viscosity of Water

Reynolds Number




7/8

6BVE-C00-MBX00-1090 REV A



8/8

6

6.1 RESULTS

a) For Wash Water Interconnecting Piping

Selected

Pipe Size

(mm NB)

Recommend

ed Maximum

Velocity

(M/s)

Calculated

Velocity

(M/s)

Calculated

Frictional

Pressure

Drop in

each

Section

(Bar)

Calculated

Total

Frictional

Pressure

Drop in

entire

Piping

(Bar)

Total

Frictional

Pressure

Drop with

Margin as

per 2.13

(Bar)

GE

Recommen

ded

Maximum

Pressure

Drop as per

2.5 (Bar)

150 2.5 0.169 0.019

40 2.5 2.395 0.038

150 2.5 0.846 0.348100 2.5 1.920 0.028

b) For Compressed Air Piping from CA5 in Turbine Compartment to AP1 in Air Processing Unit

Selected

Pipe Size

(mm NB)

Calculated

Velocity

(M/s)

25 11.80

6.2 CONCLUSIONS

a)

b)

c) In Compressed Air System, the calculated velocity is 11.8 m/s meets the velocity criterion.

Sheet

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From CA5 to AP1 25 from GT to APU

The Selected Pipe Sizes for the Wash Water system are in order with respect to Velocity Criteria and are listed in Cl. No. 6.1

Based on the Results in 6.1, the Calculated Total Maximum Frictional Pressure Drop in the entire Wash Water Interconnection Piping between Wash Water Skid

and GT#25 Accessory Base is 0.414 Bar and this is less than the Recommended Total Pressure Drop of 0.689 Bar in the Interconnection Piping. This does notinclude Static Level Difference between the Wash Water Skid Outlet Nozzle (WW 20) and either of the Compressor Water Wash Intlet Nozzle (WW 1) or the

Turbine Water Wash Inlet Nozzle (WW 2).



0.414Section 2aSection 2b

Sections Recommended Maximum

Velocity (M/s)

Remarks

RESULTS & CONCLUSION

Sections

Case 1

0.057 0.063

0.689

Section 1a

Section 1b

Case 2

0.376

BVB C00 MBX00 1090 Rev A_Calculation GT Services

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