Acc-tza

Flexibility Analysis for The Turbine Exhaust Steam Duct of the ACC Unit 2 (valid also for Unit1) Haruvit Combined Cycle Power Plant

Purchaser: DALIA POWER ENERGIES Ltd.

Contractors: ALSTOM Israel Ltd. ALSTOM Switzerland Ltd.

Project: HARUVIT Combined Cycle Power Plant

Contract No. EPC Contract Haruvit

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O. Van Roye O. Van Roye O. Van Roye

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Flexibility Analysis for The Turbine Exhaust Steam Duct of the ACC Unit 2 (valid also for Unit1)

WB1-101-000418_DNO4110 D0151815_B Rev.

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Contract Name Contract Number Document Title

: TZAFIT : WB1-101-000418 : FLEXIBILITY ANALYSIS FOR THE EXHAUST STEAM DUCT OF THE ACC

AIR COOLED CONDENSER

FLEXIBILITY ANALYSIS FOR THE EXHAUST STEAM DUCT OF THE ACC UNIT 2 (valid also for Unit 1)

SPX Ref. Nr. : WB1-101-000418_DNO4110 RB Doc. Nr. : D0151815_B.doc

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15/01/2013 29/04/2012 14/02/2012 Date

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CTD PREL PREL Status

Remarks  SPX Cooling Technologies

Statistical Commodity No.:

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: TZAFIT : WB1-101-000418 : FLEXIBILITY ANALYSIS FOR THE EXHAUST STEAM DUCT OF THE ACC

TABLE OF CONTENT page

1.

INTRODUCTION

4

2.

METHODOLOGY

4

3.

DESIGN BASIS

4

3.1.

DESIGN CONDITIONS

4

3.2.

LOADINGS

4

3.3.

EXPANSION BELLOWS

6

3.4.

SUPPORT TYPE AND LOCATION

7

3.5.

ANALYSIS PROGRAM

7

4.

CONCLUSIONS

7

5.

REFERENCES

7

ATTACHMENT A : ALGOR PIPEPLUS PLOTS

9

ATTACHMENT B : GROUND DUCT SUPPORT LOADS AND TURBINE NOZZLE LOADS

12

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1.

: TZAFIT : WB1-101-000418 : FLEXIBILITY ANALYSIS FOR THE EXHAUST STEAM DUCT OF THE ACC

INTRODUCTION The purpose of this calculation note is to analyse the flexibility of the exhaust steam duct of the Air Cooled Condenser (ACC), to establish the foundations loads and the loads on the connection of the steam duct with the turbine exhaust duct. REV.B: the support S6 is blocked in rotation about the axis Y.

2.

METHODOLOGY The analysis is done by means of a piping computer code (see 3.5 hereafter). The ducting model is based on the information given in the design basis (see 3 hereafter); the geometry reference is the plot plan given in ref 1. The output results (displacements, stresses and applied loads and moments) are thoroughly checked against client specification or design code criteria.

3.

DESIGN BASIS The exhaust steam duct from the turbine terminal point to the Air Cooled Condenser is shown schematically with its main dimensions in attachment A, the reference drawing is the plot plan in ref 1. 3.1 Design conditions: Design pressure: Full vacuum / 0.49 barg Design Temperature: 120 °C Corrosion allowance: 1 mm Insulation: a thermal insulation 30 mm rockwool (120 kg/m³) + 1 sheet 1 mm galvanized steel jacket) on the main ground duct inside the turbine building is taken into account in this analysis. Code check: ANSI B31.1 Edition 2007 The material is S235 JR or equivalent with an allowable tensile stress of 104 MPa. This document contains the flexibility analysis for the exhaust steam duct for the above mentioned design conditions and the following loading conditions. 3.2 Loadings: 3.2.1 Pressure: Full vacuum 3.2.2 Thermal: Maximum operating temperature: 120 °C. Assumed erection temperature: 20°C. (considered as to be more conservative than the design ambient temperature is 27° because the delta T is the base of the calculation) Assumed thermal displacement of the turbine exhaust device nozzle: Following turbine nozzle displacements have been taken into account according document in reference [5] and in SPX axis convention : Delta X = 0 mm Rev A Delta Y = 0.4 mm Delta Z = 0 mm

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3.2.3 Wind: The wind load case definition has been established in the steel structure calculation note (reference: SPX document DNO2000 rev D). We use a Cp value of 0.9 for the duct. The wind pressure values are given hereafter (computed with a Cp=1 but factored to 0.9 in the duct model) :

3.2.5 Earthquake: The seismic load case definition has been established in the steel structure calculation note (reference [ 3 ]: SPX document DNO2000 rev D): Conservatively we have considered the peak accelerations given in figure 5-3 and 5-6 of document reference 4: Alstom document 1AHA0926277 rev C : Horizontal and vertical design spectrum according to SI 413 for low ductility, K = 2. 033 g for both horizontal directions and 0.22 g for the vertical direction These accelerations have been applied in a pseudo static analysis.

3.2.6 Snow: Not applicable

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3.2.7 Bypass lines:

For the LP bypass nozzle (assumed to be 16”) we considered : Fx = 3.4 kN Fy = 12.1 kN Fz =- 3.2 kN

Rev A

Mx = 7.9 kNm My = 4.4 kNm Mz = 13.8 kNm Significant displacements of the LP nozzle (mm) : DW: dz = -2.4 mm TH: dx = 3.531 dy=9.117 dz=2.878 Seism x : dx=0.899 dy=-0.092 dz=-0.563 BYpass case: dx=0.288 dy=0.070 dz=-0.461 For the HRH (IP) bypass nozzle (assumed to be 48”) we considered : Fx = 36.3 kN Fy = 16.1 kN Fz = -25.3 kN Mx = 13.6 kNm My = 139.2 kNm Mz = 116.8 kNm Significant displacements of the IP nozzle (mm): DW: dz = -1.2mm TH: dx= 3.499 dy=4.534 dz=2.90 Seism x : dx=.727 dy=-0.147 dz=-0.608 Bypass case: dx=0.360 dy=0.075 dz=-0.501

3.3 Expansion bellows:  Ground duct One lateral expansion joint with tie rods (in client scope) is installed at the turbine exhaust nozzle. The lateral stiffness is assumed to be 3000 N/mm. The rotational stiffness is assumed to be 5000 Nm/° (to be confirmed by Alstom). Rev A 

Risers

For each street, the riser is equipped with one lateral type bellow and one hinge type bellow is foreseen downstream the upper riser elbow. The lateral expansion joint has a maximum free rotational stiffness of 16000 Nm/° per bellow and a maximum free lateral stiffness of 180 N/mm. The axial stiffness is considered as fully rigid. The length of the lateral bellows is 5 m (weight = 4500 kg maximum). The hinge bellow has a maximum rotational stiffness of 16000 Nm/° and maximum weight 2500 kg. Originator

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3.4 Support type and location:

See attachement A :    

Support S2, S3, S4, and S5 are BFB-FFF (*). Rev B Support S6 is BFB-FBF. Support S1 is BFB-FBF The supports on the top steam manifold are sliding supports (FBB-BFF), except the last one which is fixed (BBB-BFF). The supports situated on the second part of the ACC are also sliding supports. They are not modeled in the flexibility analysis because the don’t have any impact on the turbine nozzle loads, nor on the ground duct foundation loads.

(*) legend for supports : F = Free, B = Blocked. The first 3 items are the displacements in direction X,Y,Z. The last 3 items are the rotations around axis X,Y,Z

3.5 Analysis program : ALGOR PIPEPLUS version 23.01.00.0136

4.

CONCLUSIONS The exhaust steam duct is satisfactory for the design conditions as specified on the previous pages. The complete input and output results of the analysis are available on request. The stress levels are well below the allowable of the selected duct material. The axial force (Fy) is slightly exceeding the allowable load on the turbine nozzle during high wind conditions, see attachment B.

5.

REFERENCES [1]

DWG 0001 General arrangement preliminary status

[2]

ALGOR Model Id: tzafit

[3]

DNO 2000 rev D :” structural steel calculations”

[4]

ALSTOM document 1AHA096277 rev C:” Seismic Design of Civil Structures”

[5]

ALSTOM document 1BSE502852 rev _:” Pipe actions”

RB

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Attachments A

ALGOR Pipeplus plots

B

Ground duct supports loads and turbine nozzle loads

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ATTACHMENT A Model plots

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ATTACHMENT B (rev B) Ground duct supports loads and ACC Ducting to Turbine connection nozzle loads

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Duct Support Foundation Loads Point Name

Forces ( KN ) X

Y

Moments ( KN-m ) Z

X

Y

Z

Load : Dead Weight 1 0 0 0 0 0

S1 S2 S3 S4 S5 S6

-1389 -317 -566 -461 -359 -535

29

1

Load : Pressure (full vacuum) 1 0 29 0 1 0 0 0 1 0 -1 0 0 Forces ( KN ) Moments ( KN-m )

S1 S2 S3 S4 S5 S6 Point Name

X

Y

Z

X

Y

REV B

Z

Load : Thermal + Friction S1 S2 S3 S4 S5 S6

-26 1 -8 -14 -1 5

S1 S2 S3 S4 S5 S6

523 31 147 150 51 148

-13 -32 -17 -31 8 -16

-1022

-29

Load : Seismic X -11 -13 -18 -20 -28 0

6682

552

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Contract Name Contract Number Document Title

Point Name

: TZAFIT : WB1-101-000418 : FLEXIBILITY ANALYSIS FOR THE EXHAUST STEAM DUCT OF THE ACC Forces ( KN ) X

Y

Moments ( KN-m ) Z

X

Y

Z

Load : Seismic Y -1 0 0 0 2 0

S1 S2 S3 S4 S5 S6

82 -16 -21 64 -115 8

21

0

Load : Seismic Z S1 S2 S3 S4 S5 S6 Point Name

0 0 0 0 0 Forces ( KN ) X

Y

306 70 125 101 79 118

Rev B (whole page)

-7

Moments ( KN-m ) Z

X

Y

Z

Load : Wind X S1 S2 S3 S4 S5 S6

424 52 159 189 73 -6

-15 -18 -24 -28 -39 0

8383

304

Load : Wind Y S1 S2 S3 S4 S5 S6 Point Name

-1 110 29 0 -22 1 -33 -1 92 2 -164 -1 18 0 Forces ( KN ) Moments ( KN-m ) X

Y

Z

X

Y

Z

Load : By pass load S1 S2 S3 S4 S5 S6

-6 2 0 0 0 51

-6 3 0 0 0 -31

23

407

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ACC Ducting to Turbine connection nozzle loads (metric units) Reference model:

Palm Beach Fx (N)

Deadweight

Fy (N)

Fz (N)

Mx (Nm)

My (Nm)

Mz (Nm)

0 0 - 12 38 1 - 77 1 0 22

-2 721 0 -30 299 - 134 478 006 - 101 893 398 599 28 202 302 000

487 -1 309 8 711 0 - 38 0 - 35 - 107 9

- 67 - 385 433 0 5 0 5 15 -1

0 0 -5 42 0 46 0 0 45

0 0 -1 3 0 - 15 0 0 0

0 - 12

299 279 -335 020

9 198 - 822

366 - 452

0 -5

0 -1

b. during by pass operation Combi max.: 22 Combi min.: - 34 210 000 Allowable : see note 4

327 481 -363 222 500 000

9 207 - 831 210 000

367 - 453 35 000

45 - 50 10 000

0 -1 170 000

pressure (full vacuum) Thermal ( at design T)

Wind X Wind Y Seismic X Seismic Y Seismic Z By pass loads Friction COMBINATIONS a. in normal operation Combi max.: Combi min.:

Rev B : whole page

- Combi max = DW + MAX (0,thermal) + MAX (0,pressure) + ABS (friction) + ABS (By pass)

- Combi min = DW + MIN (0,thermal) + MIN (0,pressure) - ABS (friction) - ABS (By pass)

With : ABS = absolute value MAX = maximum value MIN = minimum value SRSS = square root of the sum of the squares DW = deadweight loading case Seis x = seismic loading case in the X direction. c. with high wind condition Combi max.: 60 Combi min.: - 72 210 000 Allowable : see note 4

503 487 -539 228 500 000

9 245 - 869 210 000

372 - 458 35 000

87 - 92 10 000

3 -4 170 000

d. during a seismic event Combi max.: 99 Combi min.: - 111

918 879 -954 620

9 320 - 944

383 - 469

91 - 96

15 - 16

210 000

1000 000

210 000

35 000

10 000

170 000

Allowable : see note 4

The loading combinations minimum and maximum are based on the following assumptions : - The seismic, by pass, friction, settlement and wind loading cases are reversible. - Combi max = DW + MAX (0,thermal) + MAX (0,pressure) + ABS (friction) + ABS (settlement) + ABS (By pass) + MAX (ABS(Wind x),ABS (Wind y)) or MAX (SRSS (seis x, seis y,seis z)) - Combi min = DW + MIN (0,thermal) + MIN (0,pressure) - ABS (friction) - ABS (settlement) - ABS (By pass) - MAX (ABS(Wind X), ABS(Wind y)) or MAX (SRSS (seis x, seis y,seis z))

Notes: The loading combinations minimum and maximum are based on the following assumptions: 1. the seismic, by-pass, friction and wind loading cases are reversible. 2. The friction load reaction is based on the polish stainless steel plate against Teflon technique for the sliding supports (friction coefficient around 10%). 3. the friction load is not combined with the seismic/wind loadings. 4. allowables according to Alstom document in reference [ 5 ] The friction load reaction is based on the polish stainless steel plate against Teflon technique for 5. All the values given in this table are in the standard SPX System (Xspx = -Yalstom ; Yspx = Xalstom ; Zspx = Zalstom )

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