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Approved I

22 Dec 2016

For Approval

J.M PARK

B.H LEE

J.T BAIK

H G

10 Dec 2016

For Approval

J.M PARK

B.H LEE

J.T BAIK

12 Oct 2016

For Approval

J.M PARK

B.H LEE

J.T BAIK

F

07 Sep 2016

For Approval

J.M PARK

B.H LEE

J.T BAIK

E

19 Aug 2016

For Approval

J.M PARK

B.H LEE

J.T BAIK

REV

DATE

DESCRIPTION

DSGN

CHKD

APPD

PROJECT TITLE :

SARULLA GEOTHERMAL POWER PROJECT OWNER :

CONTRACTOR :

DESIGNED BY

DATE

J.M PARK

22 Dec 2016

CHECKED BY

DATE

B.H LEE

22 Dec 2016

APPROVED BY

DATE

DOCUMENT NUMBER

REV

J.T BAIK

22 Dec 2016

7-087-X19-00112

I

TITLE :

Performance Test Procedure for Steam Turbine

SARULLA GEOTHERMAL POWER PROJECT

Performance Test Procedure Steam Turbinet

Contents 1.

Purpose……………………………………………………………………………….

1

2.

Reference Data………………………………………………………………………

1

3.

Applicable Codes and Steam Tables………………………………………………

1

3.1

Applicable Test Codes………………………………………………………………

1

3.2

Applicable Steam Tables……………………………………………………………

2

4.

Target Items…………………………………………………………………………..

2

5.

Test Conditions……………………………………………………………………….

2

5.1

Operating Condition…………………………………………………………………

2

5.2

Cycle Isolation………………………………………………………………………..

2

5.3

Permissible Deviations of Variables……………………………………………….

3

5.4

Turbine Condition……………………………………………………………………

4

6.

Schedule of Testing………………………………………………………………….

5

6.1

Stability Check……………………………………………………………………….

5

6.2

Preliminary Test………………………………………………………………………

5

6.3

Test Duration…………………………………………………………………………

5

6.4

Sampling Test………………………………………………………………………..

6

6.5

Number of Test Runs………………………………………………………………..

6

7.

Instrumentation………………………………………………………………………

6

7.1

Calibration…………………………………………………………………………….

6

7.2

Time Adjustment……………………………………………………………………..

6

7.3

Number of Readings………………………………………………………………...

6

8.

Division of work………………………………………………………………………

7

8.1

Instrument Calibration……………………………………………………………….

7

8.2

Calculation of Uncertainty…………………………………………………………..

7

8.3

Temporary Instrument Installation………………………………………………….

7

8.4

Data Collection……………………………………………………………………….

7

8.5

Calculation of Test Result…………………………………………………………..

8

9.

Calculation of Test Result…………………………………………………………..

8

9.1

Operation Parameters……………………………………………………………….

8

9.2.

Correction of Gross Output…………………………………………………………

9

10.

Evaluation of Test Result…………………………………………………………… 10

10.1 Indication Validity……………………………………………………………………. 10 10.2 Retest………………………………………………………………………………… 10 11.

Report………………………………………………………………………………… 10

i

SARULLA GEOTHERMAL POWER PROJECT

Performance Test Procedure Steam Turbinet

Appendixces 1. Measuring Points / Isolation Valves 2. Measuring Instrument List 3. STG Performance Test Manual Recording Data Sheet 4. Uncertainty Analysis

References 1. Heat Balance Diagram

4GMI00233 Rev.6

(Target Point) 2. Correction Curves

LST-GMH-XISLI-0002 Rev.4

3. Degradation Curve for interim Operation

LST-GMH-XISLI-003 Rev.0

ii

SARULLA GEOTHERMAL POWER PROJECT

1

Performance Test Procedure Steam Turbine

Purpose This document describes the procedure for measuring STG performance for Sarulla Geothermal Power Plant SIL #1 located in Indonesia. The purpose of this test is to confirm that the STG performance values measured under the Target Point condition satisfy the target items between HDEC / Toshiba, which are described in Clause 4. Each Component Unit shall be tested for a period of two (2) hours in order to demonstrate that each Component Unit can operate safely close to the design range and to demonstrate the performance and correct operation of its equipment (the "Component Unit Test").

2

Reference Data The latest revision at the time of testing of the following documents shall be applied. (1) Heat Balance Diagram (Reference 1) •

Target Point with Gross Output at Generator Terminals of 62,850 kW

(2) Correction curves (Reference 2) for SIL •

Correction factor for Main Steam Flow



Correction factor for Main Steam Pressure



Correction factor for Exhaust Pressure



Correction factor for NCG content



Correction factor for Generator Power Factor

(3) Uncertainty Analysis (to be prepared and carried out by HDEC)

3

Applicable Codes and Steam Tables

3.1

Applicable Test Codes The performance test shall be carried out in accordance with ASME Performance Test Code 6 unless otherwise specified. The revision of applied code shall be the latest one available at the date of contract (i.e. ASME PTC6-2004 –reaffirmed 2014). As a practical test guideline for the steam turbine generator, ASME PTC 1, 2 and 19 series are also to be referred to when necessary.

1

SARULLA GEOTHERMAL POWER PROJECT

3.2

Performance Test Procedure Steam Turbine

Applicable Steam Tables Proper steam tables for steam properties equivalent to IAPWS-IF97 shall be used (i.e. ASME1997, JSME1999).

4

Targeted Items When the Steam Turbine Generator unit is operating under the specified condition given in "Clauses Test Conditions," the Gross Output at Generator Terminals shall be target. Gross Output at Generator Terminals

62,850 kW

For the confirmation of Gross Output at Generator Terminals, operation parameters shall be measured in accordance with "Clause 7 Instrumentation" the result shall be corrected in accordance with "Clause9 Calculation of Test Result" and the corrected result shall be judged as per "Clause 10 Evaluation of Test Result".

5

Test Conditions

5.1

Operating Condition Targeted STG performance is based on the interface conditions at Target Point Condition, and is based on the operating condition specified in the heat balance diagram of Reference 1. The following are the key parameters of the operating condition Inlet Pressure (at strainer inlet)

19.5 bara

Inlet Temperature

210.5 ℃

CV Valve Position

Wide Open

Dryness

99.98 %

Non-condensable gas content

2.7 wt%

Outlet Pressure

1.30 bara

Steam to Turbine

579,000 kg/h

Gross Output at Generator Terminals Generator Power Factor

5.2

62,850 kW 0.85 lagging

Cycle Isolation As the cycle isolation affects the accuracy of test results, extraneous flows shall be isolated from the system. If there is any doubt about the ability to isolate extraneous

2

SARULLA GEOTHERMAL POWER PROJECT

Performance Test Procedure Steam Turbine

flows during the test, preparations shall be made prior to the test to measure these flows. The flows to be isolated are listed below. The valves listed in Table 1 shall be isolated.



Blow off lines



Drain lines on steam strainers, stop valves, control valves, etc.



Other specified items Table1 Isolation Valve List (STG Portion)

Equipment No.

Valve Name / Tag No

Test Position

Normal Position

087-G-5308

Drain Valve of Main Steam Strainer (L)

Closed

Open

087-G-5311

Drain Valve of Main Steam Strainer (R)

Closed

Open

087-G-5309

Drain Valve after MSV(L)

Closed

Open

087-G-5312

Drain Valve after MSV(R)

Closed

Open

087-G-5323

Drain Valve after CV(L)

Closed

Open

087-G-5313

Drain Valve after CV(L)

Closed

Open

087-G-5332

Drain Valve at Exhaust

Closed

Closed

5.3

Permissible Deviations of Variables In order to avoid application of large correction factors to calculated test results, it is necessary that pressures and temperatures are close to the targeted Heat Balance values. During testing, operating parameters shall be kept within the limits indicated in Table 2. Table 2 Permissible Deviation of Variables Variable

Permissible Deviation for the Test Average from Rated Conditions (Note 1)

Permissible Fluctuations During any Test Run (Note 2)

a) Initial steam pressure

±3.0% of absolute pressure

±0.25% of absolute pressure or ±34.5kPa, whichever is larger

b) Main steam flow

Not specified

(Note 3)

c) Non-condensable gas content

±0.15% (Note 4)

3

-

SARULLA GEOTHERMAL POWER PROJECT

Performance Test Procedure Steam Turbine

d) Exhaust pressure (as Exhaust Flange)

±0.34kPa or ±2.5% of the absolute pressure, whichever is larger

±0.14kPa or ±1.0% of the absolute pressure, whichever is larger

e) Gross Output Generator output

±5.0%

±0.25%

f) Voltage

±5.0%

g) Power factor

Not specified

± 1. 0%

h) Turbine/Generator Speed

±5.0%

±0.25%

-

Notes: 1. In any event, the maximum allowable variations in pressure, temperature and speed are not to be exceeded, unless specifically agreed among test parties. 2. Fluctuations would be indicated by scatter in the data. 3. Flow measurements shall not be undertaken unless the flow is steady or fluctuates only slightly with time. The permissible fluctuation is ±1.0 percent of the differential pressure for fluctuations with a frequency greater than twice the frequency of successive readings and ±4.0 percent for smaller frequencies. 4. If it is not practical to operate the turbine within the stated range of noncondensable gas concentration, the test may be conducted at a non-condensable gas concentration that is agreed to by all parties.

5.4

Turbine Condition Gross Output at Generator Terminals is targeted under the condition that the inner parts of turbine such as nozzles and turbine blades are in new and clean conditions, without any deposits or damages.

4

SARULLA GEOTHERMAL POWER PROJECT

6

Schedule of Testing

6.1

Stability Check

Performance Test Procedure Steam Turbine

For the duration of the test, the unit must be in steady state conditions with flows, pressures and temperatures inside the permissible levels of deviations. For this reason, it is necessary to establish the test conditions for at least one hour prior to the start of Preliminary Test reading and Official Test reading. The Test schedule is shown in Figure 1.

Figure 1 Typical Test Schedule

6.2

Preliminary Test and Official Test Preliminary test shall be carried out on one day before official test run, for the purpose of confirming cycle isolation, checking all instruments and training personnel.

6.3

Test Duration Official Performance Test and Preliminary Test will be carried out separately for the duration of two hours. This does not include one hour pre-measuring to check stability and one hour reserve data reading after the official test. The timing of the Test will be agreed between all parties involved in the Test.

5

SARULLA GEOTHERMAL POWER PROJECT

6.4

Performance Test Procedure Steam Turbine

Number of Test Runs One preliminary test run and one official test run, under the specified operating conditions shall be scheduled.

7

Instrumentation

7.1

Calibration All the Primary Instruments for performance confirmation shall be calibrated prior to testing, so that calibrations have not expired, and its reading are reliable within the known error.

7.2

Time Adjustment Prior to testing, all the clocks/watches of D-EHC, Data Logger and recording staff shall be adjusted to indicate the same value as CSC.

7.3

Number of Readings The required number of readings depends on the scattering of indicating values. Generator output and differential pressure on flow meters for Main Steam flow shall be recorded at one minute interval or more frequently if deemed necessary. Other measurements shall be made at appropriate intervals in accordance with Appendix 2. Average of reading for two hours is to be utilized for calculation, unless otherwise specified.

6

SARULLA GEOTHERMAL POWER PROJECT

8

Division of work

8.1

Instrument Calibration

Performance Test Procedure Steam Turbine

As all temporary instruments will be shipped to the site prior to the Test, the calibration of these instruments will be carried out by international certified laboratory, which is nominated by HDEC and/or their subcontractor. All instrumentation will have valid calibration certificates and will be inside the calibration dates for the testing period. For permanent instruments, as their calibration may expire before the Tests, its calibration shall be carried out by the instrument supplier. Calibration Certificates shall be shared within HDEC and Toshiba, and is to be attached to Performance Test Report. 8.2

Calculation of Uncertainty The party in charge of instrument supply or calibration shall provide uncertainty data sheet or calibration certificate. In case several instruments are applied to derive single value, such as Main Steam Flow, its calculation formula and uncertainty shall be described, so that validity can be confirmed. Based on the uncertainty data and calculation formula for instruments, HDEC will prepare Uncertainty Analysis for Gross Output. Analysis result will be submitted to Toshiba for review

8.3

Temporary Instrument Installation HDEC is to dispatch instruments TA specialized for the supplied temporary instruments. All temporary instruments will be installed and removed by HDEC.

8.4

Data Collection Digitally recorded operation data shall be collected by the party indicated below. Collected data shall be shared within HDEC / Toshiba, as soon as practical after collection. Parameter

Measuring Interval

Prepared by

D-EHC

every 1 min, or more frequently

: HDEC

Data Logger

every 1 min, or more frequently

: HDEC

CSC

every 1 min, or more frequently

: HDEC

Digitally collected data shall include the time data of every one minute. Data will be

7

SARULLA GEOTHERMAL POWER PROJECT

Performance Test Procedure Steam Turbine

included the non-engineering unit signals and engineering unit values. For manually collected data, both HDEC & Toshiba shall witness and sign on the recorded sheets. For digitally collected data, both HDEC & Toshiba shall sign on the printed out record. 8.5

Calculation of Test Result HDEC will calculate the Main Steam flow rate from dPT and inform Toshiba of the result. Based on the operation data and Main Steam flow rate & NCG content HDEC will calculate Corrected Gross Output at generator terminals as per "Clause 9 Calculation of Test Result." All data for calculation of result will be submitted to Toshiba for review.

9

Calculation of Test Result

9.1

Operation Parameters (1) Main Steam Flow Steam flow rate to the steam turbine will be calculated in accordance with ASME PTC 19.5 using the data of differential pressure, static pressure and temperature to be measured at permanently installed station flow element, the calibrated venturi meter, located in the steam line immediately upstream of the main stop valves and downstream of the steam purifier. (2) Partial Pressure of Main Steam Following measured values are to be utilized for partial pressure calculation. 𝑃𝑚𝑎𝑖𝑛 : Pressure of Main Steam Line (barA) 𝑇𝑚𝑎𝑖𝑛 : Temperature of Main Steam Line (K) 𝛼𝑔𝑎𝑠 : Content of NCG

in Main Steam Line (wt%)

Calculation process is as follows. Molarity of water in Main Steam (mol%) is derived as follows.

𝛾𝑤𝑎𝑡𝑒𝑟

∝𝑔𝑎𝑠 (1 − ( 100 ) ÷ 18.02) = ∝𝑔𝑎𝑠 ∝𝑔𝑎𝑠 (1 − ( 100 ) ÷ 18.02) + ( 100 ÷ 44.01)

Partial pressure of Main Steam without NCG (barA) is calculated as follows.

8

SARULLA GEOTHERMAL POWER PROJECT

Performance Test Procedure Steam Turbine

𝑃𝑚𝑎𝑖𝑛𝑠𝑡𝑒𝑎𝑚 = 𝑃𝑚𝑎𝑖𝑛 𝑋 𝛾𝑤𝑎𝑡𝑒𝑟 Saturated steam temperature based on Main Steam partial pressure 𝑇𝑠𝑎𝑡𝑢𝑟𝑎𝑡𝑒 (K) is to be derived from Steam Table, based on 𝑃𝑚𝑎𝑖𝑛𝑠𝑡𝑒𝑎𝑚 Note: If the NCG molecular weight appears to be different from the above value (44.01), above formula shall be corrected. 9.2

Correction of Gross Output The measured Gross Output shall be corrected as follows OUTcoyy

=

OUTt / COUT

OUTcoyy

: Output corrected to rated operating conditions

OUTt

: Output measured during performance test.

COUT

: Total Correction factor for Output correction

The total correction factor shall be obtained as COUT = (1+CFflow/100) x (1+CFip/100) x (1+CFexh/100) x (1+CFncg/100) x (1+CFpf/100) where CFflow

: Correction factor for main steam flow = (measured steam flow / expected steam flow)

CFip

: Correction factor for main steam pressure

CFexh

: Correction factor for exhaust pressure

CFncg

: Correction factor for NCG content

CFpf

: Correction factor for power factor

Note : Correction factors CFip must be applied in conjunction with the correction factor for main steam flow to the turbine, CFflow.

9

SARULLA GEOTHERMAL POWER PROJECT

10

Performance Test Procedure Steam Turbine

Evaluation of Test Result

10.1 Indication Validity When there is any abnormality observed in measurement, its indication validity will be cross-checked with secondary measurements. At the same time, instrument installation shall be confirmed for its integrity. 10.2 Retest After finishing the test, HDEC will report the preliminary results of the Official Test to Toshiba within twenty hour (24) of the conduct of the Tests.

11

Report After finishing the test, the Draft Final Test Report including following information will be issued by HDEC within seven (7) working days to Toshiba. Toshiba will review and submit any comments it may have within fourteen (14) working days. If there are no disputes after the submission of the Toshiba comments, HDEC will submit the Final Test Report within fourteen (14) days after submission of Toshiba's comments. -

Summary of the Test

-

Result of the Test

-

Discussion Topic

-

Data Sheet Measured

-

Calibration Certificates

10

11

12

PCD-GMH-GEO-0002 Rev.0

Measuring Instruments List

Appendix 2. Primary Insturment List

Generator

Reading Frequency min

Reference Drawing No.

HDEC

Local

1 min

1GMH01446

Permanent

HDEC

DCS

1 min

7-087-M09-00051

Gas sample analysis

Temporary

HDEC

Laboratory

-

1GMH01446

4

RTD (thermal well)

Temporary

HDEC

Local

1 min

1GMH01446

PP

4

Pressure Transmitter

Temporary

HDEC

Local

1 min

1GMH01446

-

1

Digital power meter

Temporary

HDEC

Generator test terminal

1 min

-

Q’ty

Type

Permanent/ Temporary

Supplier

Pressure

PP

2

Pressure Transmitter

Temporary

Flow

FIT5101

1

Flow meter

NCG

Sample point from main steam line

1

Temperature

TW

Pressure

Main steam

Turbine exhaust

Location

Customer Tag No.

Measuring Item

Output Power Factor

Calibrated by

Measured by

Note 1. Primary instruments are to be used directly for Power Output calculation. Secondary instruments are to be referred to for the confirmation of measurement stability & validity

13

PCD-GMH-GEO-0002 Rev.0

Measuring Instruments List

Appendix 2. Secondary Insturment List Measuring Item

Customer Tag No.

Q’ty

087-T-PIT-001L

1

087-T-PIT-001R

1

087-T-TE-001L

1

087-T-TE-001R

1

Pressure

087-T-PDIT-001L

1

Pressure

087-T-PDIT-001R

1

Pressure

087-T-PIT-002

1

Pressure

087-T-PIT-003

1

Temperature

087-T-TE-220

1

Pressure

087-T-PIT-005

1

Pressure

087-T-PIT-004

1

Temperature

087-T-TE-002

1

-

1

Pressure Main steam Temperature

Main steam strainer Turbine inlet bowl Turbine 1st stage Grand steam condenser Turbine exhaust

Turbine Speed Voltage Generator

Current

-

Location

Reading Frequency min

Reference Drawing No.

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Casing

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Local

1 min

1GMH01446

Permanent

TOSHIBA

Casing

1 min

1GMH01446

Electronic

Permanent

TOSHIBA

DEHC / DCS

1 min

-

Digital power meter

Temporary

TOSHIBA

DEHC / DCS

1 min

-

Type Pressure Transmitter Pressure Transmitter RTD (thermal well) RTD (thermal well) Pressure Differential Guage & Pressure Transmitter Pressure Transmitter RTD (thermal well) Pressure Transmitter Pressure Transmitter RTD (thermal well)

Permanent/ Temporary

Supplier

Permanent

Calibrated by

Measured by

Frequency Note 1. Primary instruments are to be used directly for Power Output calculation. Secondary instruments are to be referred to for the confirmation of measurement stability & validity

14

15

APPENDIX 4 Pre- Uncertaint Calculation SYSTEMATIC UNCERTAINTY 1. Systematic Uncertainty of Gross Output Component

Specification

Systematic Uncertainty

Number of elements

One Watt-hour meter

1

(m)

Watt-hour meter

Temporary watt meter

+/- 0.02 %

(a)

Voltage Transformer

+/- 0.3 %

(b)

Currenct Transformer

+/- 0.3 %

(c)

2

0.5 2

0.5 2 0.5

Remark

+/- 0.425 %

Total Systematic Uncertainty = [ a + (b/m ) + (c/m ) ]

2. Systematic Uncertainty of STG Power Factor Component

Specification

Systematic Uncertainty

Number of elements

One element of watt meter

1

(m)

Power Factor

Temporary watt meter

+/- 0.02 %

(a)

0.5 2 0.5

Remark

+/- 0.020 %

Total Systematic Uncertainty = [ (a/m ) ]

3. Systematic Uncertainty of Steam Flow Rate Component

Specification

Systematic Uncertainty

Number of elements

One element of Steam flow meter

1

(m)

Flow meter (FIT-5101)

Permanent Steam Flow meter

+/- 0.57 %

(a)

0.5 2 0.5

Remark

+/- 0.570 %

Total Systematic Uncertainty = [ (a/m ) ]

4. Systematic Uncertainty of Main Steam Pressure Component

Specification

Systematic Uncertainty

Number of elements

One absolute pressure for Ambient

1

(m)

Absolute pressure transmitter

Temporary

+/- 0.10 %

(a)

Number of elements

Two static pressure transmitter

2

(n)

Static pressure transmitter

Temporary

+/- 0.10 %

(b)

0.5 2 +

Total Systematic Uncertainty = [ (a/m )

0.5 2 0.5

Remark

+/- 0.122 %

(b/n ) ]

5. Systematic Uncertainty of Exhaust Pressure Component

Specification

Systematic Uncertainty

Number of elements

One absolute pressure for Ambient

1

(m)

Absolute pressure transmitter

Temporary

+/- 0.10 %

(a)

Number of elements

Four elements differential pressure transmitter

4

(n)

Differential pressure transmitter

Temporary

+/- 0.10 %

(b)

0.5 2 +

Total Systematic Uncertainty = [ (a/m )

0.5 2 0.5

Remark

+/- 0.112 %

(b/n ) ]

6. Systematic Uncertainty of NCG Content Component

Specification

Systematic Uncertainty

Number of samples

Three samples during test run

3

(m)

Samples

Laboratory Analysis

+/- 0.20 %

(a)

0.5 2 0.5

Remark

+/- 0.115 %

Total Systematic Uncertainty = [ (a/m ) ]

TEST UNCERTAINTY for STEAM TURBINE TEST

VARIABLE

Θi

Bi

Θi x Bi

Si

Θi x Si

SENSITIVITY

SYSTEMATIC UNCERTAINTY

SYSTEMATIC UNCERTAINTY CONTRIBUTION

STANDARD DEVIATION OF THE MEAN

RANDOM UNCERTAINTY CONTRIBUTION

Gross Power Output

1.000%

per %

0.425 %

0.4247 %

0.300 %

0.3000 %

STG Power Factor

0.012%

per %

0.020 %

0.0002 %

0.300 %

0.0036 %

Steam Flow Rate

1.000%

per %

0.570 %

0.5700 %

0.300 %

0.3000 %

Main Steam Pressure

1.330%

per %

0.122 %

0.1629 %

0.300 %

0.3990 %

Exhaust Pressure

0.300%

per %

0.112 %

0.0335 %

0.300 %

0.0900 %

NCG Content

0.007%

per %

0.115 %

0.0008 %

0.300 %

0.0020 %

SYSTEMATIC UNCERATAINTY, B

0.730 %

Sensitivity by correction curve

root sum square of Θi x Bi

RANDOM UNCERATAINTY, S

0.589 %

"t" value (Student's t)

1.960 %

TOTAL UNCERATAINTY OF CORRECTED POWER OUTPUT, Up

1.366 %

16

REMARK

root sum square of Θi x Si

(B^2 + (t x S)^2)^0.5

17

18

LST-GMH-XISL1-0002 Rev.4

Contents

For SIL 1. Correction factor for Main Steam Flow 2. Correction factor for Main Steam Pressure 3. Correction factor for Exhaust Pressure 4. Correction factor for NCG content 5. Correction factor for Generator Power Factor

19

LST-GMH-XISL1-0002 Rev.4

Correction of Gross Output The measured Gross Output shall be corrected as follows OUTcoyy

= OUTt / COUT

OUTcoyy

: Output corrected to rated operating conditions

OUTt

: Output measured during performance test.

COUT

: Total Correction factor for Output correction

The total correction factor shall be obtained as COUT where CFflow

= (1+CFflow/100) x (1+CFip/100) x (1+CFexh/100) x (1+CFncg/100) x (1+CFpf/100) : Correction factor for main steam flow = (measured steam flow / expected steam flow)

CFip

: Correction factor for main steam pressure

CFexh

: Correction factor for exhaust pressure

CFncg

: Correction factor for NCG content

CFpf

: Correction factor for power factor

Note : Correction factors, CFip, must be applied in conjunction with the correction factor for main steam flow to the turbine, CFflow.

20

LST-GMH-XISL1-0002 Rev.4

Notes for the correction curves 1) This correction curve shall be applied to the following main steam supply condition

For SIL Main steam pressure :

19.5 bara

Main steam Temperature : NCG in steam :

210.5 degC 2.7 wt%

Steam flow to turbine :

579,000 kg/h

Exhaust pressure :

1.3 bara

Power factor :

0.85 LAGGING

21

※ The main steam pressure used in correction factor is with NCG

22

※ The main steam pressure used in correction factor is with NCG

23

※ The main steam pressure used in correction factor is with NCG

24

25

26

27

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