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