This appendix has been prepared to facilitate the calculation and correction of turbine test results by furnishing numerical examples of the procedures outlined in PTC 6, the Performance Test Code on Steam Turbines. The feedwater heating cycles and gland leak-off systems have been simplified by avoiding unnecessarily long or repetitive calculations while still demonstrating the basic principles involved. The general guidelines for making these calculations and comparisons to specified performance are given.

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PDF Pages	PDF Title
5	Foreword
7	Notice
9	Committee Roster
10	Board Roster
15	Section 1 – Introduction
17	Section 2 – Definitions and Description of Terms
20	Section 2.1 – Temperature-Entropy Diagrams
23	Section 3 – Guidance for Comparison of Test Results
24	Section 3.1 – Cycle Corrections
25	Section 4 – Flow Measurement by the Enthalpy-Drop Method
26	Section 4.1 – High Pressure Leakoff From the No. 1 Gland Discharged Into the Turbine Exhaust Line Section 4.1 – Calculation of Throttle Flow
27	Section 5 – Sample Calculation for the Reynolds Number Extrapolation of a Calibrated ASME Test Flow Section
28	Section 5.1 – Calibration Example Data
29	Section 5.1 – Extrapolation of Calibration Data Using PTC 6-1996 Procedures
33	Section 6 – Sample Calculations for a Test of a Complete Expansion Condensing Turbine Using U.S. Customary Units
34	Section 6.1 – Specified Performance
35	Section 6.2 – Instrumentation and Flow Diagram: Complete Expansion Condensing Turbine
36	Section 6.3 – Generator Electrical Losses
37	Section 6.1 – Steam Rate Corrections
38	Section 6.4 – Throttle Temperature Correction Section 6.5 – Throttle Pressure Correction
39	Section 6.6 – Exhaust Pressure Correction
41	Section 6A – Sample Calculations for a Test of a Complete Expansion Condensing Turbine Using SI Units
42	Section 6A.1 – Specified Performance
43	Section 6A.2 – Generator Electrical Losses
45	Section 6A.3 – Throttle Temperature Correction Section 6A.4 – Throttle Pressure Correction
46	Section 6A.5 – Exhaust Pressure Correction
47	Section 7 – Sample Calculation for a Test of a Non-Reheat Regenerative Cycle Turbine
48	Section 7.1 – Guarantee Heat Balance
49	Section 7.2 – Determination of Test Heat Rate at Guaranteed Output
51	Section 7.1 – Test Data
53	Section 7.3 – Correction for Main Steam Desuperheating Spray Flow Section 7.4 – Final Feedwater Temperature Correction
54	Section 7.2 – Group 1 Corrections
55	Section 7.5 – Throttle Pressure Correction Factors: Heat Rate Section 7.6 – Throttle Pressure Correction Factors: Output
56	Section 7.7 – Throttle Temperature Correction Factors: Heat Rate Section 7.8 – Throttle Temperature Correction Factors: Output
57	Section 7.9 – Exhaust Pressure Correction Factor
58	Section 7.3 – Deviations of Group 2 Variables Section 7.4 – Group 2 Corrections
61	Section 8 – Sample Calculation for a Test of a Reheat-Regenerative Cycle Turbine
62	Section 8.1 – Test Cycle
63	Section 8.2 – Extraction Flows to High Pressure Heaters
65	Section 8.3 – Extraction Flows to Low Pressure Heaters
66	Section 8.4 – Turbine Expansion Line
68	Section 8.1 – Calculation of Expansion-Line End Point (ELEP)
69	Section 8.5 – Generator Losses
70	Section 8.6 – Exhaust Losses
72	Section 8.7 – First Approximation (Test Turbine in Specified Cycle)
74	Section 8.2 – Steam Flows Through the Stages of the Turbine in the First Approximation (For the First Iteration)
75	Section 8.3 – Test Relationships
76	Section 8.4 – Revised Extraction Pressures: First Approximation
77	Section 8.8 – Second Approximation (Test Turbine in Specified Cycle)
78	Section 8.5 – Steam Flows Through the Stages of the Turbine in the Second Approximation (For the First Iteration)
79	Section 8.6 – Revised Extraction Pressures: Second Approximation
80	Section 8.7 – Turbine Heat Rate and Generator Output Section 8.8 – Correction Factors
82	Section 8.9 – Throttle Pressure Correction Factors
83	Section 8.10 – Throttle Temperature Correction Factors
84	Section 8.11 – Reheat Temperature Correction Factors
85	Section 8.12 – Reheater Pressure Drop Correction Factors
86	Section 8.13 – Exhaust Pressure Correction Factor
87	Section 8.14 – Specified Heat Balance
88	Section 8.15 – Heat Rate Versus Load
89	Section 8A – Sample Calculation for a Test of a Reheat-Regenerative Cycle Using the Alternative Procedure With Final Feedwater Flow Measurement
91	Section 8A.1 – Reheat-Regenerative Test Cycle
92	Section 8A.2 – Diagram for No. 7 Heater Extraction Steam Flow
93	Section 8A.3 – Final Feedwater Temperature Correction
94	Section 8A.4 – Auxiliary Extraction Correction (Extraction Downstream of Re-Heater).
95	Section 8A.5 – Correction for Auxiliary Extraction From Cold Reheat
96	Section 8A.6 – Corrections for Main Steam and Reheat Steam Desuperheating Flow. .
97	Section 8A.7 – Condensate Subcooling Correction Section 8A.1 – Comparison Between Test Cycle and Specified Cycle, Group 1 Variables
100	Section 8A.2 – Group 1 Corrections Section 8A.3 – Comparison Between Test Cycle and Specific Cycle, Group 2 Variables
101	Section 8A.4 – Group 2 Corrections
103	Section 9 – Sample Calculation for a Steam Turbine Operating in a Nuclear Cycle
104	Section 9.1 – Specified Heat Rate Curve
105	Section 9.2 – Test Cycle Diagram
106	Section 9.3 – Expansion Line and Steam Conditions Leaving No. 6 Heater Extraction Stage Point
107	Section 9.4 – No. 6 Heater Extraction Flow and Enthalpy
108	Section 9.5 – No. 5 Heater Extraction Flow and Enthalpy
109	Section 9.6 – No. 4 Heater Extraction Flow and Enthalpy
110	Section 9.7 – No. 3 Heater Extraction Flow
111	Section 9.8 – No. 2 Heater Extraction Flow and Enthalpy
112	Section 9.9 – No. 1 Heater Extraction Flow Section 9.10 – Steam Flow to Moisture Separator Reheater
114	Section 9.1 – Calculation of Low Pressure Turbine Exhaust Enthalpy
115	Section 9.11 – Nomenclature for High Pressure Turbine Expansion
117	Section 9.12 – Expansion Line and Steam Conditions Leaving No. 5 Heater Extraction Stage Point
120	Section 9.13 – Expansion Line and Steam Conditions Leaving No. 3 Heater Extraction Stage Point
122	Section 9.14 – Expansion Line and Steam Conditions Leaving No. 2 Heater Extraction Stage Point
123	Section 9.15 – Expansion Line and Steam Conditions Leaving No. 1 Heater Extraction Stage Point
125	Section 9.2 – Test Steam Path Pressure/Flow Relationships
126	Section 9.16 – H-S Diagram of Test Cycle High Pressure Turbine
127	Section 9.17 – H-S Diagram of Test Cycle Low Pressure Turbine
129	Section 9.18 – Test Turbine in Specified Cycle
135	Section 9.19 – Expansion Line and Steam Conditions Leaving No. 4 Heater Extraction Stage Point
136	Section 9.20 – Throttle Pressure Correction to Heat Rate and Load
137	Section 9.21 – Throttle Temperature Correction to Heat Rate and Load
138	Section 9.22 – Exhaust Pressure Correction to Heat Rate
139	Section 9.23 – H-S Diagram From Test Turbine in Specified Cycle, High Pressure Turbine
140	Section 9.24 – H-S Diagram From Test Turbine in Specified Cycle, Low Pressure Turbine
141	Section 9.25 – Exhaust Loss Section 9.26 – Generator Losses
151	Section 9.3 – Calculation of Generator Load by Heat Balance Around the Turbine-Generator
152	Section 9.4 – Group 2 Correction Factors (Using Manufacturer’s Correction Curves).
153	Section 10 – Sample Calculation for a Test of an Automatic Extraction Non-condensing Turbine
154	Section 10.1 – Expected Performance
155	Section 10.2 – Leakoff Flows
156	Section 10.3 – Flow and Instrumentation Diagram: Automatic Extraction Noncondensing Turbine
157	Section 10.4 – Generator Losses
158	Section 10.5 – Steam Conditions Correction Factors
161	Section 11 – Sample Calculation for a Test of an Automatic Extraction Condensing Turbine
162	Section 11.1 – Expected Performance
163	Section 11.2 – Flow and Instrumentation Diagram
164	Section 11.3 – Generator Electrical Losses
165	Section 11.4 – Exhaust Pressure Correction
166	Section 11.5 – Extraction Pressure Correction
167	Section 11.6 – Throttle Temperature Correction
168	Section 11.7 – Throttle Pressure Correction
169	Section 12 – Sample Calculation for a Test of a Variable Speed Mechanical Drive Turbine
170	Section 12.1 – Flow and Instrumentation Diagram
171	Section 12.2 – Throttle Steam Rate Versus Turbine Shaft Output
172	Section 12.1 – Correction Divisors for the Test Steam Conditions
173	Section 12.3 – Steam Rate Correction Factor Versus Speed Section 12.4 – Steam Rate Correction Factor Versus Inlet Pressure
174	Section 12.5 – Steam Rate Correction Factor Versus Inlet Temperature
175	Section 12.6 – Steam Rate Correction Factor Versus Exhaust Pressure
177	Section 13 – Sample Calculation for a Test of a Refurbished LP Turbine Using U.S. Customary Units
178	Section 13.1 – Results of Baseline and Verification Tests
180	Section 13.1 – Location of Test Instrumentation for Test of Refurbished LP Turbine. . .

Published By	Publication Date	Number of Pages
ASME	2000	186


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Standard Title	ASME PTC 6A – 2000: Appendix A to PTC 6 The Test Code for Steam Turbines – Reapproved 2016
Published Code	ASME
Publication Date	2000
Pages Count	186

ASME PTC 6A 2000 R2016

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