Reliability and Availability Study of a Gas Turbine based on usual Approaches with a Failure Mode Analysis

2021 ◽  
Vol 69 (4) ◽  
pp. 74-86
Author(s):  
Ahmed Zohair DJEDDI ◽  
◽  
Ahmed HAFAIFA ◽  
Abdelhamid IRATNI ◽  
◽  
...  
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Real Data ◽  
Mode Analysis ◽  
Transportation Industry ◽  
Gas Recovery ◽  
Rotating Machine ◽  
Start Up ◽  
Failure Mode Analysis ◽  
Proper Operation

The rotating machines like gas turbine types are highly valuable in the gas transportation industry. They are often strategic and have a major impact on the proper operation of gas transport and compression facilities. In this context, the aim of this work is to increase efficiency and production by developing an approach for this kind of installations using real data collected from the operation of the gas turbine. The objective is to provide a database relating to the reliability, availability, and maintenance of gas turbines while using standard reliability approaches. In addition, ensuring maximum availability of this type of rotating machine by preventing its failures and reducing emissions, and by minimizing start-up sequences, which reduces emissions when starting this machine. Also, the proper operation of these gas turbine installations with the reliability approaches developed in this work makes it possible to model the effects of failures in order to predict optimal operating performance and increase the life of their components. This, therefore, ensures a reliable and safe operation of the gas turbine in a compression station for economically profitable gas recovery.

Remote Condition Monitoring of a Peaking Gas Turbine

1991 ◽  
Author(s):  
Ralph E. Harris ◽  
Harold R. Simmons ◽  
Anthony J. Smalley ◽  
Richard M. Baldwin ◽  
George Quentin
Keyword(s):  
Gas Turbine ◽  
Condition Monitoring ◽  
Gas Turbines ◽  
Vibration Amplitude ◽  
Thermal Stabilization ◽  
Cost Effective ◽  
System Structure ◽  
Start Up ◽  
Data Content ◽  
Software And Hardware

This paper illustrates how software and hardware for telecommunications and data acquisition enable cost-effective monitoring of peaking gas turbines using personal computers. It describes the design and evaluation of a system which transmits data from each start-up and shutdown over 1,500 miles to a monitoring computer. It presents system structure, interfaces, data content, and management. The system captures transient sequences of acceleration, synchronization, loading, thermal stabilization, steady operation, shutdown and cooldown; it yields coherent sets of speed, load, temperature, journal eccentricity, vibration amplitude, and phase at intervals appropriately spaced in time and speed. The data may be used to characterize and identify operational problems.

Danish Navy Experience With the KV-72 LM2500 CODOG Propulsion Plant

1983 ◽  
Author(s):  
Bent Hansen ◽  
Sloth Larsen ◽  
John W. Tenhundfeld
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Turbine Engines ◽  
Operational Experience ◽  
Gas Turbine Engines ◽  
Joint Effort ◽  
General Electric Company ◽  
Electric Company ◽  
Start Up ◽  
Selection Of

For more than twenty years the Royal Danish Navy (RDN) has been using gas turbine engines for propulsion of fast patrol vessels as well as frigates. This paper, which is the result of a joint effort by the Royal Danish Navy, Aalborg Vaerft Shipyard, and General Electric Company USA, describes how the propulsion system design was developed using previous RDN gas turbine system experience. A detailed description of the ship, the selection of machinery, and design of the propulsion configuration, including the LM2500 gas turbine module, is included. The three Royal Danish “KV-72” corvettes of the NIELS JUEL class have now been in operation for almost three years. Since the start-up of the NIELS JUEL machinery in November 1978 the CODOG propulsion plants aboard this class have accumulated more than 8,000 running hours, of which over 1,500 hours have been in the gas turbine or “sprint” drive mode. Operational experience with the GE LM2500 gas turbines is also described.

scholarly journals Modern Base Load Gas Turbines Running on Crude Oil: Long Time Effects and Experience

1982 ◽  
Author(s):  
B. Basler ◽  
P. C. Felix
Keyword(s):  
Crude Oil ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Diesel Oil ◽  
Time Effects ◽  
Start Up ◽  
Long Time ◽  
Reliability Numbers ◽  
Base Load ◽  
Better Than

Crude oils are favorable gas turbine fuels, particularly in areas where light crudes are available and distillates in sufficient quantities are difficult to obtain. In Riyadh, Saudiarabia, local Khurais crude oil is therefore certainly the most reasonable gas turbine fuel. This paper shows the long time experience with this type of fuel gathered in ten modern BBC type 11 turbines with a total of over 100,000 operating hours. The main problems and the measures taken to overcome these problems are described in detail. The operational record of the Riyadh 5 power plant of the last three years demonstrates that it is possible to run a powerplant without any diesel oil for blending or start up, e.g., and still to obtain availability and reliability numbers which are as good or better than for a diesel or gas fired plant.

scholarly journals Considerations for Gas Turbines and Their Initial Operating Experiences at El Convento

1960 ◽  
Author(s):  
O. H. Pfersdorff
Keyword(s):  
Power Generation ◽  
Control Systems ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Design Data ◽  
Future Outlook ◽  
Operating Data ◽  
Start Up ◽  
The Future ◽  
The Individual

When original negotiations are made for the presentation of a report regarding “initial operating data” or “operating results,” it is hoped that all factors will contribute toward useful information to enlighten and assist others in the same operating category. Oftentimes this is not completely accomplished in the alloted time. This paper is presented to set forth the initial operating experiences and results of two highly controlled gas-turbine units for power generation. The individual turbine arrangement, fuel systems, control systems, start-up and operating problems and a comparison of test and design data are stated. The future outlook for gas turbines in the Electricidad de Caracas system is discussed.

scholarly journals Modeling and Control of the Starter Motor and Start-Up Phase for Gas Turbines

Electronics ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 363
Author(s):  
Soheil Jafari ◽  
Seyed Miran Fashandi ◽  
Theoklis Nikolaidis
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Numerical Solutions ◽  
Frequency Converter ◽  
Variable Structure ◽  
Transient Behavior ◽  
Intermediate Stage ◽  
Mechatronic System ◽  
Turbine Performance ◽  
Start Up

Improving the performance of industrial gas turbines has always been at the focus of attention of researchers and manufacturers. Nowadays, the operating environment of gas turbines has been transformed significantly respect to the very fast growth of renewable electricity generation where gas turbines should provide a safe, reliable, fast, and flexible transient operation to support their renewable partners. So, having a reliable tools to predict the transient behavior of the gas turbine is becoming more and more important. Regarding the response time and flexibility, improving the turbine performance during the start-up phase is an important issue that should be taken into account by the turbine manufacturers. To analyze the turbine performance during the start-up phase and to implement novel ideas so as to improve its performance, modeling, and simulation of an industrial gas turbine during cold start-up phase is investigated this article using an integrated modular approach. During this phase, a complex mechatronic system comprised of an asynchronous AC motor (electric starter), static frequency converter drive, and gas turbine exists. The start-up phase happens in this manner: first, the clutch transfers the torque generated by the electric starter to the gas turbine so that the turbine reaches a specific speed (cranking stage). Next, the turbine spends some time at this speed (purging stage), after which the turbine speed decreases, sparking stage begins, and the turbine enters the warm start-up phase. It is, however, possible that the start-up process fails at an intermediate stage. Such unsuccessful start-ups can be caused by turbine vibrations, the increase in the gradients of exhaust gases, or issues with fuel spray nozzles. If, for any reason, the turbine cannot reach the self-sustained speed and the speed falls below a certain threshold, the clutch engages once again with the turbine shaft and the start-up process is repeated. Consequently, when modeling the start-up phase, we face discontinuities in performance and a system with variable structure owing to the existence of clutch. Modeling the start-up phase, which happens to exist in many different fields including electric and mechanical application, brings about problems in numerical solutions (such as algebraic loop). Accordingly, this study attempts to benefit from the bond graph approach (as a powerful physical modeling approach) to model such a mechatronic system. The results confirm the effectiveness of the proposed approach in detailed performance prediction of the gas turbine in start-up phase.

A Model for the Simulation of Large-Size Single-Shaft Gas Turbine Start-Up Based on Operating Data Fitting

2007 ◽  
Author(s):  
Mirko Morini ◽  
Giovanni Cataldi ◽  
Michele Pinelli ◽  
Mauro Venturini
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Thermal Stresses ◽  
Simulated Data ◽  
Data Fitting ◽  
Turbine Engine ◽  
Operating Data ◽  
Large Size ◽  
Start Up ◽  
Thermal Status

Start-up is an important aspect of gas turbine operation. In the last years plant operators have shown an ever increasing interest in this critical phase, with particular focus on start-up reliability and start-up time. Several issues should be considered in order to achieve optimal start-up behavior: operability issues (e.g. compressor aerodynamics, combustor light-off and light-around, shaft acceleration), impact of thermal stresses on cyclic life, proper sizing of external starting devices. Models for the simulation of gas turbine behavior during start-up are very useful both for the design of new gas turbines and for the analysis and improvement of engines already in operation. In this paper, a physics-based model for the simulation of the start-up phase of large-size single-shaft gas turbines is presented. The model is based on operating data fitting and covers machine operation from combustor light-off to compressor blow off valve closure. The model makes use of steady-state component characteristics, while dynamics is taken into account through shaft power balance. Special features are also included to properly model the effects of heat soakage, i.e. the dependence of the engine behavior on its thermal status before the start-up. The quality of the model has been proven by application to the gas turbine engine ALSTOM GT13E2 and by comparison between measured and simulated data.

scholarly journals Stand-By Forced Draft Fan Versus Supercharging Gas Turbines for Pre-Combustion Air to Fully Fired Boilers in Combined Cycles

1982 ◽  
Author(s):  
J. O. Stephens
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Combined Cycle ◽  
First Case ◽  
Start Up ◽  
Boiler Operation ◽  
Combined Cycles ◽  
Forced Draft ◽  
Technical Features

The purpose of this paper is to analyze the technical features of two different arrangements of supplying fresh air to the boilers in fully fired combined cycles for continuous boiler operation using a forced draft fan when the gas turbine is out of service. The first case is the conventional stand-by forced draft fan and the second is the supercharged fan arrangement. Two methods of separating the cycles are reviewed in detail: a) Cold start-up of system. b) While operating in the combined cycle mode, the gas turbine trips. c) While operating the boiler with fresh air firing the gas turbine is started for combined cycle operation. d) Normal shut down of the gas turbine. e) While operating in the combined cycle mode, the boiler trips. This paper presents the results of a study of a 350-MW combined cycle power plant for Alsands Energy Ltd., of Calgary, Alberta, Canada.

Evolution of MHPS Large Frame Gas Turbines: J to Air-Cooled JAC

2018 ◽  
Author(s):  
Kentaro Suzuki ◽  
Yoshikazu Matsumura ◽  
Kazumasa Takata ◽  
Satoshi Hada ◽  
Masanori Yuri ◽  
...  
Keyword(s):  
Power Systems ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Technology Development ◽  
Combined Cycle ◽  
Component Technology ◽  
Inlet Temperature ◽  
Start Up ◽  
Turbine Component ◽  
Ultrahigh Temperature

Mitsubishi Hitachi Power Systems, Ltd. (MHPS) has continued to contribute to the preservation of the global environment and the stable supply of energy through the constant development of gas turbines. The contribution is based on the abundant operating results, research, and verification of state-of-the-art technology. Since 2014 MHPS has been using progressive knowledge obtained from the Japanese National Project’s “1700°C Class Ultrahigh-Temperature Gas Turbine Component Technology Development.” The highly-efficient M501J gas turbine was successfully developed and has achieved the world’s first turbine inlet temperature of 1600°C because of this effort. Verification operation of the M501J at T-point, the verification plant, which MHPS owns in Takasago, started in 2011. Thereafter, M501J gas turbines have been delivered all over the world, and have accumulated more than 500,000 Actual Operating Hours (AOH). To further improve the efficiency and power output of the gas turbine combined cycle (GTCC), a new enhanced air-cooled system for the combustor was installed replacing the steam-cooled system employed in the J-series. The compressor was also redesigned with an advanced design approach that ensures the mechanical soundness of the parts and the performance upgrade in inlet flow as well as start-up characteristics.

Comparison of Operating Characteristics of a Two-Shaft Gas Turbine With a Single-Shaft Gas Turbine for Gas Line Pumping

1960 ◽  
Author(s):  
M. J. McDonough
Keyword(s):  
Gas Turbine ◽  
Fuel Consumption ◽  
Centrifugal Compressor ◽  
Gas Turbines ◽  
Low Cost ◽  
Prime Mover ◽  
Transportation Industry ◽  
Operating Characteristics ◽  
Shaft Unit ◽  
Discharge Pressure

Gas turbines are playing an important role in the ever-expanding gas-transportation industry. Coupled to a centrifugal compressor the gas turbine provides a low-cost, flexible prime mover for gas transmission. The two types of gas turbines most commonly used in this field are the single-shaft unit and the two-shaft unit. This paper describes and compares the operating characteristics of each unit along a typical centrifugal-compressor loading line for constant station discharge pressure. Horsepower-speed relationships and specific fuel consumption are considered in this comparison.

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