Continued Enhancement of SGT-600 Gas Turbine Design and Maintenance

2008 ◽  
Author(s):  
Vladimir Navrotsky ◽  
Mats Blomstedt ◽  
Niklas Lundin ◽  
Claes Uebel
Keyword(s):  
Life Cycle ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Life Cycle Cost ◽  
High Reliability ◽  
Medium Size ◽  
Power Turbine ◽  
History Of ◽  
And Control ◽  
Reliability And Availability

Current power generation and oil & gas markets are dynamic with continuously growing requirements on gas turbines for high reliability and availability and low emissions and life cycle cost. In order to meet these growing requirements on the gas turbines, the OEM should sustain continued product improvement and employment of innovative solutions and technologies in the area of design, operation and maintenance. This paper describes the successful development and operation experiences of SGT-600 Siemens’ medium size gas turbine and in particular the latest achievements in maintenance and life cycle improvements. High reliability and availability of SGT-600 gas turbine were enabled by further improvements and modifications of the combustor, compressor turbine blade 1 and vane 1, power turbine diffuser and control system. The developed modifications enable operators to utilize the opportunity: • to extend the life cycle of the engine beyond 120,000 EOH (Equivalent Operating Hours), up to 180,000 EOH, depending on the previous operation profile and history of the installation; • to extend the maintenance intervals from 20,000 EOH to 30,000 EOH and that to increase the availability of the engine by up to 1%; • to reduce the emission level to the latest SGT-600 standards.

Repair of Advanced Gas Turbine Blades

2007 ◽  
Author(s):  
Reiner Anton ◽  
Brigitte Heinecke ◽  
Michael Ott ◽  
Rolf Wilkenhoener
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Life Cycle Cost ◽  
High Efficiency ◽  
High Reliability ◽  
Turbine Blades ◽  
Cost Effective ◽  
Complex Nature ◽  
Thin Wall ◽  
Advanced Technologies

The availability and reliability of gas turbine units are critical for success to gas turbine users. Advanced hot gas path components that are used in state-of-the-art gas turbines have to ensure high efficiency, but require advanced technologies for assessment during maintenance inspections in order to decide whether they should be reused or replaced. Furthermore, advanced repair and refurbishment technologies are vital due to the complex nature of such components (e.g., Directionally Solidified (DS) / Single Crystal (SC) materials, thin wall components, new cooling techniques). Advanced repair technologies are essential to allow cost effective refurbishing while maintaining high reliability, to ensure minimum life cycle cost. This paper will discuss some aspects of Siemens development and implementation of advanced technologies for repair and refurbishment. In particular, the following technologies used by Siemens will be addressed: • Weld restoration; • Braze restoration processes; • Coating; • Re-opening of cooling holes.

scholarly journals Desktop Failure Analysis on a Microcomputer Using Weibull, Lognormal and Renewal Data

1989 ◽  
Author(s):  
J. L. Byers
Keyword(s):  
Life Cycle ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Life Cycle Cost ◽  
Failure Modes ◽  
Probability Distributions ◽  
Typical Case ◽  
Central Computer ◽  
User Friendly ◽  
Lognormal Probability

Gas turbine components and parts are widely known to have many failure modes for which the failures correlate in either the Weibull or Lognormal probability distributions. This paper describes a typical case which is handled by the new computer programs now being used by the U. S. Navy. These programs have brought the capability to make such analyses directly to the designer or analysts desk instead of having to be sent off to a central computer to wait in line. The programs are interactive with the user and extremely user friendly. Uses are expanding to cover almost every area in the life cycle of gas turbines where it would be beneficial to forecast future failures. This makes the programs useful to managers, logisticians, life cycle cost analysts, and a host of others. Wide applicability of the methods assures usage outside of the gas turbine field.

Desktop Failure Analysis on a Microcomputer Using Weibull, Lognormal, and Renewal Data

1990 ◽  
Vol 112 (2) ◽  
pp. 233-236
Author(s):  
J. L. Byers
Keyword(s):  
Life Cycle ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Life Cycle Cost ◽  
Failure Modes ◽  
Probability Distributions ◽  
Typical Case ◽  
Central Computer ◽  
User Friendly ◽  
Lognormal Probability

Gas turbine components and parts are widely known to have many failure modes for which the failures correlate in either the Weibull or Lognormal probability distributions. This paper describes a typical case, which is handled by the new computer programs now being used by the U. S. Navy. These programs have brought the capability to make such analyses directly to the designer or analyst’s desk instead of having to be sent off to a central computer to wait in line. The programs are interactive with the user and extremely user friendly. Uses are expanding to cover almost every area in the life cycle of gas turbines where it would be beneficial to forecast future failures. This makes the programs useful to managers, logisticians, life cycle cost analysts, and a host of others. Wide applicability of the methods assures usage outside of the gas turbine field.

Economic Considerations for a New Gas Turbine System in the U.S. Navy

1988 ◽  
Vol 110 (2) ◽  
pp. 271-278
Author(s):  
J. C. Ness ◽  
C. B. Franks ◽  
R. L. Sadala
Keyword(s):  
Life Cycle ◽  
Gas Turbine ◽  
Support System ◽  
Gas Turbines ◽  
Life Cycle Cost ◽  
System Development ◽  
Test Program ◽  
Cost Item ◽  
Economic Analyses ◽  
New System

During the phases of a U.S. Navy acquisition program for any new system, such as a gas turbine system, various analyses are conducted to evaluate the economic and technical benefits that can be gained by the new system. It is important that the economic analyses provide a good estimation of the nonrecurring and recurring costs. For the development of a new gas turbine system, a test program to prove the system’s technical and operational capability will have to be conducted and a support system will have to be developed to operate and maintain it during its life cycle. The costs of the engine development, the test program, and the support system development are considered nonrecurring or investment costs. The operation and maintenance costs over the life of the system are the recurring costs. This paper presents the life cycle cost scenario that should be used to evaluate the economics of a U.S. Navy marine gas turbine and the considerations that should be included in a Return on Investment analysis of the engine. The major cost categories discussed include engineering, logistics support, program management, and deployment support. Also, the unique considerations that would apply to marine gas turbines for Naval use are discussed along with how these considerations affect the economics of a gas turbine acquisition program. In addition, the paper identifies the funding responsibility of each cost item and provides discussion on ways to reduce the investment cost.

Gas Turbine Inlet Filtration System Life Cycle Cost Analysis

2011 ◽  
Author(s):  
Melissa Wilcox ◽  
Klaus Brun
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Life Cycle Cost ◽  
Lifetime Cost ◽  
Life Cycle Cost Analysis ◽  
Turbine Inlet ◽  
Filtration System ◽  
System Life

Gas turbine inlet filtration systems play an important role in the operation and life of gas turbines. There are many factors that must be considered when selecting and installing a new filtration system or upgrading an existing system. The filter engineer must consider the efficiency of the filtration system, particles sizes to be filtered, the maintenance necessary over the life of the filtration system, acceptable pressure losses across the filtration system, required availability and reliability of the gas turbine, and how the filtration system affects this, washing schemes for the turbine, and the initial cost of any new filtration systems or upgrades. A life cycle cost analysis provides a fairly straightforward method to analyze the lifetime costs of inlet filtration systems, and it provides a method to directly compare different filter system options. This paper reviews the components of a gas turbine inlet filtration system life cycle cost analysis and discusses how each factor can be quantified as a lifetime cost. In addition, an example analysis, which is used to select a filtration system for a new gas turbine installation, is presented.

scholarly journals On the Concept of Durability in Evaluation of Equipment Life-Cycle Cost

1992 ◽  
Author(s):  
Igor S. Ondryas
Keyword(s):  
Life Cycle ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Life Cycle Cost ◽  
Operating Costs ◽  
Surveillance Program ◽  
Life Cycle Costs ◽  
Global Marketplace ◽  
Equipment Selection ◽  
The Difference

In the increasingly competitive global marketplace the users of industrial products face the challenge of predicting accurate life-cycle costs of their equipment and machinery. The deregulation of many industries resulted in inability of operating companies to pass over to the customer the increased costs of their products, which may have been caused by inaccurate predictions of the equipment operating costs. This evolution in the 1980’s have emphasized the need for accurate predictions of the equipment operating costs and have meant the difference between profit and loss. This paper presents the concept of equipment Durability to be used in the process of evaluation the equipment life cycle cost and subsequent equipment selection. It is also the first part or primer to the paper which describes the Durability Surveillance Program on the Advanced Gas Turbines sponsored by EPRI titled “Durability Surveillance Program on the Advanced Gas Turbine GE Frame 7 F” (1).

Development of 20,000 to 50,000 HP Aircraft-Derivative Gas Turbines

1982 ◽  
Author(s):  
K. Takeo ◽  
Y. Shimura
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Experimental Testing ◽  
High Reliability ◽  
Measuring Method ◽  
Critical Limit ◽  
Turbine Plant ◽  
Power Turbine ◽  
Gas Turbine Plant ◽  
Rotor Assembly

A new gas turbine, the IM5000, which has changed the image of a gas turbine plant in view of specific size and efficiency, has been developed. In 1980, Ishikawajima-Harima Heavy Industries Co., Ltd., completed the lineup of aircraft-derivative gas turbines ranging from 15,000 to 50,000 hp when the company developed two new models in the 20,000 to 25,000 hp class, the IM2000 and the IM2500. To establish high reliability of the power turbine, an extensive investigation of the rotor assembly was completed. Engine test runs were conducted to confirm blade vibratory stresses through the whole operating range. The stress levels thus obtained revealed far below the critical limit and no detrimental resonance would be expected. The same attempt was adopted on the IM2500 power turbine which was developed in 1980. Through these two engine operations, the measuring method of blade vibratory stresses by means of strain gauges was established. Besides analyses of the rotating parts, analyses and experimental testing have been carried out on the stationary parts.

A Control System for a High-Quality Generating Set Equipped With a Two-Shaft Gas Turbine

1991 ◽  
Vol 113 (2) ◽  
pp. 290-295 ◽  
Author(s):  
H. Kumakura ◽  
T. Matsumura ◽  
E. Tsuruta ◽  
A. Watanabe
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Gas Turbines ◽  
High Quality ◽  
Constant Frequency ◽  
Generating Set ◽  
Generating Sets ◽  
Power Turbine ◽  
Computer Centers ◽  
Supply Systems

A control system has been developed for a high-quality generating set (150-kW) equipped with a two-shaft gas turbine featuring a variable power turbine nozzle. Because this generating set satisfies stringent frequency stability requirements, it can be employed as the direct electric power source for computer centers without using constant-voltage, constant-frequency power supply systems. Conventional generating sets of this kind have normally been powered by single-shaft gas turbines, which have a larger output shaft inertia than the two-shaft version. Good frequency characteristics have also been realized with the two-shaft gas turbine, which provides superior quick start ability and lower fuel consumption under partial loads.

Development and Fabrication of Silicon Nitride Components for Ceramic Gas Turbine

1997 ◽  
Author(s):  
Keisuke Makino ◽  
Ken-Ichi Mizuno ◽  
Toru Shimamori
Keyword(s):  
High Temperature ◽  
Silicon Nitride ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Turbine Blades ◽  
High Strength ◽  
Inlet Temperature ◽  
Turbine Inlet Temperature ◽  
Spark Plug ◽  
Power Turbine

NGK Spark Plug Co., Ltd. has been developing various silicon nitride materials, and the technology for fabricating components for ceramic gas turbines (CGT) using theses materials. We are supplying silicon nitride material components for the project to develop 300 kW class CGT for co-generation in Japan. EC-152 was developed for components that require high strength at high temperature, such as turbine blades and turbine nozzles. In order to adapt the increasing of the turbine inlet temperature (TIT) up to 1,350 °C in accordance with the project goals, we developed two silicon nitride materials with further unproved properties: ST-1 and ST-2. ST-1 has a higher strength than EC-152 and is suitable for first stage turbine blades and power turbine blades. ST-2 has higher oxidation resistance than EC-152 and is suitable for power turbine nozzles. In this paper, we report on the properties of these materials, and present the results of evaluations of these materials when they are actually used for CGT components such as first stage turbine blades and power turbine nozzles.

A Comparison Between ORC and Supercritical CO2 Bottoming Cycles For Energy Recovery From Industrial Gas Turbines Exhaust Gas

2021 ◽  
Author(s):  
M. A. Ancona ◽  
M. Bianchi ◽  
L. Branchini ◽  
A. De Pascale ◽  
F. Melino ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Thermal Efficiency ◽  
Gas Turbines ◽  
Supercritical Co2 ◽  
Energy Demand ◽  
Oil And Gas ◽  
Gas Production ◽  
Medium Size ◽  
Oil And Gas Production ◽  
Industrial Gas Turbines

Abstract Gas turbines are often employed in the industrial field, especially for remote generation, typically required by oil and gas production and transport facilities. The huge amount of discharged heat could be profitably recovered in bottoming cycles, producing electric power to help satisfying the onerous on-site energy demand. The present work aims at systematically evaluating thermodynamic performance of ORC and supercritical CO2 energy systems as bottomer cycles of different small/medium size industrial gas turbine models, with different power rating. The Thermoflex software, providing the GT PRO gas turbine library, has been used to model the machines performance. ORC and CO2 systems specifics have been chosen in line with industrial products, experience and technological limits. In the case of pure electric production, the results highlight that the ORC configuration shows the highest plant net electric efficiency. The average increment in the overall net electric efficiency is promising for both the configurations (7 and 11 percentage points, respectively if considering supercritical CO2 or ORC as bottoming solution). Concerning the cogenerative performance, the CO2 system exhibits at the same time higher electric efficiency and thermal efficiency, if compared to ORC system, being equal the installed topper gas turbine model. The ORC scarce performance is due to the high condensing pressure, imposed by the temperature required by the thermal user. CO2 configuration presents instead very good cogenerative performance with thermal efficiency comprehended between 35 % and 46 % and the PES value range between 10 % and 22 %. Finally, analyzing the relationship between capital cost and components size, it is estimated that the ORC configuration could introduce an economical saving with respect to the CO2 configuration.

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