Combined Cycle and Cogeneration Power

Short Cours

Gas Turbines 101

Short Cours

Solutions To Field Problems Of A Gas Turbine-Axial Flow Chemical Process Compressor Train Based On Computer Simulation Of The Process.

LecturePg. 77-92Operating and maintaining key rotating equipment in a petrochemical service and tight economic constraints requires an indepth evaluation in performance deterioration of key gas turbines and axial flow compressor parameters. By upgrading the required instrumentation on a gas turbine and an axial flow compressor, and indepth performance simulation and evaluation can be made in order to determine the overall thermodynamic performance and mechanical deterioration of the train. With the proper instrumentation, critical parameters in the gas turbine such as component efficiencies, power, head, turbine firing temperature, heat rate, and heat balance can be computed. On the axial flow compressor, section efficiencies, head, power, flow, and head coefficients can be computed. By understanding all the performance parameters and obtaining a good running history on these parameters, one can easily determine the condition of the rotating equipment at any given time. Based on these results, operation and maintenance techniques can be instituted. Major rotating equipment overhaul intervals can be identified by closely monitoring the performed deterioration parameters of any gas turbine or axial flow compressor. This enables the unit to be operated with confidence through a planned major overhaul. On a separate occasion, a costly emergency shutdown was avoided by constantly monitoring the mechanical and thermodynamic performance of the compressor train until operations created an outage time. The outage time was based on preparation to minimize the downtime, as well as take into consideration product delivery schedules. Detail analysis of the gas turbine and axial flow compressor train computer simulation is presented to enable the reader to fully evaluate their own compressor train under various operating parameters such as molecular weight, speed, and varying inlet conditions, both process as well as ambient

Diario oficial del Ministerio de Marina: Año XX Número 219 - 1925 septiembre 30

Short Cours

Experience With Online Condition Monitoring System.

LecturePg. 57-66A total online condition monitoring system has been in operation on the world's largest offshore facility located off the coast of Norway. The Ekofisk platforms are operated by the Phillips Petroleum Company Norway and supplies crude and natural gas. The system, which monitors performance, as well as mechanical parameters, has been operating for the past two years on four trains which are used for gas transmission from the platform to Emden, Germany. The system and the operating experience are described

Gas Turbines Fundamentals of Design, Operation, and Maintenance

Short Cours

Optimization Of Various Gas Turbine Cycles

PaperPg. 91-100.The gas turbine, as is used in most applications, does not utilize its maximum potential. There are many reasons that this state of affairs remains, most significant being cycle and metallurgical limitations. In this paper, the attention is paid to the cycle itself and to the thermodynamic parameters which affect it. The present paper analyzes numerous variations of the gas turbine cycles, which include various types of open and closed cycles, gas and water injection cycles, and the Rankine-Brayton combination cycles. An attempt has been made in each case to optimize the cycle in terms of pressure ratio, turbine inlet temperature, regenerator size, and other pertinent parameters. The goal of this paper is to enable the reader to evaluate various types of cycles that are being offered to him, and to choose a cycle which would best fit his needs. The paper will also aid the user in making changes to existing turbines for higher efficiency and lower NOx emissions

Aerothermal-Mechanical Health Monitoring And Diagnostics Or Turbo-Compressor Sets

PaperPg. 75-94.High speed turbomachinery plays a critical role in today's petrochemical industry. There are very high penalty costs associated with nonavailability and catastrophic failure of critical unspared trains. Additionally the fuel and maintenance costs over the life cycle of plant turbomachinery is very significant. Both of the above factors point to the need for health monitoring and diagnostic systems. The petrochemical industry has in the past placed a heavy emphasis on mechanical (vibration) analysis for both health monitoring and diagnostics. This paper presents a methodology in which both mechanical and aerothermal parameters are utilized for machinery health monitoring, prognosis and diagnosis

A Study of On-Line and Off-Line Turbine Washing to Optimize the Operation of a Gas Turbine

ABSTRACT This paper highlights the procedure followed in order to establish an effective on-line and off line water wash program on a fleet of 36 small industrial turbines. To determine the efficacy of water washing a program of tests under controlled conditions was organized. With proper condition monitoring techniques, a set of tests were developed in order to identify the proper water wash frequency and the dissolving agent used to water wash. The goal of the water wash program is to maximize turbine power, and efficiency; while minimizing maintenance labor, and material. The Gas Turbine Compressor Isentropic Efficiency, the overall heat rate, and the overall thermal efficiency were used to compare the tests and evaluate the performance of different water wash frequencies and solvents. 8760 points defined each test as the data was taken over a one year time period, at a one hour interval