A System for Health State Determination of Natural Gas Compression Gas Turbines

2001 ◽  
Author(s):  
R. Bettocchi ◽  
M. Pinelli ◽  
P. R. Spina ◽  
M. Venturini ◽  
S. Sebastianelli
Keyword(s):  
Natural Gas ◽  
Path Analysis ◽  
Gas Turbines ◽  
Diagnostic System ◽  
Health State ◽  
Compression System ◽  
Gas Compression ◽  
State Determination ◽  
System Maintenance

This paper illustrates the policy and objectives in compression system maintenance and describes a system for the health state determination of natural gas compression gas turbines based on “Gas Path Analysis”. Some results of the application of the diagnostic system to gas turbines working in a natural gas compression plant are presented.

scholarly journals Gas Turbine Health State Determination: Methodology Approach and Field Application

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Michele Pinelli ◽  
Pier Ruggero Spina ◽  
Mauro Venturini
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Field Measurements ◽  
Field Application ◽  
Diagnostic Process ◽  
Health State ◽  
Gas Compression ◽  
State Determination ◽  
Measurement Validation ◽  
Machine Health

A reduction of gas turbine maintenance costs, together with the increase in machine availability and the reduction of management costs, is usually expected when gas turbine preventive maintenance is performed in parallel to on-condition maintenance. However, on-condition maintenance requires up-to-date knowledge of the machine health state. The gas turbine health state can be determined by means of Gas Path Analysis (GPA) techniques, which allow the calculation of machine health state indices, starting from measurements taken on the machine. Since the GPA technique makes use of field measurements, the reliability of the diagnostic process also depends on measurement reliability. In this paper, a comprehensive approach for both the measurement validation and health state determination of gas turbines is discussed, and its application to a 5 MW gas turbine working in a natural gas compression plant is presented.

scholarly journals Non Invasive XRF Analysis of Human Hair for Health State Determination of Breast Tissue

2015 ◽  
Vol 8 (6) ◽  
Author(s):  
Asghar Maziar ◽  
Daryoush Shahbazi-Gahrouei ◽  
Mohammad Bagher Tavakoli ◽  
Vahid Changizi
Keyword(s):  
Human Hair ◽  
Breast Tissue ◽  
Health State ◽  
Xrf Analysis ◽  
Non Invasive ◽  
State Determination

scholarly journals Study on nitrogen barrier protection of an airend oil-free compressor bearings in H2 compression

2022 ◽  
Vol 354 ◽  
pp. 00047
Author(s):  
Iulian Vladuca ◽  
Emilia Georgiana Prisăcariu ◽  
Cosmin Petru Suciu ◽  
Cristian Dobromirescu ◽  
Răzvan Edmond Nicoară
Keyword(s):  
Natural Gas ◽  
Gas Turbines ◽  
Point Of View ◽  
Working Pressure ◽  
Gas Field ◽  
Gas Network ◽  
Gas Compression ◽  
Air Compression ◽  
Oil Injection ◽  
Injection Screw

The oil free compressors were specially designed for air compression. The National Research and Development Institute for Gas Turbines COMOTI gained a great deal of experience in producing/designing certified oil injection screw compressors for the natural gas field and for several years it has been focusing its research on the use of “dry” (oil-free) compressors in natural gas compression and more recently in hydrogen compression. Working with an explosive gas, one of an idea was to use a nitrogen barrier in oil bearing sealing, which are open source of gases in the atmosphere for such compressors. Worldwide, on-site nitrogen generators have been developed for a purity range of 95…99.5%, and that nitrogen can be supplied in any environment conditions. The present paper will address nitrogen flow with low percentage of oxygen for bearing sealing at the working pressure, the nitrogen consumption, ideas for H2 re-injection and the influence over the global efficiency of the process. Due to the Energy Strategy worldwide, and the studies regarding production, transport and storage of hydrogen in natural gas network, COMOTI has involved researches in developing such possibilities and to express a point of view in existing research in the newly created industry.

Fault Detection and Identification by Gas Path Analysis Approach in Heavy Duty Gas Turbine

2006 ◽  
Author(s):  
Stefania Della Gatta ◽  
Paolo Adami
Keyword(s):  
Path Analysis ◽  
Gas Turbine ◽  
Diagnostic System ◽  
Theoretical Background ◽  
Critical Discussion ◽  
Diagnostic Approach ◽  
Health State ◽  
Heavy Duty ◽  
Fault Detection And Identification ◽  
Heavy Duty Gas Turbine

The possibility to get information about gas turbine “health” state is largely based on availability and reliability of operational data and on-line acquisition systems. However, further instruments are needed in order to deduce useful information in maintenance scheduling from actually measured data. In Gas Path Analysis approaches, a model to simulate the engine behavior is required. Furthermore, in order to individuate, locate and evaluate faulty conditions, a diagnostic approach needs to be developed and introduced. This paper presents a critical discussion of the problem to highlight the main requirements of a diagnostic approach. Furthermore, some procedures to verify the ability of a diagnostic tool can be obtained directly from the theoretical background of GPA. To demonstrate how these procedures work, an application case has been examined. An engine model has been specifically developed for the monitored heavy-duty gas turbine. It allows to calculate thermodynamics data and to identify performance parameters through a mathematical modeling process. The suitability of this model to be introduced in a diagnostic system has been investigated. An exhaustive description of the procedures and discussion of results are reported.

Support for Operation Strategy in CHP Plants With Gas Turbines

2006 ◽  
Author(s):  
Gerard Kosman ◽  
Tadeusz Chmielniak ◽  
Wojciech Kosman
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Extended Period ◽  
Health State ◽  
Ambient Conditions ◽  
Operation Conditions ◽  
Thermal Measurements ◽  
Time Of Operation ◽  
Diagnostic Module

This paper presents procedure, which supports planning a strategy of operation, repairs and modernizations. Reliability and effectiveness are assumed to form the criteria for appropriate operation with a special attention to working costs. The procedure involves diagnostic analysis. Information derived from diagnostic may be utilized in many ways. It allows to determine losses, which derive from components wear or improper operation, and track the wear rate of machines components. This in turn allows to assess the losses, which appear in case of extended period between routine repairs. The most important application of the diagnostic results is the determination of the working costs for a CHP plant. It establishes a relation between the working costs of a gas turbine and its future time of operation. In addition it analyses the influence of the parameters independent of the gas turbine user (such as ambient conditions) on the operation and costs. The calculations presented in this paper involve a diagnostic module designed for uncooled and cooled gas turbines. The health state is assessed through a set of performance indices. Thermal measurements are the input data for the module, which may utilize even a small number of available measurements. The working costs create the basis for the procedure, which supports planning the strategy of operation and repairs. The procedure consists of several diagnostic rules. It draws conclusions from given premises. A premise includes a set of data, which involve among others working costs calculated according to health state. A conclusion indicates whether a further operation is possible and under what circumstances. The circumstances specify any required adjustments of the operation conditions or suggest an exchange or repair of some turbine components, which might be damaged.

Operating State Historical Data Analysis to Support Gas Turbine Malfunction Detection

2001 ◽  
Author(s):  
M. Pinelli ◽  
M. Venturini
Keyword(s):  
Gas Turbine ◽  
Field Measurements ◽  
Health State ◽  
Gas Compression ◽  
State Determination ◽  
First Results ◽  
Historical Data Analysis ◽  
On Line ◽  
Compressor Performance ◽  
Machine Health

Abstract The paper describes a methodology to determine gas turbine operating state based on the analysis of normalized field data. This methodology consists in normalizing measured value with respect to that expected, calculated in the actual boundary conditions and working point. The normalization procedure, if applied on line, provides useful information to support the machine Health State determination. In this paper, the methodology has been applied to field measurements taken on a 5 MW gas turbine running in a natural gas compression plant. The first results of field measurements analysis along a two year period are presented. Relations between compressor performance drops and the probable causes of malfunctioning have been identified. Some significant results are then presented.

Ejector Compression of Natural Gas for Small Turbines

1967 ◽  
Vol 182 (1) ◽  
pp. 449-462 ◽  
Author(s):  
G. Walker
Keyword(s):  
Natural Gas ◽  
Combustion Chamber ◽  
Thermal Efficiency ◽  
Gas Turbines ◽  
Cooling Water ◽  
Two Stage ◽  
Steam Consumption ◽  
Steam Content ◽  
Gas Compression ◽  
Steam Ejector

Natural-gas-fuelled total-energy systems for supplying the utility demands of residential and commercial buildings typically require 500 s.h.p. for the machinery drives. Although gas turbines are competitive prime movers in this size range, difficulties arise from the need to compress the natural gas fuel to the pressure of the turbine combustion chamber. In this study the use of non-condensing single-and two-stage steam-jet ejectors was analysed for gas compression to a pressure of 150 lb/in2. Steam-supply conditions from 5000 to 1000 lb/in2 and 800 to 1200°F were considered; methane was supplied at 15 lb/in2 and 60°F. The specific steam consumption (lb steam per lb gas) of a two-stage ejector was found to be much better than that of a single-stage ejector. The minimum specific steam consumption (6 lb steam per lb gas) occurred at the extreme steam conditions considered in the study. The steam-methane mixture this produced was not flammable when mixed in any proportion with air. Of several methods considered to reduce the steam content of the mixture delivered by the ejector, only one, post-ejector cooling and condensate removal, was suitable for analysis. Cooling-water flow rates in excess of 14 lb water per lb gas were necessary to produce potentially flammable mixtures. Estimates were made of the major effects on turbine engine performance arising from the use of a steam ejector for gas compression. A comparison was drawn for two idealized cycles and for two others in which realistic values of component efficiencies were included. In each series the gas was compressed by conventional means in one cycle and by means of a steam-jet ejector in the other. The steam injected with the methane in the turbine combustion chamber caused an appreciable decrease in the cycle temperatures and significant improvement in both the turbine output and thermal efficiency. When the additional heat input necessary to generate the steam for the ejector was included, the overall thermal efficiency of the steam-ejector cycle was less than that of the conventional cycle.

STEADY-STATE DETERMINATION OF FUEL-BOND NITROGEN IN DIESEL AND INDUSTRIAL GAS OIL

Clean Air ◽  
2007 ◽  
Vol 8 (4) ◽  
pp. 359-371
Author(s):  
A. Medeiros ◽  
R. Edenhofer ◽  
K. Lucka ◽  
H. Kohne
Keyword(s):  
Steady State ◽  
Gas Oil ◽  
State Determination
Sign in / Sign up

Export Citation Format

Share Document