scholarly journals Axial Compressor Deterioration Caused by Saltwater Ingestion

2005 ◽  
Author(s):  
Elisabet Syverud ◽  
Olaf Brekke ◽  
Lars E. Bakken
Keyword(s):  
Gas Turbine ◽  
Oil And Gas ◽  
Axial Compressor ◽  
Engine Performance ◽  
Economic Factor ◽  
Gas Production ◽  
Oil And Gas Production ◽  
Turbine Performance ◽  
Offshore Installations ◽  
Performance Deterioration

Gas turbine performance deterioration can be a major economic factor. An example is within offshore installations where a degradation of gas turbine performance can mean a reduction of oil and gas production. This paper describes the test results from a series of accelerated deterioration tests on a GE J85-13 jet engine. The axial compressor was deteriorated by spraying atomized droplets of saltwater into the engine intake. The paper also presents the overall engine performance deterioration as well as deteriorated stage characteristics. The results of laboratory analysis of the salt deposits are presented, providing insight into the increased surface roughness and the deposit thickness and distribution. The test data show good agreement with published stage characteristics and give valuable information regarding stage-by-stage performance deterioration.

scholarly journals Axial Compressor Deterioration Caused by Saltwater Ingestion

2007 ◽  
Vol 129 (1) ◽  
pp. 119-126 ◽  
Author(s):  
Elisabet Syverud ◽  
Olaf Brekke ◽  
Lars E. Bakken
Keyword(s):  
Gas Turbine ◽  
Oil And Gas ◽  
Axial Compressor ◽  
Engine Performance ◽  
Economic Factor ◽  
Gas Production ◽  
Oil And Gas Production ◽  
Turbine Performance ◽  
Offshore Installations ◽  
Performance Deterioration

Gas turbine performance deterioration can be a major economic factor. An example is within offshore installations where a degradation of gas turbine performance can mean a reduction of oil and gas production. This paper describes the test results from a series of accelerated deterioration tests on a General Electric J85-13 jet engine. The axial compressor was deteriorated by spraying atomized droplets of saltwater into the engine intake. The paper presents the overall engine performance deterioration as well as deteriorated stage characteristics. The results of laboratory analysis of the salt deposits are presented, providing insight into the increased surface roughness and the deposit thickness and distribution. The test data show good agreement with published stage characteristics and give valuable information regarding stage-by-stage performance deterioration.

Performance Deterioration of Intake Air Filters for Gas Turbines in Offshore Installations

2010 ◽  
Author(s):  
Olaf Brekke ◽  
Lars E. Bakken
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Oil And Gas ◽  
Operating Experience ◽  
Gas Production ◽  
Differential Pressure ◽  
Air Filtration ◽  
Turbine Inlet ◽  
Offshore Installations ◽  
Performance Deterioration

Efficient inlet air filtration is a key element for limiting fouling, erosion, and corrosion in the compressor section of offshore gas turbine installations. Current filtration systems are normally successful in preventing serious erosion and corrosion problems in the compressor section, but significant performance deterioration caused by compressor fouling still remains a challenge. This performance deterioration increases fuel consumption and emissions and has a particularly severe economic impact when it reduces oil and gas production. Operating experience from different offshore installations has shown that the deterioration rate in gas turbine performance increases when the turbines are operating in wet or humid weather and that the differential pressure loss over the intake system is affected by ambient humidity. An experimental test rig has been built in the laboratory at the Norwegian University of Science and Technology (NTNU) in order to increase understanding of the fundamentals related to gas turbine inlet air filtration. This paper presents the results from an experimental investigation of the performance of gas turbine inlet air filter elements that have been in operation offshore. Performance under both dry and wet conditions is assessed. Different types of filter elements show significantly different changes in differential pressure signature when exposed to moisture, and all of the tested filter elements demonstrate a loss of accumulated contamination after operating in wet conditions. Hence, contaminants originally accumulated by the filter elements are re-entrained into the airstream on the downstream side of the filters when they are exposed to moisture. The change in differential pressure signature as a result of operating in wet conditions demonstrates another weakness of solely applying differential pressure for condition monitoring of the filter system.

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.

Root cause analysis of failure of bolts in the low pressure section of a gas turbine in an oil and gas production plant

2020 ◽  
Vol 115 ◽  
pp. 104675
Author(s):  
M. Mousavinia ◽  
A. Bahrami ◽  
S.M. Rafiaei ◽  
M. Rajabinezhad ◽  
M. Taghian ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Oil And Gas ◽  
Root Cause Analysis ◽  
Low Pressure ◽  
Gas Production ◽  
Production Plant ◽  
Oil And Gas Production ◽  
Cause Analysis ◽  
Root Cause

Development, Testing, and Qualification of the Marine LM6000 Gas Turbine

2006 ◽  
Author(s):  
David Sidenstick ◽  
Glenn McAndrews ◽  
Ravi Tanwar ◽  
Scott Farley
Keyword(s):  
Gas Turbine ◽  
Oil And Gas ◽  
Aircraft Engine ◽  
Gas Production ◽  
Energy Prices ◽  
Oil And Gas Production ◽  
Global Environmental ◽  
Commercial Operation ◽  
Gas Pumping ◽  
Marine Applications

In 1990, GE announced it would begin development of the first-ever gas turbine with output greater than 40MW and a thermal efficiency above 40%. It was designated the LM6000, and was first introduced as the -PA model in December 1992. This turbine used a single annular combustion system with relatively few changes from the successful aircraft engine — the CF6-80C2. At the same time, GE began development of Dry Low Emissions (DLE) combustion technologies, culminating in the LM6000-PB model being introduced in December 1994. As the LM6000 fleet approached the 1 million-hour point, with an installed base of over 100 units, the next step — the development of a turbine with greater power and efficiency — was initiated, creating the LM6000-PC and -PD models. The launch of GE’s LM6000-PC/PD aero-derivative gas turbine was announced in 1996 and the first unit went into commercial operation in a power generation application in late 1997. The mechanical drive version of this gas turbine has been available as a product since early 1998. This machine opens an entirely new market segment, with interest being paced by the development of this segment requiring variable speed drivers with outputs greater than 50,000 shaft horsepower. Although some exploratory interest for mechanical drive applications was generated when the product was first announced, significantly greater interest within both gas pumping, and marine applications has been expressed recently especially considering changes in the global environmental regulations, energy prices, larger ships moving at greater speeds. Typical applications are new designs of large oil and gas production facilities — for gas pumping, processing, and natural gas liquefaction, as well as large marine and naval applications requiring high power-weight densities. GE is currently supporting several ongoing application studies using the LM6000 gas turbine as the driver of choice. This document provides the highlights of the development, testing and qualification of the LM6000 by General Electric as well as the certification program by the American Bureau of Shipping (ABS). Notable engineering accomplishments during this development include part power NOX abatement, auto-throttles, and cubic loading using a generator.

Technology Transfer

1997 ◽  
Author(s):  
G. Naisbitt ◽  
T. Alderton ◽  
C. Bruce
Keyword(s):  
Gas Turbine ◽  
Oil And Gas ◽  
Combustion Process ◽  
Thermal Spraying ◽  
High Energy ◽  
Gas Production ◽  
High Wear Resistance ◽  
Oil And Gas Production ◽  
Alternative Markets ◽  
Detonation Gun

Abstract High Velocity Oxy Fuel, (HVOF), is a high energy Thermal Spraying Combustion Process, producing high density coatings with hardness values in excess of 1200 VPN. Such coatings, using metal carbide spray material, are used extensively in the aerospace industry, in areas where high wear resistance is particularly important. The Linde Detonation Gun, CD-Gun'), has until recent times been the predominant system for applying these hard faced coatings. However, the advent of a number of new HVOF systems approximately 5 years ago, allowed Gas Turbine Repair and Overhaul bases the opportunity to offer a more competitive coating service, i.e. these "1st generation" HVOF systems allowed the development of comparable, if not superior coatings to these produced by the D-Gun. Having successfully developed and approved HVOF coatings for the use on Rolls-Royce Gas Turbine components for both Repair and New Manufacture, Rolls Wood Group addressed the problem of transferring HVOF technology from aerospace components to alternative markets, i.e. refurbishment of equipment used in Oil and Gas Production.

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