Development of a Simplified Back-Up Liquid Fuel System for a Heavy Duty Industrial Gas Turbine

2012 ◽  
Author(s):  
Alessandro Zucca ◽  
Antonio Asti ◽  
Andrei Evulet ◽  
Sergey Khayrulin ◽  
Borys Shershnyov ◽  
...  
Keyword(s):  
Gas Turbines ◽  
Liquid Fuel ◽  
High Efficiency ◽  
Fuel Injection ◽  
Operating Cost ◽  
Injection System ◽  
Fuel System ◽  
Heavy Duty ◽  
Fuel Gas ◽  
Industrial Gas Turbines

Heavy duty gas turbines for power generation and mechanical drive applications are typically fired on natural gas as a primary fuel, providing heat and power with high efficiency and low exhaust emissions. However, fuel gas is not always available when power is needed, and distillate oil is often employed as an easily stored and handled back-up fuel. The present paper describes the development and initial component validation testing of a new, simplified liquid fuel injection system that will provide a back-up liquid fuel option for dry, low NOx combustion systems used in heavy duty industrial gas turbines. This new liquid fuel system offers reduced initial cost and operating cost, lower NOx emissions, and reduced water consumption relative to current technology. Spray test, sub-component ignition test, and full-scale combustion chamber test results will be discussed.

Fuel System Suitability Considerations for Industrial Gas Turbines

2004 ◽  
Vol 126 (1) ◽  
pp. 119-126 ◽  
Author(s):  
F. G. Elliott ◽  
R. Kurz ◽  
C. Etheridge ◽  
J. P. O’Connell
Keyword(s):  
Gas Turbines ◽  
Equations Of State ◽  
Dew Point ◽  
Liquid Fuels ◽  
Physical Parameters ◽  
Special Focus ◽  
Fuel System ◽  
Fuel Gas ◽  
Pressure Drops ◽  
Industrial Gas Turbines

Industrial Gas Turbines allow operation with a wide variety of gaseous and liquid fuels. To determine the suitability for operation with a gas fuel system, various physical parameters of the proposed fuel need to be determined: heating value, dew point, Joule-Thompson coefficient, Wobbe Index, and others. This paper describes an approach to provide a consistent treatment for determining the above physical properties. Special focus is given to the problem of determining the dew point of the potential fuel gas at various pressure levels. A dew point calculation using appropriate equations of state is described, and results are presented. In particular the treatment of heavier hydrocarbons, and water is addressed and recommendations about the necessary data input are made. Since any fuel gas system causes pressure drops in the fuel gas, the temperature reduction due to the Joule-Thompson effect has to be considered and quantified. Suggestions about how to approach fuel suitability questions during the project development and construction phase, as well as in operation are made.

Development and Integration of the Dual Fuel Combustion System for the MGT Gas Turbine Family

2021 ◽  
Author(s):  
Bernhard Ćosić ◽  
Frank Reiss ◽  
Marc Blümer ◽  
Christian Frekers ◽  
Franklin Genin ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Distribution System ◽  
Gas Turbines ◽  
Liquid Fuel ◽  
Fuel Injection ◽  
Liquid Fuels ◽  
Dual Fuel ◽  
Gaseous Fuels ◽  
Supply And Distribution ◽  
Industrial Gas Turbines

Abstract Industrial gas turbines like the MGT6000 are often operated as power supply or as mechanical drives. In these applications, liquid fuels like 'Diesel Fuel No.2' can be used either as main fuel or as backup fuel if natural gas is not reliably available. The MAN Gas Turbines (MGT) operate with the Advanced Can Combustion (ACC) system, which is capable of ultra-low NOx emissions for gaseous fuels. This system has been further developed to provide dry dual fuel capability. In the present paper, we describe the design and detailed experimental validation process of the liquid fuel injection, and its integration into the gas turbine package. A central lance with an integrated two-stage nozzle is employed as a liquid pilot stage, enabling ignition and start-up of the engine on liquid fuel only. The pilot stage is continuously operated, whereas the bulk of the liquid fuel is injected through the premixed combustor stage. The premixed stage comprises a set of four decentralized nozzles based on fluidic oscillator atomizers, wherein atomization of the liquid fuel is achieved through self-induced oscillations. We present results illustrating the spray, hydrodynamic, and emission performance of the injectors. Extensive testing of the burner at atmospheric and full load high-pressure conditions has been performed, before verification within full engine tests. We show the design of the fuel supply and distribution system. Finally, we discuss the integration of the dual fuel system into the standard gas turbine package of the MGT6000.

Fuel System Suitability Considerations for Industrial Gas Turbines

2002 ◽  
Author(s):  
F. G. Elliott ◽  
R. Kurz ◽  
C. Etheridge ◽  
J. P. O’Connell
Keyword(s):  
Gas Turbines ◽  
Equations Of State ◽  
Dew Point ◽  
Liquid Fuels ◽  
Physical Parameters ◽  
Special Focus ◽  
Fuel System ◽  
Fuel Gas ◽  
Pressure Drops ◽  
Industrial Gas Turbines

Industrial Gas Turbines allow operation with a wide variety of gaseous and liquid fuels. To determine the suitability for operation with a gas fuel system, various physical parameters of the proposed fuel need to be determined: Heating value, dew point, Joule-Thompson coefficient, Wobbe Index and others. This paper describes an approach to provide a consistent treatment for determining the above physical properties. Special focus is given to the problem of determining the dew point of the potential fuel gas at various pressure levels. A dew point calculation using appropriate equations of state is described, and results are presented. In particular the treatment of heavier hydrocarbons, and water is addressed and recommendations about the necessary data input are made. Since any fuel gas system causes pressure drops in the fuel gas, the temperature reduction due to the Joule-Thompson effect has to be considered and quantified. Suggestions about how to approach fuel suitability questions during the project development and construction phase, as well as in operation are made.

Development of a Dual-Fuel Injection System for Lean Premixed Industrial Gas Turbines

1996 ◽  
Author(s):  
Luke H. Cowell ◽  
Amjad Rajput ◽  
Douglas C. Rawlins
Keyword(s):  
Natural Gas ◽  
Gas Turbines ◽  
Liquid Fuel ◽  
Fuel Injection ◽  
Premixed Combustion ◽  
Injection System ◽  
Fuel Injection System ◽  
Load Range ◽  
Lean Premixed Combustion ◽  
Lean Premixed

A fuel injection system for industrial gas turbine engines capable of using natural gas and liquid fuel in dry, lean premixed combustion is under development to significantly reduce NOx and CO emissions. The program has resulted in a design capable of operating on DF#2 over the 80 to 100% engine load range meeting the current TA LUFT regulations of 96 ppm (dry, @ 15% O2) NOx and 78 ppm CO. When operating on natural gas the design meets the guaranteed levels of 25 ppm NOx and 50 ppm CO. The design approach is to apply lean premixed combustion technology to liquid fuel. Both injector designs introduce the majority of the diesel fuel via airblast alomization into a premixing passage where fuel vaporization and air-fuel premixing occur. Secondary fuel injection occurs through a pilot fuel passage which operates in a partially premixed mode. Development is completed through injector modeling, flow visualization, combustion rig testing, and engine testing. The prototype design tested in development engine environments has operated with NOx emissions below 65 ppm and 20 ppm CO at full load. This paper includes a detailed discussion of the injector design and qualification testing completed on this development hardware.

scholarly journals Conversion of Liquid to Gaseous Fuel for Prevaporised Premixed Combustion in Gas Turbines

1997 ◽  
Author(s):  
Y. Wang ◽  
L. Reh ◽  
D. Pennell ◽  
D. Winkler ◽  
K. Döbbeling
Keyword(s):  
High Pressure ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Liquid Fuel ◽  
Fuel Injection ◽  
Premixed Combustion ◽  
Fuel Oil ◽  
Injection System ◽  
Nox Emissions ◽  
Combustion Tests

Stationary gas turbines for power generation are increasingly being equipped with low emission burners. By applying lean premixed combustion techniques for gaseous fuels both NOx and CO emissions can be reduced to extremely low levels (NOx emissions <25vppm, CO emissions <10vppm). Likewise, if analogous premix techniques can be applied to liquid fuels (diesel oil, Oil No.2, etc.) in gas-fired burners, similar low level emissions when burning oils are possible. For gas turbines which operate with liquid fuel or in dual fuel operation, VPL (Vaporised Premixed Lean)-combustion is essential for obtaining minimal NOx-emissions. An option is to vaporise the liquid fuel in a separate fuel vaporiser and subsequently supply the fuel vapour to the natural gas fuel injection system; this has not been investigated for gas turbine combustion in the past. This paper presents experimental results of atmospheric and high-pressure combustion tests using research premix burners running on vaporised liquid fuel. The following processes were investigated: • evaporation and partial decomposition of the liquid fuel (Oil No.2); • utilisation of low pressure exhaust gases to externally heat the high pressure fuel vaporiser; • operation of ABB premix-burners (EV burners) with vaporised Oil No.2; • combustion characteristics at pressures up to 25bar. Atmospheric VPL-combustion tests using Oil No.2 in ABB EV-burners under simulated gas turbine conditions have successfully produced emissions of NOx below 20vppm and of CO below 10vppm (corrected to 15% O2). 5vppm of these NOx values result from fuel bound nitrogen. Little dependence of these emissions on combustion pressure bas been observed. The techniques employed also ensured combustion with a stable non luminous (blue) flame during transition from gaseous to vaporised fuel. Additionally, no soot accumulation was detectable during combustion.

Enhanced Application and Emission Control Possibilities With Electronically Controlled Low Speed Diesels

2004 ◽  
Author(s):  
Ole Gro̸ne ◽  
Kjeld Aabo ◽  
Peter Skjoldager
Keyword(s):  
Gas Turbines ◽  
High Efficiency ◽  
Fuel Injection ◽  
High Reliability ◽  
Emission Control ◽  
Steam Turbines ◽  
Fuel Gas ◽  
Low Speed ◽  
Medium Speed ◽  
Full Power

Two-stroke low speed diesels dominate the main propulsion engine market, being selected for nearly 80% of all ocean-going vessels. The main reason is the simplicity of the direct-coupled installation, the high reliability and the high thermal efficiencies. Four-stroke medium speed engines take the last 20%, except on the LNG carrier propulsion field where steam turbines, while being threatened, still prevail. The occasional exception to the above is a few gas turbines in passenger (cruise) vessels. Recently, two-stroke low speed diesels have been developed for electronically controlled fuel injection systems, and such engines are now gaining momentum in the industry. The electronically (rather than cam) controlled fuel injection systems bring with it many operational benefits, which will be outlined in the paper. One such feature is the ability to inject very small fuel amounts safely through the same injectors as those able for full power operation. This paves the way for a more simple and safe version of large low speed dual fuel gas engines for propulsion of LNG carriers, representing significant fuel and gas saving possibilities, reducing CO2 emissions, and also opening new frontiers for low emission high-efficiency ship propulsion systems in other vessel types, including the largest types, as well as land based power generation. The paper will outline the technology, especially with a view of emission control and its economical and environmental potential.

Verification of Single Digit Emission Performance of a 24 MW Gas Turbine: SGT-600 3rd Generation DLE

2017 ◽  
Author(s):  
Arturo Manrique Carrera ◽  
Philipp Geipel ◽  
Anders Larsson ◽  
Rikard Magnusson
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Liquid Fuel ◽  
Fuel Injection ◽  
Injection System ◽  
Combustion System ◽  
Single Digit ◽  
2Nd Generation ◽  
Droplet Distribution ◽  
Industrial Gas Turbine

The SGT-600 3rd generation DLE is a 24 MW industrial gas turbine which was recently upgraded from the SGT-600 2nd generation DLE. The upgraded SGT-600 is an addition to the existing low emissions gas turbine portfolio within Siemens. The objectives of the engine upgrade focused on increasing the lifetime of the components, lowering emissions and improving liquid fuel operation. In order to accomplish these objectives the combustion system was fully replaced, an improved gas fuel distribution was implemented and the first stage of the turbine was replaced. Furthermore, the liquid fuel injection system was enhanced in terms of fuel droplet distribution. Both gas and liquid fuel operation were confirmed in Siemens industrial gas turbine test facility located in Finspong, Sweden. The upgraded combustion system originates from the SGT-700 gas turbine, a 33MW class engine, which consists of 18 “3rd generation DLE” burners that replaced the original “2nd generation DLE” ones that are normally incorporated in the SGT-600 DLE gas turbines. The first stage of the turbine has also been improved and less air is needed for cooling purposes. Moreover, an additional update on the compressor air bleed control was implemented. The liquid fuel burner hardware was optimized with new fuel injection lances manufactured by electron erosion techniques in order to improve the droplet distribution. The SGT-600 3rd generation DLE is capable to operate in single digit conditions both in NOx and CO from 100% to 70% load and it is possible to extend single digit operation on NOx down to 50% load. CO emissions are below 80ppm at 50% load which is in compliance with current European regulation. Concerning liquid fuel operation the SGT-600 3rd generation DLE does not use water injection for emission control and is capable to reach below 58ppm NOx at full load while keeping CO below 40ppm down to 75% load. The present work describes the main modifications performed during the engine upgrade and the results of the performed engine tests. Finally, it should be noted that the SGT-600 3rd generation DLE is an excellent example of the development/upgrade efforts within Siemens AG. The commercialization process of the SGT-600 3rd generation DLE has been initiated and three engines are already in commercial operation up to date, and two units will be installed in the near future.

scholarly journals Field Evaluation of On-Line Compressor Cleaning in Heavy Duty Industrial Gas Turbines

1990 ◽  
Author(s):  
Gary L. Haub ◽  
William E. Hauhe
Keyword(s):  
Gas Turbines ◽  
Cost Effective ◽  
Field Evaluation ◽  
Injection System ◽  
Heavy Duty ◽  
Performance Loss ◽  
Cost Effective Method ◽  
Industrial Gas Turbines ◽  
On Line ◽  
Optimum Cost

On-line compressor cleaning of heavy duty gas turbines in industrial cogeneration service has proven to be a cost effective method of reducing the rate of performance loss associated with compressor fouling. By selecting an injection system, and by varying the dosage, frequency, and cleaning products used, an optimum cost effective method can be achieved. This paper evaluates the online compressor cleaning system at two 300 Mw cogeneration plants (8 gas turbines) that have been using this system since 1986.

Investigation of Failures in Gas Turbines: Part 1 — Techniques and Principles of Failure Investigation

1993 ◽  
Author(s):  
Robert E. Dundas
Keyword(s):  
Gas Turbines ◽  
Heavy Duty ◽  
Case Histories ◽  
Logical Approach ◽  
Failure Investigation ◽  
Industrial Gas Turbines ◽  
The One ◽  
Aircraft Accident

This paper is Part 1 of a two-part paper on the principles and methods of failure investigation in gas turbines. The qualities of a successful failure investigator are presented, and the most efficacious approaches to an investigation are discussed. An example of an aircraft accident that might have been avoided is used to support the necessity for thorough and conclusive investigations into failures. Two case histories involving heavy-duty industrial gas turbines are described to demonstrate different aspects of the logical approach to construction of hypotheses and the determination of the essential cause of a failure — the one event without which the failure would not have occurred.

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