Testing an APU for Potential Service Aboard a U.S. Naval Destroyer

1994 ◽  
Author(s):  
George W. Francis
Keyword(s):  
High Pressure ◽  
Gas Turbine ◽  
Life Cycle Management ◽  
Signal Model ◽  
Turbine Generator ◽  
Auxiliary Power ◽  
Broad Array ◽  
Auxiliary Power Units ◽  
Generator Sets ◽  
Naval Surface Warfare

Incentives exist for replacing ships high pressure gas turbine emergency start air systems with auxiliary power units (APUs). The Allied Signal, Model GTCP 100-82 is one option. It is currently used in Naval aircraft start carts. Interest has been kindled in a shipboard application primarily for emergency starting Ship Service Gas Turbine Generator Sets. This APU is tested at the Naval Surface Warfare Center Carderock Division facility in Philadelphia. The target ships for this application is the future addition to the DDG-51 Class, AEGIS Destroyers. Advantages from both financial and life cycle management perspectives are expected from standardized air and sea service. This APU application concept, and variations of it, are overtly suited to a broad array of similar installations.

Inlet Air Salt Concentration Detection on U.S. Navy Ship Service Gas Turbine Generator Sets

2004 ◽  
Author(s):  
Daniel E. Caguiat ◽  
Jennifer Connor ◽  
Edward Duckless ◽  
Richard J. DeCorso
Keyword(s):  
Gas Turbine ◽  
Health Monitoring ◽  
Salt Concentration ◽  
Fiber Optic ◽  
Turbine Generator ◽  
System Health Monitoring ◽  
Filtration System ◽  
Lens Assembly ◽  
Generator Sets ◽  
Naval Surface Warfare

The Naval Surface Warfare Center, Carderock Division (NSWCCD) Gas Turbine Emerging Technologies Code 9334 has been working, in conjunction with Vibro-Meter Incorporated, to evaluate and further develop the Vibro-Meter Flame Contaminant Detector (FCD). This device has been used on various commercial gas turbine platforms to quantify the level of sodium entrained in fuel. The FCD consists of a spectrometer device, fiber optic cabling, and a lens assembly, which is mounted in an open combustor port. The combustion flame is continuously monitored for sodium wavelength intensity during gas turbine operation. The FCD was initially of interest to NSWCCD for use in fuel filtration system health monitoring. However, based on known Ship Service Gas Turbine Generator (SSGTG) hot section corrosion issues, it was believed that the FCD would also serve as useful tool for quantifying inlet air salt concentration. Testing was performed at the Philadelphia Land Based Engineering Site in 2003. It was determined that the FCD was able to detect salt concentrations as low as 0.003 parts per million. Initial indications are that airborne salt can be differentiated from fuel entrained salt based on continuous vs. intermittent sodium levels. Continuing efforts are centered on optimizing the existing FCD algorithm to properly differentiate between and quantify inlet air and fuel-entrained salt concentration.

scholarly journals Applying Auxiliary Power Unit Technology to Starting Ship’s Gas Turbines

1991 ◽  
Author(s):  
George W. Francis ◽  
Gordon W. Saby ◽  
Kevin A. Goom
Keyword(s):  
High Pressure ◽  
Gas Turbine ◽  
Systems Engineering ◽  
Gas Turbines ◽  
Test Site ◽  
Auxiliary Power Unit ◽  
Air Motor ◽  
Auxiliary Power ◽  
Auxiliary Power Units ◽  
Surface Combatant

Large shipboard gas turbines are traditionally started by means of an air motor (starter). In the absence of bleed air from another operating gas turbine, the starters are driven by stored high pressure air. Onboard gas turbine powered compressors, auxiliary power units (APUs) would offer improvements over using stored high pressure air for starting. Certain APUs have demonstrated extreme reliability in aircraft applications. However, the concept of APU use has not come to fruition on a U.S. Navy surface combatant. The focus of this paper is on an APU test done at the Naval Ship Systems Engineering Station’s (NAVSSES’s) gas turbine test site for DDG-51 Class destroyers. Since starting scenarios are similar among the U.S. Navy’s gas turbine ships, a potentially broad base exists for this application.

scholarly journals Natural Gas

2011 ◽  
Vol 133 (04) ◽  
pp. 52-52
Author(s):  
Rainer Kurz
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Oil And Gas ◽  
Electrical Power ◽  
Offshore Platforms ◽  
Electric Motors ◽  
Turbine Generator ◽  
Associated Gas ◽  
Generator Sets

This article discusses the importance of gas turbines, centrifugal compressors and pumps, and other turbomachines in processes that bring natural gas to the end users. To be useful, the natural gas coming from a large number of small wells has to be gathered. This process requires compression of the gas in several stages, before it is processed in a gas plant, where contaminants and heavier hydrocarbons are stripped from the gas. From the gas plant, the gas is recompressed and fed into a pipeline. In all these compression processes, centrifugal gas compressors driven by industrial gas turbines or electric motors play an important role. Turbomachines are used in a variety of applications for the production of oil and associated gas. For example, gas turbine generator sets often provide electrical power for offshore platforms or remote oil and gas fields. Offshore platforms have a large electrical demand, often requiring multiple large gas turbine generator sets. Similarly, centrifugal gas compressors, driven by gas turbines or by electric motors are the benchmark products to pump gas through pipelines, anywhere in the world.

scholarly journals Hydromechanical Fuel Control for Portable Gas Turbine Generator Sets

1968 ◽  
Author(s):  
G. E. Parker
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Production Cost ◽  
Light Weight ◽  
Turbine Generator ◽  
Design Problems ◽  
Ambient Temperatures ◽  
High Speeds ◽  
Wide Range ◽  
Generator Sets

Controls for small lightweight gas turbines present some unique design problems. The requirements for small size, light weight, ability to rotate at high speeds to save reduction gearing, and low production cost conflict with the requirements for reasonably accurate control of very small fuel flows and the scheduling of a wide range of hydrocarbon fuels over a wide range of ambient temperatures. This paper discusses in some detail the design of such a control and the satisfactory results obtained.

scholarly journals Gemini T-20G-8 XM1 Tank APU

1981 ◽  
Author(s):  
C. Rodgers ◽  
J. Zeno ◽  
E. A. Drury ◽  
A. Karchon
Keyword(s):  
Gas Turbine ◽  
Power Unit ◽  
Weather Conditions ◽  
Cold Weather ◽  
Turbine Engine ◽  
Auxiliary Power Unit ◽  
Auxiliary Power ◽  
Generator Sets ◽  
Main Engine ◽  
The U.S

Auxiliary power is often provided on combat vehicles in the U.S. Army for battery charging, operation of auxiliary vehicle equipment when the main engine is not running, or to provide assistance in starting the main engine in extreme cold weather conditions. The use of a gas turbine for these applications is particularly attractive, due to its small size and lightweight. In November 1978, the U.S. Army Tank-Automotive Research and Development Command, Warren, MI awarded a contract to the Turbomach Division of Solar Turbines International, San Diego, CA, for the development of a 10 kW 28 vdc gas turbine powered auxiliary power unit (APU) for installation in the XM1 main battle tank. This paper describes the general features of the Solar Turbomach T-20G-8 Auxiliary Power Unit, a single-shaft gas turbine driven generator set which has been developed under this contract. This APU is one of the family of Gemini powered APUs and is a derivative of the U.S. Army 10 kW gas turbine engine-driven, 60 and 400 Hz generator sets developed by Solar. The electrical components were newly developed for this particular application. Currently, the APU is in qualification testing both in the laboratory and in the XM1 main battle tank.

Improving Operational Availability of Gas Turbine Generators Aboard U.S. Navy DDG-51 Class Ships by Combining the Capabilities of the Integrated Condition Assessment System (ICAS) and the Generator Set’s Full Authority Digital Controller (FADC)

2005 ◽  
Author(s):  
Dennis M. Russom ◽  
Russell A. Leinbach ◽  
Helen J. Kozuhowski ◽  
Dana D. Golden
Keyword(s):  
Life Cycle ◽  
Gas Turbine ◽  
Condition Assessment ◽  
Assessment System ◽  
Digital Controller ◽  
Life Cycle Costs ◽  
Turbine Generator ◽  
Turbine Generators ◽  
Generator Sets ◽  
The U.S

Operational availability of Gas Turbine Generator Sets (GTGs) aboard the U.S. Navy’s DDG 51 Class ships is being enhanced through the combined capabilities of the ship’s Integrated Condition Assessment System (ICAS) and the GTG’s Full Authority Digital Control (FADC). This paper describes the ICAS and FADC systems; their current capabilities and the vision of how those capabilities will evolve in order to improve equipment readiness and reduce life cycle costs.

scholarly journals Power Dense Gas Turbine APUs

1985 ◽  
Author(s):  
Colin Rodgers
Keyword(s):  
Gas Turbine ◽  
System Performance ◽  
High Performance ◽  
Specific Power ◽  
Limited Capacity ◽  
Auxiliary Power ◽  
Auxiliary Power Units ◽  
Aircraft System ◽  
Swallowing Capacity ◽  
Secondary Power

Future high performance aircraft will require more compact, lighter weight, and self-sufficient secondary power equipment capable of faster starting and delivering high specific powers over wider operating envelopes of inlet temperatures and altitudes. Meeting these requirements may not be entirely compatible with improving thermal efficiency, particularly for the small air-breathing gas turbine since optimum cycle conditions differ for maximum specific power and specific fuel consumption. Further conflict lies in the necessity to provide faster start times with a limited capacity of stored on-board start energy, because compressor and turbine inertias must be minimized although compressor and turbine airflow-swallowing capacity must be maximized. This paper discusses the numerous design disciplines which constrain power density for small gas turbine auxiliary power units. Several potentially profitable development avenues are suggested for continuing the improvement of aircraft system performance.

Analysis of Gas Turbine Engines Auxiliary Power Units

2014 ◽  
Vol 533 ◽  
pp. 13-16
Author(s):  
Yu Yu Zuo
Keyword(s):  
Gas Turbine ◽  
Power Unit ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Turbine Engine ◽  
Ground Support ◽  
Auxiliary Power Unit ◽  
Aircraft Systems ◽  
Auxiliary Power ◽  
Auxiliary Power Units

As aircraft became more complex a need was created for a power source to operate the aircraft systems on the ground without the necessity for operating the aircrafts main engines. This became the task of the Auxiliary Power Unit (APU). The use of an APU on an aircraft also meant that the aircraft was not dependant on ground support equipment at an airfield. It can provide the necessary power for operation of the aircrafts Electrical, Hydraulic and Pneumatic systems. It should come as no surprise that the power unit selected to do this task is a Gas Turbine Engine.

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