Gas Turbine Retrofit With Modern Control Systems

1985 ◽  
Author(s):  
J. C. McMullen
Keyword(s):  
Control Systems ◽  
Gas Turbine ◽  
High Reliability ◽  
Attractive Alternative ◽  
Maintenance Planning ◽  
Operator Interface ◽  
Modern Control

The rapid advances in technology of control systems precipitated by the development of microprocessors has made retrofit of older type controls an attractive alternative for many gas turbine owners. High reliability, enhanced operator interface, and optimized maintenance planning are some of the tangible benefits that can accrue from these retrofits. The design and features of the new equipment are discussed, and some of the complexities of changing out control systems and their associated instrumentation in field units are reviewed.

User Interface Description of a Gas Turbine Control System

1986 ◽  
Author(s):  
M. Sreetharan ◽  
J. Fistere
Keyword(s):  
Control System ◽  
User Interface ◽  
Control Systems ◽  
Gas Turbine ◽  
Video Display ◽  
Diagnostic Features ◽  
Control Interface ◽  
Operator Interface ◽  
Made In ◽  
Plant Control

Human factors must be given primary consideration in the design of today’s control systems. It is essential to take into account the characteristics of the human operator, the plant control requirements and the inherent characteristics of the control system. This paper discusses the objectives of the control interface development task for a turbomachinery microprocessor based control system. It discusses the design issues raised during development, the choices made in the early structuring of the system and selected implementation details that affect the operator interface. Subjects discussed include: • Overall Philosophy and Console Arrangement • Pushbutton vs Keyboard Functions • Video Display Philosophy and Organization • Ladder-Diagram Graphic Symbols • Keyboard Command Philosophy and Structure • Diagnostic Features and Maintainability

scholarly journals Retrofit of a Modern Control System on an Early Design Gas Turbine

1987 ◽  
Author(s):  
H. Nikkels ◽  
D. Little
Keyword(s):  
Control System ◽  
Control Systems ◽  
Gas Turbine ◽  
Timely Manner ◽  
Early Design ◽  
Common Experience ◽  
Modern Control

The control systems on many older combustion turbines are often directly responsible for poor first-start reliability, low availability and high forced-outage rates. Indirectly, they may be the cause of mechanical and metallurgical problems. Dealing with aging control systems is a common experience for most turbine users and sometimes results in the premature retirement of equipment. The retrofit of a modern control system offers many advantages to the turbine user if it can be accomplished in an economic and timely manner. The significant logistics, engineering, installation and commercial aspects of installing a modern control system on a 24-year old combustion turbine are described in this paper. The unit was restored to service with the new control system in early 1986, and the project was considered a success.

Advanced Aircraft Gas Turbine Engine Controls

1990 ◽  
Vol 112 (4) ◽  
pp. 561-564 ◽  
Author(s):  
W. E. Wright ◽  
J. C. Hall
Keyword(s):  
Control Systems ◽  
Gas Turbine ◽  
Flight Control ◽  
Fault Tolerant ◽  
High Reliability ◽  
Control Architecture ◽  
Engine Control ◽  
Turbine Engine ◽  
Vertical Lift ◽  
Vectored Thrust

With the advent of vectored thrust, vertical lift, and fly-by-wire aircraft, the complexity of aircraft gas turbine control systems has evolved to the point wherein they must approach or equal the reliability of current quad redundant flight control systems. To advance the technology of high-reliability engine controls, one solution to the Byzantine General’s problem (Lamport et al., 1982) is presented as the foundation for fault tolerant engine control architecture. In addition to creating a control architecture, an approach to managing the architecture’s redundancy is addressed.

scholarly journals Ways to improve the efficiency of regulation of biomass concentration using modern control systems

2021 ◽  
Vol 640 (7) ◽  
pp. 072013
Author(s):  
I A Avtsinov ◽  
A N Gavrilov ◽  
N V Sukhanova ◽  
Yu E Kozhevnikov ◽  
S A Nickel ◽  
...  
Keyword(s):  
Control Systems ◽  
Biomass Concentration ◽  
Modern Control

A New Concept of High-Performance Marine Reversing Reduction Gears

1988 ◽  
Vol 110 (4) ◽  
pp. 572-577
Author(s):  
D. J. Folenta
Keyword(s):  
Gas Turbine ◽  
High Performance ◽  
Power Transmission ◽  
High Reliability ◽  
Mechanical Efficiency ◽  
Gas Turbine Engine ◽  
Turbine Engines ◽  
Turbine Engine ◽  
Epicyclic Gear ◽  
Gear Technology

This paper presents a brief description and several illustrations of a new concept of marine reversing gears that utilize high-performance differentially driven epicyclic gear arrangements. This new marine power transmission has the potential to offer high reliability, simplicity, light weight, high mechanical efficiency, compactness, and technological compatibility with aircraft derivative marine gas turbine engines. Further, this new reversing gear minimizes the danger of driving the free turbine in reverse as might be the case with conventional parallel shaft reversing gear arrangements. To illustrate the weight reduction potential, a modern naval ship propulsion system utilizing an aircraft derivative gas turbine engine as the prime mover in conjunction with a conventional parallel shaft reversing gear can be compared to the subject reversing gear differential. A typical 18,642 kW (25,000 hp) marine gas turbine engine might weigh approximately 5000 kg (11,000 lb) and a conventional marine technology parallel shaft reversing gear might weigh on the order of 90,000 to 136,000 kg (200,000 to 300,000 lb). Using gear technology derived from the aircraft industry, a functionally similar differentially driven marine reversing gear might weigh approximately 13,600 kg (30,000 lb).

Second Paper: Failure-Survival Automatic Flight Control Systems for Aircraft with Particular Reference to a High Reliability Electrohydraulic Actuator

1965 ◽  
Vol 180 (1) ◽  
pp. 246-259
Author(s):  
R. Ruggles
Keyword(s):  
Control System ◽  
Control Systems ◽  
Flight Control ◽  
High Reliability ◽  
Supply System ◽  
Design Criteria ◽  
Flight Control System ◽  
Advantages And Disadvantages ◽  
System Configurations ◽  
Very High

The author discusses some of the problems of failure-survival automatic flight control systems and suggests some basic ground rules as design criteria. The advantages and disadvantages of some of the main types of system are discussed: duplex, triplex, triple component, duplicate-monitored and quadruplex systems being covered. In particular, a quadruplex actuator is described which has been designed and developed mainly for automatic flight control system applications where a very high degrees of failure-survival capability is required. A detailed failure analysis of the various systems is carried out and the importance of the electrical and hydraulic supply system configurations and failure rates is brought out.

Numerical Simulation of Gas Flow and Heat Transfer in Cross-Wavy Primary Surface Channel for Microtubine Recuperators

2005 ◽  
Author(s):  
H. X. Liang ◽  
Q. W. Wang ◽  
L. Q. Luo ◽  
Z. P. Feng
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Gas Turbine ◽  
Numerical Study ◽  
High Reliability ◽  
Three Dimensional ◽  
Operating Conditions ◽  
Flow And Heat Transfer ◽  
High Heat Transfer ◽  
The Cross

Three-dimensional numerical simulation was conducted to investigate the flow field and heat transfer performance of the Cross-Wavy Primary Surface (CWPS) recuperators for microturbines. Using high-effective compact recuperators to achieve high thermal efficiency is one of the key techniques in the development of microturbine in recent years. Recuperators need to have minimum volume and weight, high reliability and durability. Most important of all, they need to have high thermal-effectiveness and low pressure-losses so that the gas turbine system can achieve high thermal performances. These requirements have attracted some research efforts in designing and implementing low-cost and compact recuperators for gas turbine engines recently. One of the promising techniques to achieve this goal is the so-called primary surface channels with small hydraulic dimensions. In this paper, we conducted a three-dimensional numerical study of flow and heat transfer for the Cross-Wavy Primary Surface (CWPS) channels with two different geometries. In the CWPS configurations the secondary flow is created by means of curved and interrupted surfaces, which may disturb the thermal boundary layers and thus improve the thermal performances of the channels. To facilitate comparison, we chose the identical hydraulic diameters for the above four CWPS channels. Since our experiments on real recuperators showed that the Reynolds number ranges from 150 to 500 under the operating conditions, we implemented all the simulations under laminar flow situations. By analyzing the correlations of Nusselt numbers and friction factors vs. Reynolds numbers of the four CWPS channels, we found that the CWPS channels have superior and comprehensive thermal performance with high compactness, i.e., high heat transfer area to volume ratio, indicating excellent commercialized application in the compact recuperators.

Bench Scale Testing of Low-NOx LBG Combustors

1982 ◽  
Vol 104 (1) ◽  
pp. 120-128 ◽  
Author(s):  
W. D. Clark ◽  
B. A. Folsom ◽  
W. R. Seeker ◽  
C. W. Courtney
Keyword(s):  
Gas Turbine ◽  
Residence Time ◽  
Attractive Alternative ◽  
Nox Emissions ◽  
Catalytic Reactor ◽  
Power Cycle ◽  
Bench Scale ◽  
Gasification Process ◽  
Stirred Reactor ◽  
Catalytic Reformer

The high efficiencies obtained in a combined gas-turbine/steam-turbine power cycle burning low Btu gas (LBG) make it a potentially attractive alternative to the high sulfur emitting direct coal-fired steam cycle. In the gasification process, much of the bound nitrogen in coal is converted to ammonia in the LBG. This ammonia is largely converted to nitrogen oxides (NOx) in conventional combustors. This paper examines the pressurized bench scale performance of reactors previously demonstrated to produce low NOx emissions in atmospheric laboratory scale experiments. LBG was synthesized in a catalytic reformer and fired in three reactors: a catalytic reactor, a diffusion flame, and a stirred reactor. Effects of scale, pressure, stoichiometry, residence time, and preheat were examined. Lowest NOx emissions were produced in a rich/lean series staged catalytic reactor.

LV100 AIPS Technology—For Future Army Propulsion

1992 ◽  
Author(s):  
Walter Brockett ◽  
Angelo Koschier
Keyword(s):  
Control Systems ◽  
Gas Turbine ◽  
Fuel Consumption ◽  
Cooling System ◽  
Gas Turbine Engine ◽  
Air Filtration ◽  
Turbine Engine ◽  
Overall Design ◽  
Armored Vehicle ◽  
And Control

The overall design of and Advanced Integrated Propulsion System (AIPS), powered by an LV100 gas turbine engine, is presented along with major test accomplishments. AIPS was a demonstrator program that included design, fabrication, and test of an advanced rear drive powerpack for application in a future heavy armored vehicle (54.4 tonnes gross weight). The AIPS design achieved significant improvements in volume, performance, fuel consumption, reliability/durability, weight and signature reduction. Major components of AIPS included the recuperated LV100 turbine engine, a hydrokinetic transmission, final drives, self-cleaning air filtration (SCAF), cooling system, signature reduction systems, electrical and hydraulic components, and control systems with diagnostics/prognostics and maintainability features.

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