Intercooled/Recuperated Shipboard Generator Drive Engine

1986 ◽  
Author(s):  
R. G. Mills ◽  
K. W. Karstensen
Keyword(s):  
Gas Turbine ◽  
Fuel Consumption ◽  
Gas Turbines ◽  
Electrical Power ◽  
Specific Fuel Consumption ◽  
Fire Control ◽  
Load Range ◽  
Light Load ◽  
Power Turbine ◽  
Variable Power

Adverse consequences of losing electrical power to complex electronic and fire control equipment, or of the sudden variations of shore power, cause naval combatants to operate two generators most of the time, each at light load where specific fuel consumption of simple-cycle gas turbines is particularly high. The recuperated gas turbine with variable power-turbine nozzles has a much better specific fuel consumption, especially at part load. Herein described is a compact recuperated gas turbine with variable power-turbine nozzles designed for marine and industrial use, suitable with or without intercooling. These features yield a specific fuel consumption that is comparable to marine diesels used for generator drive, and essentially flat across the entire usable load range.

A Variable-Geometry Power Turbine for Marine Gas Turbines

1989 ◽  
Author(s):  
Karl W. Karstensen ◽  
Jesse O. Wiggins
Keyword(s):  
Fuel Consumption ◽  
Gas Turbines ◽  
Part Load ◽  
Surface Ship ◽  
Marine Propulsion ◽  
Medium Speed ◽  
Power Turbine ◽  
Wide Range ◽  
Electrical Generator ◽  
Variable Power

Gas turbines have been accepted in naval surface ship applications, and considerable effort has been made to improve their fuel consumption, particularly at part-load operation. This is an important parameter for shipboard engines because both propulsion and electrical-generator engines spend most of their lives operating at off-design power. An effective way to improve part-load efficiency of recuperated gas turbines is by using a variable power turbine nozzle. This paper discusses the successful use of variable power turbine nozzles in several applications in a family of engines developed for vehicular, industrial, and marine use. These engines incorporate a variable power turbine nozzle and primary surface recuperator to yield specific fuel consumption that rivals that of medium speed diesels. The paper concentrates on the experience with the variable nozzle, tracing its derivation from an existing fixed vane nozzle and its use across a wide range of engine sizes and applications. Emphasis is placed on its potential in marine propulsion and auxiliary gas turbines.

Rolls Royce/Allison 501-K Gas Turbine Anti-Fouling Compressor Coatings Evaluation

2002 ◽  
Author(s):  
Daniel E. Caguiat
Keyword(s):  
Gas Turbine ◽  
Fuel Consumption ◽  
Gas Turbines ◽  
Performance Degradation ◽  
Specific Fuel Consumption ◽  
Inlet Temperature ◽  
Test Results ◽  
Turbine Inlet ◽  
Compressor Performance ◽  
Compressor Efficiency

The Naval Surface Warfare Center, Carderock Division (NSWCCD) Gas Turbine Emerging Technologies Code 9334 was tasked by NSWCCD Shipboard Energy Office Code 859 to research and evaluate fouling resistant compressor coatings for Rolls Royce Allison 501-K Series gas turbines. The objective of these tests was to investigate the feasibility of reducing the rate of compressor fouling degradation and associated rate of specific fuel consumption (SFC) increase through the application of anti-fouling coatings. Code 9334 conducted a market investigation and selected coatings that best fit the test objective. The coatings selected were Sermalon for compressor stages 1 and 2 and Sermaflow S4000 for the remaining 12 compressor stages. Both coatings are manufactured by Sermatech International, are intended to substantially decrease blade surface roughness, have inert top layers, and contain an anti-corrosive aluminum-ceramic base coat. Sermalon contains a Polytetrafluoroethylene (PTFE) topcoat, a substance similar to Teflon, for added fouling resistance. Tests were conducted at the Philadelphia Land Based Engineering Site (LBES). Testing was first performed on the existing LBES 501-K17 gas turbine, which had a non-coated compressor. The compressor was then replaced by a coated compressor and the test was repeated. The test plan consisted of injecting a known amount of salt solution into the gas turbine inlet while gathering compressor performance degradation and fuel economy data for 0, 500, 1000, and 1250 KW generator load levels. This method facilitated a direct comparison of compressor degradation trends for the coated and non-coated compressors operating with the same turbine section, thereby reducing the number of variables involved. The collected data for turbine inlet, temperature, compressor efficiency, and fuel consumption were plotted as a percentage of the baseline conditions for each compressor. The results of each plot show a decrease in the rates of compressor degradation and SFC increase for the coated compressor compared to the non-coated compressor. Overall test results show that it is feasible to utilize anti-fouling compressor coatings to reduce the rate of specific fuel consumption increase associated with compressor performance degradation.

A Variable-Geometry Power Turbine for Marine Gas Turbines

1990 ◽  
Vol 112 (2) ◽  
pp. 165-174 ◽  
Author(s):  
K. W. Karstensen ◽  
J. O. Wiggins
Keyword(s):  
Fuel Consumption ◽  
Gas Turbines ◽  
Part Load ◽  
Surface Ship ◽  
Marine Propulsion ◽  
Medium Speed ◽  
Power Turbine ◽  
Wide Range ◽  
Electrical Generator ◽  
Variable Power

Gas turbines have been accepted in naval surface ship applications, and considerable effort has been made to improve their fuel consumption, particularly at part-load operation. This is an important parameter for shipboard engines because both propulsion and electrical-generator engines spend most of their lives operating at off-design power. An effective way to improve part-load efficiency of recuperated gas turbines is by using a variable power turbine nozzle. This paper discusses the successful use of variable power turbine nozzles in several applications in a family of engines developed for vehicular, industrial, and marine use. These engines incorporate a variable power turbine nozzle and primary surface recuperator to yield specific fuel consumption that rivals that of medium speed diesels. The paper concentrates on the experience with the variable nozzle, tracing its derivation from an existing fixed vane nozzle and its use across a wide range of engine sizes and applications. Emphasis is placed on its potential in marine propulsion and auxiliary gas turbines.

scholarly journals Analysis of Ambient Temperature Effect on Gas Turbine Centaur 40 at Sepinggan Production Field, Chevron Indonesia Company

2019 ◽  
Vol 3 (2) ◽  
pp. 29
Author(s):  
Muhammad Adib
Keyword(s):  
Ambient Temperature ◽  
Gas Turbine ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Gas Flow ◽  
Specific Fuel Consumption ◽  
Ambient Temperatures ◽  
Optimal Output ◽  
Power Turbine ◽  
Calculation Results

               Gas turbine Centaur 40 drive gas compressor operates 24 hours a day and continuously with monitored output parameters, namely pressure and the gas flow capacity In its operation, it is often found that the optimal output parameters are generated during low ambient temperatures, for example in the night, cloudy and rainy. This study is aimed to determine the effect of changes in ambient temperature on the gas turbine power. During operation and research was done, the independent variable used is ambient temperature at 24 – 33 0C at constant 100% rotation of the turbine shaft. The decrease in gas turbine performance is seen from the increase in Specific Fuel Consumption (SFC), a decrease in the power produced and thermal efficiency. Specific fuel consumption value from the calculation results is 0.06072 kg/kW.h at 24 0C ambient temperature and 0.06565 kg/kW.h at 33 0C ambient temperature. Power produced by the power turbine is 3532,657 HP at 24 0C ambient temperature and 3046,557 HP at 33 0C ambient temperature, while the thermal efficiency cycle is 54,159% at 24 0C ambient temperature and 49,727% at 33 0C ambient temperature. Keywords: gas turbine, ambient temperature, specific fuel consumption, thermal efficiency.

Rolls Royce/Allison 501-K Gas Turbine Antifouling Compressor Coatings Evaluation

2003 ◽  
Vol 125 (3) ◽  
pp. 482-488 ◽  
Author(s):  
Daniel E. Caguiat
Keyword(s):  
Gas Turbine ◽  
Fuel Consumption ◽  
Gas Turbines ◽  
Performance Degradation ◽  
Specific Fuel Consumption ◽  
Inlet Temperature ◽  
Test Results ◽  
Turbine Inlet ◽  
Compressor Performance ◽  
Compressor Efficiency

The Naval Surface Warfare Center, Carderock Division (NSWCCD) Gas Turbine Emerging Technologies Code 9334 was tasked by NSWCCD Shipboard Energy Office Code 859 to research and evaluate fouling resistant compressor coatings for Rolls Royce Allison 501-K Series gas turbines. The objective of these tests was to investigate the feasibility of reducing the rate of compressor fouling degradation and associated rate of specific fuel consumption (SFC) increase through the application of anti-fouling coatings. Code 9334 conducted a market investigation and selected coatings that best fit the test objective. The coatings selected were Sermalon for compressor stages 1 and 2 and Sermaflow S4000 for the inlet guide vanes and remaining 12 compressor stages. Both coatings are manufactured by Sermatech International, are intended to substantially decrease blade surface roughness, have inert top layers, and contain an anti-corrosive aluminum-ceramic base coat. Sermalon contains a Polytetrafluoroethylene (PTFE) topcoat, a substance similar to Teflon, for added fouling resistance. Tests were conducted at the Philadelphia Land Based Engineering Site (LBES). Testing was first performed on the existing LBES 501-K17 gas turbine, which had an uncoated compressor. The compressor was then replaced by a coated compressor and the test was repeated. The test plan consisted of injecting a known amount of salt solution into the gas turbine inlet while gathering compressor performance degradation and fuel economy data for 0, 500, 1000, and 1250 KW generator load levels. This method facilitated a direct comparison of compressor degradation trends for the coated and uncoated compressors operating with the same turbine section, thereby reducing the number of variables involved. The collected data for turbine inlet, temperature, compressor efficiency, and fuel consumption were plotted as a percentage of the baseline conditions for each compressor. The results of each plot show a decrease in the rates of compressor degradation and SFC increase for the coated compressor compared to the uncoated compressor. Overall test results show that it is feasible to utilize antifouling compressor coatings to reduce the rate of specific fuel consumption increase associated with compressor performance degradation.

scholarly journals Improved Specific Fuel Consumption of Open Cycle Gas Turbines by Utilization of Waste Heat

1976 ◽  
Author(s):  
H. Balukjian ◽  
J. Gatzoulis
Keyword(s):  
Steam Turbine ◽  
Gas Turbine ◽  
Fuel Consumption ◽  
Gas Turbines ◽  
Waste Heat ◽  
Specific Fuel Consumption ◽  
Sharp Rise ◽  
Engine Design ◽  
Open Cycle ◽  
Fuel Costs

Because of the recent sharp rise in fuel costs, the U. S. Navy is re-emphasizing methods to reduce the specific fuel consumption of gas turbine powered ships to be introduced in future designs. This paper presents the results of a study in which the specific fuel consumption (SFC) of open cycle gas turbines was reduced by two alternate methods of utilizing the waste heat: (a) generation of steam for combined gas and steam turbine power (COGAS) from an existing engine design, and (b) incorporation of a recuperator for a new engine design.

Prototype Testing Methods Variable Geometry Industrial Gas Turbines

1982 ◽  
Author(s):  
G. McQuiggan
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Testing Methods ◽  
Power Turbine ◽  
Turbine Vanes ◽  
Compressor Inlet ◽  
Industrial Gas Turbines ◽  
Variable Power ◽  
Engine Testing ◽  
Industrial Gas Turbine

This paper describes the prototype engine testing methods used to determine the performance and integrity of a new industrial gas turbine in the 20-MW to 30-MW range (CW352). This gas turbine is very flexible in that it is designed with the following features: (i) Variable compressor inlet guide vanes; (ii) 15-, 16- or 17-stage compressor alternatives; (iii) Variable power turbine vanes; (iv) Regenerative or simple cycle mode of operation.

The Development of the Quick-Start Gas Turbine Standby Generator Set

1980 ◽  
Author(s):  
Y. Fujikawa ◽  
K. Nakanishi ◽  
H. Kanegae ◽  
Y. Sakaki
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Low Cost ◽  
Electrical Power ◽  
Transient Responses ◽  
Power Generator ◽  
Polar Moment ◽  
Power Turbine ◽  
Variable Power ◽  
Industrial Use

A simple, relatively low-cost, two-shaft gas turbine has been developed for industrial use. It is a modification of the two-shaft regenerative vehicular gas turbine that was previously developed and has a variable power turbine nozzle. A standby electric power generator set that is powered by the gas turbine has also been built. Its rated output is 300 ps and it generates 200 kw of electrical power. As it is a two-shaft gas turbine, it requires only 9 seconds to start with a 3.5-kw electric starting motor. While the transient responses, especially in the area of speed changes caused by step load changes, appear to be an inevitable shortcoming, they have been minimized by the reduction of the gasifier rotating unit’s polar moment of inertia and other improvements in the fuel control system and units. Consequently, the use of this generator set for general purposes will not pose any problem.

scholarly journals Powering Ahead

2011 ◽  
Vol 133 (05) ◽  
pp. 30-33 ◽  
Author(s):  
Lee S. Langston
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Nuclear Power ◽  
Electrical Power ◽  
The United States ◽  
Combined Cycle ◽  
Electrical Power System ◽  
Efficient Technology ◽  
The Military

This article explores the increasing use of natural gas in different turbine industries and in turn creating an efficient electrical system. All indications are that the aviation market will be good for gas turbine production as airlines and the military replace old equipment and expanding economies such as China and India increase their air travel. Gas turbines now account for some 22% of the electricity produced in the United States and 46% of the electricity generated in the United Kingdom. In spite of this market share, electrical power gas turbines have kept a much lower profile than competing technologies, such as coal-fired thermal plants and nuclear power. Gas turbines are also the primary device behind the modern combined power plant, about the most fuel-efficient technology we have. Mitsubishi Heavy Industries is developing a new J series gas turbine for the combined cycle power plant market that could achieve thermal efficiencies of 61%. The researchers believe that if wind turbines and gas turbines team up, they can create a cleaner, more efficient electrical power system.

A Control System for a High-Quality Generating Set Equipped With a Two-Shaft Gas Turbine

1991 ◽  
Vol 113 (2) ◽  
pp. 290-295 ◽  
Author(s):  
H. Kumakura ◽  
T. Matsumura ◽  
E. Tsuruta ◽  
A. Watanabe
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Gas Turbines ◽  
High Quality ◽  
Constant Frequency ◽  
Generating Set ◽  
Generating Sets ◽  
Power Turbine ◽  
Computer Centers ◽  
Supply Systems

A control system has been developed for a high-quality generating set (150-kW) equipped with a two-shaft gas turbine featuring a variable power turbine nozzle. Because this generating set satisfies stringent frequency stability requirements, it can be employed as the direct electric power source for computer centers without using constant-voltage, constant-frequency power supply systems. Conventional generating sets of this kind have normally been powered by single-shaft gas turbines, which have a larger output shaft inertia than the two-shaft version. Good frequency characteristics have also been realized with the two-shaft gas turbine, which provides superior quick start ability and lower fuel consumption under partial loads.

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