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Relevant bibliographies by topics / Marine Gas-turbines

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Academic literature on the topic 'Marine Gas-turbines'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 January 2023

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Journal articles on the topic "Marine Gas-turbines"

1

Brady, C. O., and D. L. Luck. "The Increased Use of Gas Turbines as Commercial Marine Engines." Journal of Engineering for Gas Turbines and Power 116, no. 2 (April 1, 1994): 428–33. http://dx.doi.org/10.1115/1.2906839.

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Over the last three decades, aeroderivative gas turbines have become established naval ship propulsion engines, but use in the commercial marine field has been more limited. Today, aeroderivative gas turbines are being increasingly utilized as commercial marine engines. The primary reason for the increased use of gas turbines is discussed and several recent GE aeroderivative gas turbine commercial marine applications are described with particular aspects of the gas turbine engine installations detailed. Finally, the potential for future commercial marine aeroderivative gas turbine applications is presented.

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2

Langston, Lee S. "Riding the Surge." Mechanical Engineering 135, no. 05 (May 1, 2013): 37–41. http://dx.doi.org/10.1115/1.2013-may-2.

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This article explores the advantages of gas turbines in the marine industry. Marine gas turbines, which are designed specifically for use on ships, have long been one of the segments of the gas turbine market. One advantage that gas turbines have over conventional marine diesels is volume. Gas turbines are the prime movers for the modern combined cycle electric power plant. Both CFM International (a joint venture of General Electric and France’s Snecma) and Pratt & Whitney are working on new engines for this multibillion dollar single-aisle, narrow-body market. Pratt & Whitney’s new certified PW1500G geared turbofans will have a first flight powering the first Bombardier CSeries aircraft. On land, sea, and air, the surge in gas turbine production is remarkable. The experts suggest that what the steam engine was to the 19th century and the internal combustion engine was to the 20th, the gas turbine might be to the 21st century: the ubiquitous prime mover of choice.

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Birk, A. M., and W. R. Davis. "Suppressing the Infrared Signatures of Marine Gas Turbines." Journal of Engineering for Gas Turbines and Power 111, no. 1 (January 1, 1989): 123–29. http://dx.doi.org/10.1115/1.3240210.

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The exhaust plumes and visible areas of the engine exhaust ducting associated with marine gas turbines are major sources of infrared (IR) radiation on ships. These high-radiance sources make excellent targets for IR-guided threats. In recent years significant efforts have been made to reduce or eliminate these high-radiance sources to increase the survivability of naval and commercial ships when sailing in high-risk areas of the world. Typical IR signature suppression (IRSS) systems incorporate film cooling of visible metal sources, optical blockage to eliminate direct line-of-sight visibility of hot exhaust system parts, and cooling air injection and mixing for plume cooling. Because the metal surfaces radiate as near black bodies, every attempt is made to reduce the temperatures of the visible surfaces to near ambient conditions. The exhaust gases radiate selectively and therefore do not have to be cooled to the same degree as the metal surfaces. The present paper briefly describes the motivation for incorporating IRSS into the exhaust systems of marine power plants. IRSS hardware developed in Canada by the Canadian Department of National Defence and Davis Engineering Limited is presented along with details of their operating principles. A typical installation is presented and discussed. Design impacts on the ship are described with reference to engine back pressure, noise, and weight and center of gravity effects.

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4

Condé, J. F. G., G. C. Booth, and A. F. Taylor. "Protection against hot corrosion in marine gas turbines." Materials Science and Technology 2, no. 3 (March 1986): 314–17. http://dx.doi.org/10.1179/mst.1986.2.3.314.

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5

Gribinichenko, M. V., A. V. Kurenskii, and N. V. Sinenko. "Axial bearing with gas lubrication for marine turbines." Russian Engineering Research 33, no. 10 (October 2013): 566–68. http://dx.doi.org/10.3103/s1068798x13100067.

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6

Karstensen, K. W., and J. O. Wiggins. "A Variable-Geometry Power Turbine for Marine Gas Turbines." Journal of Turbomachinery 112, no. 2 (April 1, 1990): 165–74. http://dx.doi.org/10.1115/1.2927629.

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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.

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7

Langston, Lee S. "Whisper and Roar." Mechanical Engineering 136, no. 07 (July 1, 2014): 38–43. http://dx.doi.org/10.1115/1.2014-jul-2.

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This article focuses on the use of gas turbines for electrical power, mechanical drive, and marine applications. Marine gas turbines are used to generate electrical power for propulsion and shipboard use. Combined-cycle electric power plants, made possible by the gas turbine, continue to grow in size and unmatched thermal efficiency. These plants combine the use of the gas turbine Brayton cycle with that of the steam turbine Rankine cycle. As future combined cycle plants are introduced, we can expect higher efficiencies to be reached. Since almost all recent and new U.S. electrical power plants are powered by natural gas-burning, high-efficiency gas turbines, one has solid evidence of their contribution to the greenhouse gas reduction. If coal-fired thermal power plants, with a fuel-to-electricity efficiency of around 33%, are swapped out for combined-cycle power plants with efficiencies on the order of 60%, it will lead to a 70% reduction in carbon emissions per unit of electricity produced.

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Bai, Mingliang, Jinfu Liu, Yujia Ma, Xinyu Zhao, Zhenhua Long, and Daren Yu. "Long Short-Term Memory Network-Based Normal Pattern Group for Fault Detection of Three-Shaft Marine Gas Turbine." Energies 14, no. 1 (December 22, 2020): 13. http://dx.doi.org/10.3390/en14010013.

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Fault detection and diagnosis can improve safety and reliability of gas turbines. Current studies on gas turbine fault detection and diagnosis mainly focus on the case of abundant fault samples. However, fault data are rare or even unavailable for gas turbines, especially newly-run gas turbines. Aiming to realize fault detection with only normal data, this paper proposes the concept of normal pattern group. A group of long-short term memory (LSTM) networks are first used for characterizing the mapping relationships among measurable parameters of healthy three-shaft gas turbines. Experiments show that the proposed method can detect all 13 common gas path faults of three-shaft gas turbines sensitively while remaining low false alarm rate. Comparison experiment with single normal pattern model verifies the necessaries and superiorities of using normal pattern group. Meanwhile, comparison between LSTM network and other methods including support vector regression, single-layer feedforward neural network, extreme learning machine and Elman recurrent neural network verifies the superiorities of LSTM network in fault detection. Furthermore, comparison experiment with four common one-class classifiers further verifies the superiorities of the proposed method. This also indicates the superiorities of data-driven methods and gas turbine principle fusion to some extent.

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9

Sanneman, Bruce N. "Pioneering Gas Turbine-Electric System in Cruise Ships: A Performance Update." Marine Technology and SNAME News 41, no. 04 (October 1, 2004): 161–66. http://dx.doi.org/10.5957/mt1.2004.41.4.161.

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Recent marine projects have extended the range of applications for GE's LM aeroderivative gas turbines in commercial marine markets. The world's first all gas turbine-powered cruise ship, GTS Millennium, entered service in June 2000. The in-service performance of the combined gas turbine electric and steam system (COGES) will be discussed further in this paper.

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Altosole, Marco, Giovanni Benvenuto, Ugo Campora, Michele Laviola, and Alessandro Trucco. "Waste Heat Recovery from Marine Gas Turbines and Diesel Engines." Energies 10, no. 5 (May 18, 2017): 718. http://dx.doi.org/10.3390/en10050718.

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Dissertations / Theses on the topic "Marine Gas-turbines"

1

Chapman, Greg John. "The use of a mathematical model of a marine gas turbine to investigate the effects of engine degradation." Ottawa, 1985.

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2

Bonet, Mathias Usman. "Techno-environmental assessment of marine gas turbines for the propulsion of merchant ships." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/7386.

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This research study seeks to evaluate the techno-economic and environmental implications of a variety of aero-derivative marine gas turbine cycles that have been modelled for the propulsion of different types of merchant ships. It involves the installation and operation of gas turbine propulsion systems in different marine environmental conditions and aims to evaluate the effect of the aerodynamic and hydrodynamic variations expected to be encountered by these ships when they navigate across different climates and oceans along selected fixed trade routes. A combination of simulation tools developed in Cranfield University at the Department of Power and Propulsion including the validated gas turbine modelling and simulation code called “Turbomatch” and the “APPEM” simulation code for the analysis and Prediction of exhaust pollutants have been used along with the ongoing development of an integrated marine gas turbine propulsion system simulation platform known as “Poseidon”. It is the main objective of this research to upgrade the competence level of “Poseidon” so as to facilitate the conduct of a variety of longer and more complex oceangoing voyage scenarios through the introduction of an ambient temperature variation numerical module. Expanding the existing code has facilitated the prediction of the effect of varying aerodynamic and hydrodynamic conditions that may be encountered by gas turbine propulsion systems when such ships navigate through unstable ocean environments along their fixed trade routes at sea. The consequences of operating the marine gas turbines under ideal weather conditions has been investigated and compared with a wide range of severe operating scenarios under unstable weather and sea conditions in combination with hull fouling has been assessed. The techno-economic and environmental benefits of intercooling/exhaust waste heat recuperation of the ICR model have been predicted through the evaluation of different ship propulsion performance parameters in a variety of voyage analysis leading to the prediction of fuel consumption quantities, emission of NOx, CO2, CO and UHCs and the estimation of the HPT blade life as well. The different gas turbine cycle configurations of the research were found to respond differently when operated under various environmental profiles of the ship’s trade route and the number of units for each model required to meet the power plant capacity in each scenario and for each ship was assessed. The study therefore adds to the understanding of the operating costs and asset management of marine gas turbine propulsion systems of any ocean carrier and in addition it reveals the economic potentials of using BOG as the main fuel for firing gas turbine propulsion plants of LNG Carriers.

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3

Uhlig, Robert Angus. "Preliminary design and integration procedures for gas turbine intercoolers on naval combatants." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/80076.

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The methodology used in analyzing the feasibility of installing direct and indirect intercooling systems on naval gas turbines is presented. The indirect system is comprised of two types of heat exchangers; an air to ethylene glycol, plate fin heat exchanger, and an ethylene glycol to seawater shell and tube heat exchanger. The direct system utilizes an air to seawater shell and tube heat exchanger. The analysis requires, as input, air mass flow rates, compressor efficiencies and pressure ratios. The output, based on given environmental constraints and an assumed overall intercooler effectiveness, provides mass flow rates of seawater and ethylene glycol, heat exchanger effectiveness and size, intermediate fluid temperatures, and air and seawater outlet temperatures. The output provides preliminary data for specific heat exchanger design and pump and piping selections.
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Books on the topic "Marine Gas-turbines"

1

Steam and gas turbines for marine propulsion. 2nd ed. Annapolis, Md: Naval Institute Press, 1987.

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2

Pounder, C. Coulson. Pounder's marine diesel engines and gas turbines. 8th ed. Boston: Elsevier Butterworth Heinemann, 2003.

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3

service), ScienceDirect (Online, and Knovel (Firm), eds. Pounder's marine diesel engines and gas turbines. 9th ed. Amsterdam: Elsevier/Butterworth-Heinemann, 2009.

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4

Gao, Jie, Qun Zheng, Feng Lin, Chen Liang, and Yu Liu. Variable Geometry Turbine Technology for Marine Gas Turbines. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-6952-2.

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5

Wilson, David Gordon. High-efficiency Brayton-cycle engines for marine propulsion. Alton: Microinfo, 1985.

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6

Wilson, David Gordon. High-efficiency Brayton-cycle engines for marine propulsion. Cambridge, Mass: Massachusetts Institute of Technology, Sea Grant College Program, 1985.

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7

Wilson, David Gordon. High-efficiency Brayton-cycle engines for marine propulsion. Cambridge, Mass: Massachusetts Institute of Technology, Sea Grant College Program, 1985.

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8

Stammettii, Vincent A. Survey and analysis of marine gas turbine control after 1975. Monterey, Calif: Naval Postgraduate School, 1988.

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9

Stammetti, Vincent A. Comparative controller design for a marine gas turbine propulsion plant. Monterey, California: Naval Postgraduate School, 1988.

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10

D, Metz Stephen. Survey of gas tubine control for application to marine gas turbine propulsion system control. Monterey, Calif: Naval Postgraduate School, 1989.

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Book chapters on the topic "Marine Gas-turbines"

1

Gao, Jie, Qun Zheng, Feng Lin, Chen Liang, and Yu Liu. "Introduction." In Variable Geometry Turbine Technology for Marine Gas Turbines, 1–16. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6952-2_1.

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Gao, Jie, Qun Zheng, Feng Lin, Chen Liang, and Yu Liu. "Flow Mechanisms and Characteristics of Variable Geometry Turbine." In Variable Geometry Turbine Technology for Marine Gas Turbines, 17–49. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6952-2_2.

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3

Gao, Jie, Qun Zheng, Feng Lin, Chen Liang, and Yu Liu. "Structural Design Technology of a Variable Vane System for Variable Geometry Turbines." In Variable Geometry Turbine Technology for Marine Gas Turbines, 159–70. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6952-2_5.

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Gao, Jie, Qun Zheng, Feng Lin, Chen Liang, and Yu Liu. "Variable Vane Turning Design Method for a Variable Geometry Turbine." In Variable Geometry Turbine Technology for Marine Gas Turbines, 95–158. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6952-2_4.

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5

Gao, Jie, Qun Zheng, Feng Lin, Chen Liang, and Yu Liu. "Aerodynamic Characteristics and Reliability Test Technology for a Variable Geometry Turbine." In Variable Geometry Turbine Technology for Marine Gas Turbines, 171–213. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6952-2_6.

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Gao, Jie, Qun Zheng, Feng Lin, Chen Liang, and Yu Liu. "Aerodynamic Design Method for a Variable Geometry Turbine." In Variable Geometry Turbine Technology for Marine Gas Turbines, 51–94. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6952-2_3.

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7

Chandler, John E. "Chapter 4 | Fuels for Land and Marine Diesel Engines and for Nonaviation Gas Turbines." In Significance of Tests for Petroleum Products: 9th Edition, 37–56. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2018. http://dx.doi.org/10.1520/mnl120170022.

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8

"Gas turbines." In Pounder's Marine Diesel Engines, 830–69. Elsevier, 2004. http://dx.doi.org/10.1016/b978-075065846-1/50032-8.

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9

Woodyard, Doug. "Gas Turbines." In Pounder's Marine Diesel Engines and Gas Turbines, 829–64. Elsevier, 2009. http://dx.doi.org/10.1016/b978-0-7506-8984-7.00031-x.

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10

Latarche, Malcolm. "Gas turbines." In Pounder's Marine Diesel Engines and Gas Turbines, 851–92. Elsevier, 2021. http://dx.doi.org/10.1016/b978-0-08-102748-6.00027-x.

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Conference papers on the topic "Marine Gas-turbines"

1

Abdelrazik, A., and P. Cheney. "Compressor Cleaning Effectiveness for Marine Gas Turbines." In ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-011.

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In two decades of operating gas turbines at sea, the Canadian Navy has gained much experience of compressor fouling and cleaning. Methods of combatting the problems encountered have encouraged investigations aimed at understanding the process of compressor contamination and into the effectiveness of various cleaning methods. These investigations have been undertaken at the Navy’s land based test facility using data from the fleet, engines returned from service and facility equipment. This paper reports the findings of the investigations and includes the current recommendations for washing procedures in the installations of the Canadian Navy. The direction of future work aimed at providing further improvements in contaminant removal is included.

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2

Kuo, Simion C. "Coal-Fired Gas Turbines for Marine Propulsion Applications." In ASME 1986 International Gas Turbine Conference and Exhibit. American Society of Mechanical Engineers, 1986. http://dx.doi.org/10.1115/86-gt-202.

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This paper discusses the prospects of using coal as the primary source of energy to power gas turbines for marine propulsion applications. The problems associated with burning coal for generating power are reviewed in terms of their inherent limitations, environmental effects, compatibility with turbomachinery combusters, and economic considerations. Various forms of coal-based heat sources and their applicable combuster system configurations are identified. Integration of these fuel/combustor combinations with different gas turbine cycles yields a number of possible coal-fired gas turbine systems. A comparison of these candidate systems with marine propulsion system requirements resulted in the selection of a COGAS system burning coal-oil slurry. Candidate COGAS system configurations are presented, and the overall propulsion engine performance is defined. A baseline coal-oil fired marine COGAS propulsion system was selected, and its performance characteristics were estimated, taking into account the exhaust gas flow effect on the waste-heat steam generator. The payload capabilities and endurance limitations for a coal-fired COGAS ship are presented and compared with those of a conventional oil-fired ship to show the possible fuel cost savings.

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3

Walker, John, and Alan Summerfield. "Marine Gas Turbines - Engine Health Monitoring - New Approaches." In ASME 1987 International Gas Turbine Conference and Exhibition. American Society of Mechanical Engineers, 1987. http://dx.doi.org/10.1115/87-gt-245.

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Recent developments, coupled with field experience of Engine Health Monitoring Techniques within the Royal Navy Gas Turbine Fleet have enabled a fresh initiative. The advantages of adopting a policy of Condition Based Maintenance rather than a rigid hours concept are outlined and the Engine Health Monitoring (EHM) developments and affects on overhaul facilities are explained.

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4

Schell, Joseph A. "Study of Fuel Efficient Gas Turbines for Ship Service Power Generation." In Marine Rail Propulsion Technology Conference. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1987. http://dx.doi.org/10.4271/871380.

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5

Karstensen, Karl W., and Jesse O. Wiggins. "A Variable-Geometry Power Turbine for Marine Gas Turbines." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-282.

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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.

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6

Brady, C. O., and D. L. Luck. "The Increased Use of Gas Turbines as Commercial Marine Engines." In ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/93-gt-142.

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Over the last three decades, aeroderivative gas turbines have become established naval ship propulsion engines but use in the commercial marine field has been more limited. Today, aeroderivative gas turbines are being increasingly utilized as commercial marine engines. The primary reasons for the increased use of gas turbines is discussed and several recent GE aeroderivative gas turbine commercial marine applications are described with particular aspects of the gas turbine engine installations detailed. Finally, the potential for future commercial marine aeroderivative gas turbine applications is presented.

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7

Roumeliotis, I., N. Aretakis, K. Mathioudakis, and E. A. Yfantis. "Modelling and Assessment of Compressor Faults on Marine Gas Turbines." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69740.

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Any prime mover exhibits the effects of wear and tear over time, especially when operating in a hostile environment. Marine gas turbines operation in the hostile marine environment results in the degradation of their performance characteristics. A method for predicting the effects of common compressor degradation mechanisms on the engine operation and performance by exploiting the “zooming” feature of current performance modelling techniques is presented. Specifically a 0D engine performance model is coupled with a higher fidelity compressor model which is based on the “stage stacking” method. In this way the compressor faults can be simulated in a physical meaningful way and the overall engine performance and off design operation of a faulty engine can be predicted. The method is applied to the case of a twin shaft engine, a configuration that is commonly used for marine propulsion. In the case of marine propulsion the operating profile includes a large portion of off-design operation, thus in order to assess the engine’s faults effects, the engine operation should be examined with respect to the marine vessel’s operation. For this reason, the engine performance model is coupled to a marine vessel’s mission model that evaluates the prime mover’s operating conditions. In this way the effect of a faulty engine on vessels’ mission parameters like overall fuel consumption, maximum speed, pollutant emissions and mission duration can be quantified.

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8

McCartney, Clive, and Robin D. Hughes. "Endurance Testing of Marine Gas Turbines for the Royal Navy." In ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/96-gt-330.

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Royal Naval policy since 1967 has been to employ gas turbines for major surface warship propulsion. In support of this policy, all new engines have been subject to endurance testing at DTEO Pyestock. Marinised Tyne and Olympus aero engines were tested during the 1960s and 70s which confirmed their initial suitability for RN service and uprated performance. Lessons learnt in formulating the test process were applied to the Spey SMIA engine programme in 1982. Further refinements, following comparison of sea operating experience with test bed results were applied to the 3000 hour endurance trial of the 18 MW Spey SMIC engine, which completed in 1993. The current testing at Pyestock is of the 21.6 MW Intercooled Recuperated (1CR) WR21 engine, presently under development for the USN in cooperation with the RN. The endurance trials being planned will require a further change in emphasis in order to address the unique operating regimes of an 1CR engine. The paper describes the evolution of endurance testing techniques, highlighting the particular requirements for complex cycle engines and discusses the opportunities that arose for piggyback trials during typical endurance testing regimes.

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9

Hartranft, John, Bruce Thompson, and Dan Groghan. "The United States Navy “Standard Day” for Marine Gas Turbines." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64048.

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Following the successful development of aircraft jet engines during World War II (WWII), the United States Navy began exploring the advantages of gas turbine engines for ship and boat propulsion. Early development soon focused on aircraft derivative (aero derivative) gas turbines for use in the United States Navy (USN) Fleet rather than engines developed specifically for marine and industrial applications due to poor results from a few of the early marine and industrial developments. Some of the new commercial jet engine powered aircraft that had emerged at the time were the Boeing 707 and the Douglas DC-8. It was from these early aircraft engine successes (both commercial and military) that engine cores such as the JT4-FT4 and others became available for USN ship and boat programs. The task of adapting the jet engine to the marine environment turned out to be a substantial task because USN ships were operated in a completely different environment than that of aircraft which caused different forms of turbine corrosion than that seen in aircraft jet engines. Furthermore, shipboard engines were expected to perform tens of thousands of hours before overhaul compared with a few thousand hours mean time between overhaul usually experienced in aircraft applications. To address the concerns of shipboard applications, standards were created for marine gas turbine shipboard qualification and installation. One of those standards was the development of a USN Standard Day for gas turbines. This paper addresses the topic of a Navy Standard Day as it relates to the introduction of marine gas turbines into the United States Navy Fleet and why it differs from other rating approaches. Lastly, this paper will address examples of issues encountered with early requirements and whether current requirements for the Navy Standard Day should be changed. Concerning other rating approaches, the paper will also address the issue of using an International Organization for Standardization, that is, an International Standard Day. It is important to address an ISO STD DAY because many original equipment manufacturers and commercial operators prefer to rate their aero derivative gas turbines based on an ISO STD DAY with no losses. The argument is that the ISO approach fully utilizes the power capability of the engine. This paper will discuss the advantages and disadvantages of the ISO STD DAY approach and how the USN STD DAY approach has benefitted the USN. For the future, with the advance of engine controllers and electronics, utilizing some of the features of an ISO STD DAY approach may be possible while maintaining the advantages of the USN STD DAY.

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10

Snyder, Philip H., and M. Razi Nalim. "Pressure Gain Combustion Application to Marine and Industrial Gas Turbines." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69886.

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Renewed interest in pressure gain combustion applied as a replacement of conventional combustors within gas turbine engines creates the potential for greatly increased capability engines in the marine power market segment. A limited analysis has been conducted to estimate the degree of improvements possible in engine thermal efficiency and specific work for a type of wave rotor device utilizing these principles. The analysis considers a realistic level of component losses. The features of this innovative technology are compared with those of more common incremental improvement types of technology for the purpose of assessing potentials for initial market entry within the marine gas turbine market. Both recuperation and non-recuperation cycles are analyzed. Specific fuel consumption improvements in excess of 35% over those of a Brayton cycle are indicated. The technology exhibits the greatest percentage potential in improving efficiency for engines utilizing relatively low or moderate mechanical compression pressure ratios. Specific work increases are indicated to be of an equally dramatic magnitude. The advantages of the pressure gain combustion approach are reviewed as well as its technology development status.

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Reports on the topic "Marine Gas-turbines"

1

Analysis of Recompression-Regeneration sCO 2 Combined Cycle Utilizing Marine Gas Turbine Exhaust Heat: Effect of Operating Parameters. SAE International, July 2022. http://dx.doi.org/10.4271/2022-01-5059.

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Abstract:

Gas turbines are fast being explored to replace the existing steam or diesel-based power packs to propel marine transportation. Marine gas turbines have already come to power high-speed marine vessels transporting perishable goods as well as high-speed naval fleets. This article investigates the potential of gas turbine to be made hybrid with supercritical recompression-regeneration carbon dioxide (CO2) cycle drawing thermal energy from the exhaust of marine gas turbines. The recompression unit acts as the topping cycle and the regeneration unit acts as the bottoming cycle of the proposed combined supercritical CO2 (sCO2) cycle. The cycle has a maximum temperature of 530°C and supercritical pressure of 20 MPa. The proposed sCO2 powerplant is compact because of the smaller size of the turbomachinery, owing to the low specific volume of working fluid in the supercritical range. The proposed combined cycle is analyzed for different operating conditions including maximum temperature, minimum temperature, and cycle pressure ratio. The thermal efficiency of the proposed sCO2 cycle is 30.77% and efficiency of the hybrid cycle (including marine GT) is 58.17%, i.e., enhancement in thermal efficiency of the marine vessel power pack by 18.6%. Further the power output of the gas turbine-sCO2 hybrid cycle is enhanced by nearly 23.5% to 45.7 megawatts (MW). The second law of thermodynamic efficiency of the proposed combined cycle is close to 52.5%. The proposed hybrid gas turbine-sCO2 cycle has immense potential to replace the aging propulsion systems of existing marine vessels as the proposed power cycle is greener and more compact.

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