scholarly journals Gas Turbine Application to U.S. Naval Ship Propulsion

1982 ◽  
Author(s):  
E. F. Brady
Keyword(s):  
Gas Turbines ◽  
High Efficiency ◽  
Fuel Efficiency ◽  
Ship Design ◽  
Fuel Loading ◽  
Propulsion Systems ◽  
Ship Propulsion ◽  
Shaft System ◽  
Prime Movers ◽  
Cross Connect

With introduction of the Spruance Class Destroyers, gas turbines have been used to power both destroyers and frigates. However, to achieve maximum crusing range, high efficiency propulsion systems are required. The scope of this paper is limited to a basic description of propulsion plant configurations, using gas turbines as prime movers. These systems serve as candidates for U.S. Navy ship propulsion. Comparisons are limited to fuel loading, because of its impact on ship design. Although annual fuel consumption is a more accurate measure of fuel efficiency, it requires a specific ship design. This is beyond the scope of this paper. Of the systems considered, the maximum reduction in required fuel loading (for a specific cruising range) was 20%. To achieve optimum efficiency, cross-connect ability (for a two propeller shaft system) is essential. Potential cross-connect methods include mechanical, electrical and steam features. The first two are described in this paper.

The Prospects for Lightweight Ship Propulsion Systems

1978 ◽  
Author(s):  
S. C. Kuo ◽  
T. L. O. Horton ◽  
H. T. Shu ◽  
W. R. Seng
Keyword(s):  
Gas Turbines ◽  
Economic Feasibility ◽  
Closed Cycle ◽  
Propulsion Systems ◽  
Ship Propulsion ◽  
Parametric Analyses ◽  
Propulsion Power

A comprehensive systems study was made to evaluate the technological and economic feasibility of utilizing open- and closed-cycle gas turbines for providing advanced lightweight propulsion power for future Navy ship applications. Extensive parametric analyses were made of the performance and weight characteristics for the propulsion engine cycles selected, and applicable turbomachinery technologies were reviewed to estimate their future advances expected. The payload capabilities and endurance limitations resulting from utilization of different propulsion systems in the 40,000 -to 300,000-shp range for selected ship types were identified.

The Gas Turbine Family GT13E and GT13E2 Provides Reliable Power for Asia

1996 ◽  
Author(s):  
Gregor Gnädig
Keyword(s):  
Power Generation ◽  
Gas Turbines ◽  
Power Plants ◽  
High Efficiency ◽  
Operating Experience ◽  
Diesel Oil ◽  
Combined Cycle ◽  
Asian Countries ◽  
High Efficient ◽  
Prime Movers

Many Asian countries are experiencing economic growth which averages 5–10% per year. This environment has led to a privatization process in the power generation industry from typically state-run utilities to a system in which a federal agency oversees a market divided by private utilities and independent power producers (IPP) with the need for high efficiency, reliable power generation running on natural gas and diesel oil. In the 50 Hz market, modem, high efficient gas turbines of the type GT13E and GT13E2 have been chosen as prime movers in many combined cycle power plants in Asian countries. This paper includes a product description, and a general overview of GT13E and GT13E2 operating experience, well as an economic evaluation of a typical 500 MW combined cycle power plant.

scholarly journals Gas turbine intake air hybrid cooling systems and their rational designing

2021 ◽  
Vol 323 ◽  
pp. 00030
Author(s):  
Mykola Radchenko ◽  
Andrii Radchenko ◽  
Dariusz Mikielewicz ◽  
Krzysztof Kosowski ◽  
Serhiy Kantor ◽  
...  
Keyword(s):  
Gas Turbines ◽  
High Efficiency ◽  
Fuel Efficiency ◽  
Lithium Bromide ◽  
Cooling Capacity ◽  
Climatic Conditions ◽  
Air Cooling ◽  
Two Stage ◽  
Ambient Temperatures ◽  
Exhaust Heat

The general trend to improve the fuel efficiency of gas turbines (GT) at increased ambient temperatures is turbine intake air cooling (TIAC) by exhaust heat recovery chillers The high efficiency absorption lithium-bromide chillers (ACh) of a simple cycle are the most widely used, but they are not able to cool intake air lower than 15°C because of a chilled water temperature of about 7°C. A two-stage hybrid absorption-ejector chillers (AECh) were developed with ejector chiller as a low temperature stage to provide deep air cooling to 10°C and lower. A novel trend in TIAC by two-stage air cooling in chillers of hybrid type has been proposed to provide about 50% higher annual fuel saving in temperate climatic conditions as compared with ACh cooling. The advanced methodology to design and rational distribute the cooling capacity of TIAC systems that provides a closed to maximum annual fuel reduction without oversizing was developed.

Electric Hydraulic Governor Control for Industrial and Commercial Gas Turbine Use

1966 ◽  
Vol 88 (3) ◽  
pp. 243-250
Author(s):  
N. G. Alvis
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Electrical Power Generation ◽  
Gas Turbines ◽  
Electrical Power ◽  
Mechanical Loads ◽  
Automatic Operation ◽  
Ship Propulsion ◽  
Commercial Use ◽  
Prime Movers

This paper covers the latest applications of an electric hydraulic governor control for industrial-commercial gas turbine use. Gas turbines are now being used for mechanical loads, electrical power generation, and ship propulsion. Many of these applications require some degree of automatic operation and operation with other types of prime movers. The electric governor has aided this new concept in gas turbine application. Several typical installations are discussed, including both industrial and commercial use.

MT30: The Heart of Future Integrated Power and Propulsion Systems

2014 ◽  
Author(s):  
Oliver Rath
Keyword(s):  
Gas Turbines ◽  
Electric Propulsion ◽  
Propulsion System ◽  
Propulsion Systems ◽  
Marine Propulsion ◽  
Wide Range ◽  
Prime Movers ◽  
The Republic ◽  
The Uk ◽  
System Configurations

The MT30 has been developed specifically for 21st century marine propulsion and has now been applied in a wide range of different propulsion system configurations in the US Navy, the UK Royal Navy and the Republic of Korea Navy. Both naval and commercial marine propulsion systems are increasingly seeking more power from fewer prime movers to facilitate lower cost of ownership. In naval systems, the move to partial or full-electric propulsion for larger escorts and the introduction of single boost gas turbines for smaller escorts has allowed a reduction in the number of installed prime movers, while retaining and often enhancing survivability and redundancy. The Rolls-Royce MT30 marine gas turbine can be regarded as an enabling technology in this area to allow a wide variety of propulsion system options to be realised. This paper describes the current trends in Naval propulsion systems with particular focus on the platform design, operational and through-life benefits of the MT30 in the context of different system arrangements. A variety of different systems are covered with a particular focus on hybrid electromechanical and all-electric systems.

Ship Hull and Machinery Optimization Using Physics-Based Design Software

2002 ◽  
Vol 39 (02) ◽  
pp. 109-117
Author(s):  
Changben Jiang ◽  
Brian Forstell ◽  
David Lavis ◽  
Owen Ritter
Keyword(s):  
Fuel Consumption ◽  
Gas Turbines ◽  
Operating Cost ◽  
Ship Design ◽  
Total Weight ◽  
Maximum Speed ◽  
Fuel Savings ◽  
Shaft Power ◽  
Prime Movers ◽  
Design Software

Ship design software is applied to the study of improving the design of an existing cruiser. The focus of this paper is on exploring machinery configuration options that could significantly reduce the overall fuel consumption and, consequently, reduce the total weight and operating cost of the ship. The prime movers, most likely gas turbines, of the majority of the naval ships today are usually designed for maximum speed, which is much higher than the ship's cruise speed. In the case of the CG47, the shaft power required at cruise speed is only 16% of that at maximum speed. Consequently, the specific fuel consumption is 64% higher at cruise speed because the gas turbines are delivering only a fraction of their rated power. In this paper, auxiliary engines are introduced and their overall impact on ship design are studied. Four different machinery configurations, namely, CODOG, CODAG, COGOG and COGAG, are examined. Results show that as much as 34% fuel savings could be achieved and the overall reduction in total ship weight could be as high as 9%.

Ceramic Heat Exchangers-The Key to High Efficiency in Very Small Gas Turbines

1997 ◽  
Author(s):  
Colin F. McDonald
Keyword(s):  
Heat Exchangers ◽  
Gas Turbines ◽  
High Efficiency ◽  
High Reliability ◽  
Inlet Temperature ◽  
Exhaust Heat ◽  
Prime Movers ◽  
Generation Costs ◽  
Recuperative Heat Exchanger ◽  
Generator Sets

The requirements for the emerging new class of very small gas turbines (ie.25–75kw) to meet the needs of generator sets and hybrid electric vehicles are more demanding, in terms of both capital and power generation costs, than those associated with existing small simple cycle gas turbines. To be successful the reliability, maintenance, and economics of these very small gas turbines must offer advantages over existing prime-movers. With the plateauing of compressor and turbine aerodynamic efficiencies, and turbine inlet temperature increase paced by materials technologies, the use of an exhaust heat recovery exchanger is mandatory to meet performance goals. The first generation of these very small gas turbines, currently in the pre-production phase, are operating with very attractive efficiencies of around 30 percent based on the utilization of existing types of metallic recuperators. Performance advancement and evolution of these engines will be realized as ceramic component technologies mature, and to cost-effectively achieve an efficiency of 35 percent, and to ultimately exploit the full performance potential of over 40 percent efficiency, high temperature ceramic heat exchangers will be needed. In this paper the focus is on the use of the fixed-boundary type of recuperative heat exchanger because of its simplicity, high reliability, and with no moving parts the assurance of maintenance free operation over the life of the engine.

Propulsion Systems and the MT30 Marine Gas Turbine: The Quest for Power

2003 ◽  
Author(s):  
Roger W. Tooke ◽  
David Bricknell
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Electric Propulsion ◽  
Simple Cycle ◽  
Power Demand ◽  
Propulsion Systems ◽  
Marine Propulsion ◽  
Potential Applications ◽  
Endurance Testing ◽  
Prime Movers

Both naval and commercial marine propulsion systems are increasingly seeking more power from fewer prime movers. In naval systems, the move to electric propulsion for larger escorts and the introduction of single boost gas turbines for smaller escorts has allowed the reduction in number of installed prime movers, while retaining the required redundancy. To meet this power demand, Rolls-Royce has marinised the Trent 800 aero gas turbine to produce the MT30 a 36MW simple cycle marine gas turbine. With first packaged engine deliveries available in early 2004, this paper introduces the MT30, outlines the marinisation process and announces the performance confirmed though the two demonstration engines. Completion of endurance testing, leading to preliminary certification of the engine is programmed for June 2003. In addition, this paper looks at the potential applications, (both mechanical and genset) of the MT30 and the propulsion system benefits made possible through the engine’s introduction.

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