Analysis by computer simulation of a combined gas turbine and steam turbine (COGAS) system for marine propulsion

Jefferson, Matthew; Zhou, Peilin; Hindmarch, G

doi:10.1080/20464177.2003.11020164

Cited by 11 publications

(8 citation statements)

References 11 publications

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“…We find that the ORC and heat pump systems can offer great potential for energy efficiency improvements. These results for cruise ships differ from previous studies of other ship types, highlighting the dependency on and differences in energy efficiency solutions for different ship types (Jefferson et al 2003;Sofras & Prousalidis 2014).…”

Section: Introductioncontrasting

confidence: 97%

“…One particularly common energy conservation measure (ECM) is waste heat recovery (WHR). Technologies related to WHR have been extensively studied (Jefferson et al 2003;Dzida 2009;Balaji & Yaakob 2012;Shu et al 2013;Benvenuto et al 2014;Song et al 2015). Jefferson et al have studied the operation of a combined gas and steam system for marine propulsion and showed how different elements in the system respond under transient conditions when the system is accelerated or decelerated (2003).…”

Section: Relevant Workmentioning

confidence: 99%

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Increasing energy efficiency in passenger ships by novel energy conservation measures

Geneidy

Otto

Ahtila

et al. 2017

Journal of Marine Engineering & Technology

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To achieve increasing emission requirements, the cruise ship industry is working to develop higher efficiency ships. Cruise ships are different from other ship types in their relatively higher consumption of electrical power, steam and hot water. Several novel high-efficiency system concepts are possible for on-board electrical power generation and other utility services, each with differing impacts and first costs. Low-emission concepts novel to the cruise ship industry include combinations of exhaust gas heat recovery, heat pumps, steam turbines and organic Rankine cycles (ORCs). Yet, evaluation of these concepts is difficult given the different operating modes of cruises, and overall efficiency is dependent on the dynamic operational sequences. In this paper, we compare alternative energy efficiency concepts for cruise ships through simulation studies of the ship operations when equipped with different novel power generation systems. We find that the dual pressure steam systems and ORC offer the greatest potential for energy efficiency improvements in the cruise ship industry. We also find that relatively conventional technologies enable cruise ships to comply with planned upcoming higher ship energy efficiency requirements.

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Section: Introductioncontrasting

confidence: 97%

Section: Relevant Workmentioning

confidence: 99%

Increasing energy efficiency in passenger ships by novel energy conservation measures

Geneidy

Otto

Ahtila

et al. 2017

Journal of Marine Engineering & Technology

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“…Abbott (1977) described a detailed analysis of the dynamic performance of a COGAS system and concluded "… it has been shown that a COGAS plant can be designed with an uncomplicated control system capable of stable operation in the steady-state condition and throughout the full range of extreme ship maneuvers. "A recent doctoral thesis (Jefferson 2006) at the University of Newcastle upon Tyne presents results of a computer simulation of the dynamic behavior of such a system. The conclusion of that work is that acceptable dynamic behavior can be achieved.…”

Section: Other System Variablesmentioning

confidence: 99%

COGAS propulsion for LNG ships

Wiggins

2011

J. Marine. Sci. Appl.

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Propulsion of liquefied natural gas (LNG) ships is undergoing significant change. The traditional steam plant is losing favor because of its low cycle efficiency. Medium-speed diesel-electric and slow-speed diesel-mechanical drive ships are in service, and more are being built. Another attractive alternative is combined gas and steam turbine (COGAS) drive. This approach offers significant advantages over steam and diesel propulsion. This paper presents the case for the COGAS cycle.

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“…Another analyzed power system was the combine gassteam cycle shown in Fig. 2 [7]. In such systems working medium from gas turbine outlet is directed to waste heat boiler in which the heat is used to produce superheated steam supplying steam turbine.…”

Section: Analyzed Cycles Of Nuclear Power Plantsmentioning

confidence: 99%

Comparative Analysis of Thermodynamic Cycles of Selected Nuclear Ship Power Plants With High-Temperature Helium-Cooled Nuclear Reactor

Szewczuk-Krypa

Grzymkowska

Głuch

2018

Polish Maritime Research

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This paper presents a comparative analysis of thermodynamic cycles of two ship power plant systems with a high-temperature helium-cooled nuclear reactor. The first of them is a gas system with recuperator, in which classical gas chamber is substituted for a HTGR reactor (High Temperature Gas-cooled Reactor). The second of the considered cycles is a combined gas-steam system where working medium flux from gas turbine outlet is directed into waste heat boiler and its heat is utilized for production of superheated steam to drive steam turbine. Preliminary calculations of the combine cycles showed that it is necessary to expand the system by adding to its steam part an inter-stage overheat for secondary steam, owing to that a required degree of steam dryness at outlet from the turbine can be reached, ensuring its correct operational conditions. The analyzed power systems were compared to each other with regard to efficiency of their thermodynamic cycles. Also, efficiency of particular cycles were subjected to optimization in respect to such parameters as : working gas temperature at outlet from reactor in gas system as well as steam pressure at outlet from waste heat boiler and partition pressure in steam part of combined system. Advantages of nuclear power plants compared with the classical power systems dominating currently in sea transport were also discussed.

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Analysis by computer simulation of a combined gas turbine and steam turbine (COGAS) system for marine propulsion

Cited by 11 publications

References 11 publications

Increasing energy efficiency in passenger ships by novel energy conservation measures

Increasing energy efficiency in passenger ships by novel energy conservation measures

COGAS propulsion for LNG ships

Comparative Analysis of Thermodynamic Cycles of Selected Nuclear Ship Power Plants With High-Temperature Helium-Cooled Nuclear Reactor

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