Off-Design Behavior Analysis and Operating Curve Design of Marine Intercooled Gas Turbine

Ji, Nian-kun; Li, Shuying; Wang, Zhitao; Zhao, Ningbo

doi:10.1155/2017/8325040

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…This simplification will surely bring some differences in comparison to the case when the combustion gases were used, but the differences will be small because the combustion gases from the main gas turbine as well as combustion gases from the additional combustion chamber, Fig. 1, are dominantly composed of air with a small proportion of fuel [33,34]. Therefore, this simplification will not have a major influence on the obtained exergy analysis results for any component as well as for the whole observed system, and at the same time will make performed calculations easier and faster.…”

Section: Introductionmentioning

confidence: 99%

Exergy analysis of marine waste heat recovery CO2 closed-cycle gas turbine system

et al. 2020

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This paper presents an exergy analysis of marine waste heat recovery CO2 closed-cycle gas turbine system. Based on the operating parameters obtained in system exploitation, it is performed analysis of each system component individually, as well as analysis of the whole observed system. While observing all heat exchangers it is found that combustion gases-CO2 heat exchangers have the lowest exergy destructions and the highest exergy efficiencies (higher than 92%). The lowest exergy efficiency of all heat exchangers is detected in Cooler (51.84%). Observed system is composed of two gas turbines and two compressors. The analysis allows detection of dominant mechanical power producer and the dominant mechanical power consumer. It is also found that the turbines from the observed system have much higher exergy efficiencies in comparison to compressors (exergy efficiency of both turbines is higher than 94%, while exergy efficiency of both compressors did not exceed 87%). The whole observed waste heat recovery system has exergy destruction equal to 6270.73 kW, while the exergy efficiency of the whole system is equal to 64.12% at the selected ambient state. Useful mechanical power produced by the whole system and used for electrical generator drive equals 11204.80 kW. The obtained high exergy efficiency of the whole observed system proves its application on-board ships.

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Section: Introductionmentioning

confidence: 99%

Exergy analysis of marine waste heat recovery CO2 closed-cycle gas turbine system

et al. 2020

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“…Referencing to the design features of intercooled system for LMS100 ( Figure 1) and WR-21 ( Figure 2), a large number of investigations have been carried out in the past decades to study the operating characteristics of intercooled system and its effect on gas turbine. [5][6][7][8] All of the available results indicated that the heat exchange condition of intercooled system can directly affect the stable and dynamic performances of gas turbine. Besides, a careful inspection of Figures 1 and 2 reveals that although the intercooled systems used in LMS100 and WR-21 are significantly different, the corresponding heat exchange between compressed air and coolant is usually wasted directly.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of organic Rankine cycle power generation system for intercooled cycle gas turbine

Liu

Zhang

Zhao

et al. 2018

Advances in Mechanical Engineering

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Intercooled cycle gas turbine has great potential in improving the output power because of the low energy consumption of high-pressure compressor. In order to more efficiently recovery and utilize the waste heat of the intercooled system, an organic Rankine cycle power generation system is developed to replace the traditional intercooled system in this study. Considering the effects of different kinds of organic working fluids, the thermodynamic performance of organic Rankine cycle power generation system is investigated in detail. On this basis, the sensitivity analyses of some key parameters are conducted to study the operating improvements of organic Rankine cycle power generation system. The results indicate that the integration of organic Rankine cycle and intercooled cycle gas turbine not only can be used for waste heat power generation but also increases the output power and efficiency of intercooled cycle gas turbine by selecting the organic working fluids of n-butane (R600), n-pentane (R601), toluene, and n-heptane. And compared to the others, organic Rankine cycle power generation system with toluene exhibits the best performance. The maximum enhancements of output power and thermal efficiency are 6.08% and 2.14%, respectively. Moreover, it is also concluded that both ambient temperatures and intercooled cycle gas turbine operating conditions are very important factors affecting the operating performances of organic Rankine cycle power generation system.

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“…This is considered one of the main methods by which develop high-power marine power units. Ji et al [ 27 ] presented an analysis of a simplified coupled nonlinear system, see Figure 19 , and developed a new model for the steady-state of a marine intercooled gas turbine that can be used for simulating off-design performance.…”

Section: Gas Turbine Power Plant Equipment Performance and Improvementsmentioning

confidence: 99%

“…The operating diagram of the intercooled gas turbine was optimized using a three-dimensional graphical method. The resulting operating curves revealed that the control strategy at steady-state conditions for the intercooled gas turbine should be variable cycle control [ 27 ].…”

Section: Gas Turbine Power Plant Equipment Performance and Improvementsmentioning

confidence: 99%

Application of Nanofluids in Gas Turbine and Intercoolers—A Comprehensive Review

et al. 2022

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Today, the optimal use of non-renewable energy sources, reducing pollution, and increasing the efficiency of power-generating cycles are of particular importance. There are several ways to increase the efficiency of gas turbines; one that has recently attracted attention is to use an intercooler. However, the efficiency of the heat exchanger used in intercoolers depends on the type of heat exchanger, the characteristics of the operating fluid and the thermal boundary layers, and the pump speed. Improving the thermophysical properties of the working fluid is a passive method of increasing heat transfer, which has attracted the attention of those researching engineering applications. The current review addresses the latest methods of improving gas turbine efficiency using nanofluids and includes experimental and numerical studies. First, the general principles governing turbines are described, then the commonly used types of heat exchangers are introduced. Finally, studies on the use of nanofluids in heat exchangers are reviewed. The technology of producing nanoparticles that can be used in heat exchangers is also discussed. This review article can provide the reader with comprehensive information on making nanofluids and using them in heat exchangers used as intercoolers.

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Off-Design Behavior Analysis and Operating Curve Design of Marine Intercooled Gas Turbine

Cited by 7 publications

References 27 publications

Exergy analysis of marine waste heat recovery CO2 closed-cycle gas turbine system

Exergy analysis of marine waste heat recovery CO2 closed-cycle gas turbine system

Performance analysis of organic Rankine cycle power generation system for intercooled cycle gas turbine

Application of Nanofluids in Gas Turbine and Intercoolers—A Comprehensive Review

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