Utilization of the cryogenic exergy of LNG by a mirror gas-turbine

Kaneko, Ken‐ichi; Ohtani, Kiyoshi; Tsujikawa, Yoshiharu; Fujii, Shoichi

doi:10.1016/j.apenergy.2004.02.007

Cited by 52 publications

(18 citation statements)

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“…Air cooling capacity and power augmentation for a combined cycle system are demonstrated as a function of the ambient temperature and humidity in their research, while the corresponding increase in power is larger than 8% on average if the humidity is low enough for warm ambient air and water vapour in the air does not condense. As a special Brayton cycle the mirror gas turbine (MGT) method is introduced recently to recycle the cold exergy of LNG [31]; see Fig. 5 (b) where the cold released from LNG is used to cool the exhaust gas from a turbine to increase the output work of the turbine and part of the cold exergy from LNG is transformed to decrease the compression work.…”

Section: Indirect Brayton Cycle Methodsmentioning

confidence: 99%

Fundamentals and applications of cryogen as a thermal energy carrier: A critical assessment

Chen

Ding

2010

International Journal of Thermal Sciences

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Section: Indirect Brayton Cycle Methodsmentioning

confidence: 99%

Fundamentals and applications of cryogen as a thermal energy carrier: A critical assessment

Chen

Ding

2010

International Journal of Thermal Sciences

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“…There have been a lot of researches focusing on improving the efficiency of the power generation cycles, and many advanced power generation cycles utilizing LNG cold energy were proposed. In this review, only the researches after the year of 2010 is discussed, and some previous research can be referred to (Griepentrog et al, 1976;Angelino et al, 1978;Krey, 1980;Najjar et al, 1991;Najjar et al, 1993;Wong, 1994;Kim et al, 1995;Chiesa et al, 1997;Hisazumi et al, 1998;Miyazaki et al, 2000;Deng et al, 2004;Kaneko et al, 2004;Wang et al, 2004;Zhang et al, 2006;Shi et al, 2007;Bai et al, 2008;Lu et al, 2009;Shi et al, 2010;Tsatsaronis et al, 2010).…”

Section: Recent Advanced Power Generation Cycles Using Lng Cold Energymentioning

confidence: 99%

Review on recent liquefied natural gas cold energy utilization in power generation cycles

Jia

Dai³

2018

Adv. Geo-Energy Res.

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Liquefied natural gas (LNG) needs to be gasified before supplied to the users, and considerable amount of cold energy, about 830 kJ/kg, will be released during this process. Recovery of LNG cold energy bears significance of energy-saving and environmental protection. Among the many ways of using LNG cold energy, power generation is the most effective and suitable one for large-scale applications. Many novel power generation cycles have been designed for utilizing LNG cold energy so far. This paper reviews the recent researches on LNG cold energy utilization in power generation, and discusses 15 novel power generation cycles utilizing LNG cold energy.

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“…They analyzed the influences of key parameters on thermal efficiency and exergy efficiency of the cascading power cycle. Kaneko et al [3] proposed a new kind of combined cycle consisting of a conventional gas turbine worked as a topping cycle and an inverted Brayton cycle as a bottoming cycle used to recover the cold energy consumed in liquefaction of natural gas. The feasibility study of using inlet air cooling by virtue of the cold energy of LNG to enhance power output of gas/steam combined cycle power plants during warm seasons was studied by Kim and Ro [4].…”

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confidence: 99%

Proposing a novel combined cycle for optimal exergy recovery of liquefied natural gas

Salimpour

Zahedi

2012

Heat Mass Transfer

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The effective utilization of the cryogenic exergy associated with liquefied natural gas (LNG) vaporization is important. In this paper, a novel combined power cycle is proposed which utilizes LNG in different ways to enhance the power generation of a power plant. In addition to the direct expansion in the appropriate expander, LNG is used as a low-temperature heat sink for a middle-pressure gas cycle which uses nitrogen as working fluid. Also, LNG is used to cool the inlet air of an open Brayton gas turbine cycle. These measures are accomplished to improve the exergy recovery of LNG. In order to analyze the performance of the system, the influence of several key parameters such as pressure ratio of LNG turbine, ratio of the mass flow rate of LNG to the mass flow rate of air, pressure ratio of different compressors, LNG pressure and inlet pressure of nitrogen compressor, on the thermal efficiency and exergy efficiency of the offered cycle is investigated. Finally, the proposed combined cycle is optimized on the basis of first and second laws of thermodynamics. Nomenclature mMass flow rate (kg/s) h Enthalpy (kJ/kg) LHV Lower heating value (kJ/kg) T Temperature (K) e Specific exergy (kJ/kg) E Exergy (kW)

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Utilization of the cryogenic exergy of LNG by a mirror gas-turbine

Cited by 52 publications

References 1 publication

Fundamentals and applications of cryogen as a thermal energy carrier: A critical assessment

Fundamentals and applications of cryogen as a thermal energy carrier: A critical assessment

Review on recent liquefied natural gas cold energy utilization in power generation cycles

Proposing a novel combined cycle for optimal exergy recovery of liquefied natural gas

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