Thermodynamic analysis of combined cycle power plant using regasification cold energy from LNG terminal

Pattanayak, Lalatendu; Padhi, Biranchi Narayana

doi:10.1016/j.energy.2018.08.187

Cited by 15 publications

(9 citation statements)

References 19 publications

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“…In some instances it has been shown that LNG is not only environmentally, but also economically superior to traditional marine fuel and even marine gas oil [10]. Furthermore, the regasification of LNG, that results in large amounts of energy being generated, has led to the development of new technologies and processes to exploit available cold energy [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A realistic vapour phase heat transfer model for the weathering of LNG stored in large tanks

Huerta

Vesovic

2019

Energy

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A new non-equilibrium model relevant to LNG weathering in large storage tanks under constant pressure has been developed. It treats the heat influx from the surroundings into the vapour and liquid phases separately and allows for heat transfer between the two phases. The main heat transfer mechanisms in the vapour phase are assumed to be advection, due to upward flow of evaporated LNG, and conduction.It has been observed that the vapour temperature increases monotonically as a function of the height, in agreement with recent experimental results. In all the simulations performed the vapour to liquid heat transfer was small, also in line with recent experimental findings, and is estimated to contribute less than 0.3% to boil-off gas rates. The results of this work indicate that the heat transfer by the advective upward flow dominates the energy transfer within the vapour, while the natural convection, in the body of the vapour, can be neglected. The initial liquid filling has a pronounced effect on all the relevant variables, leading to a decrease in vapour temperature and boil-off gas temperature and an increase in boil-off rates. A rule of thumb for estimating the boil-off gas temperature in industrial storage tanks is provided.

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Section: Introductionmentioning

confidence: 99%

A realistic vapour phase heat transfer model for the weathering of LNG stored in large tanks

Huerta

Vesovic

2019

Energy

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“…Some of the electricity produced in this system is consumed in the RO system to produce PW. In the RO system, seawater goes throughout pumps V and VI, and it is pressurized (points 21,22,23,24,25). The pressurized seawater is transferred to membranes I and II, and it is separated into brain water (points 27, 29) and potable water (points 26,28,30,31).…”

Section: Methodsmentioning

confidence: 99%

“…Most thermodynamic cycles can use LNG, such as the direct expansion cycle (DEC) [16], organic Rankine cycle (ORC) [17,18], Kalina cycle [19], Brayton cycle [20,21], combined cycle [22], and CO 2 cycle [23].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Economic Analysis on Integrated CO2, Organic Rankine Cycles, and NaClO Plant Using Liquefied Natural Gas

et al. 2021

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The thermal energy conversion of natural gas (NG) using appropriate configuration cycles represents one of the best nonrenewable energy resources because of its high heating value and low environmental effects. The natural gas can be converted to liquefied natural gas (LNG), via the liquefaction process, which is used as a heat source and sink in various multigeneration cycles. In this paper, a new configuration cycle is proposed using LNG as a heat source and heat sink. This new proposed cycle includes the CO2 cycle, the organic Rankine cycle (ORC), a heater, a cooler, an NaClO plant, and reverse osmosis. This cycle generates electrical power, heating and cooling energy, potable water (PW), hydrogen, and salt all at the same time. For this purpose, one computer program is provided in an engineering equation solver for energy, exergy, and thermo-economic analyses. The results for each subsystem are validated by previous researches in this field. This system produces 10.53 GWh electrical energy, 276.4 GWh cooling energy, 1783 GWh heating energy, 17,280 m3 potable water, 739.56 tons of hydrogen, and 383.78 tons of salt in a year. The proposed system energy efficiency is 54.3%, while the exergy efficiency is equal to 13.1%. The economic evaluation showed that the payback period, the simple payback period, the net present value, and internal rate of return are equal to 7.9 years, 6.9 years, 908.9 million USD, and 0.138, respectively.

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“…18 Pattanayak and Padhi studied combined cycle power plants, which showed significant power output. 19 In contrast, some recent studies investigated the integration of cryogenic energy storage (CES) with LNG cold energy. CES is a technology that uses a cryogenic fluid as an energy storage medium, and it can be applied to the cryogenic process.…”

Section: Introductionmentioning

confidence: 99%

“…Szczygiel and Szargut studied cryogenic exergy of LNG for production of electricity . Pattanayak and Padhi studied combined cycle power plants, which showed significant power output …”

Section: Introductionmentioning

confidence: 99%

Economic Process Selection of Liquefied Natural Gas Regasification: Power Generation and Energy Storage Applications

Park

Lee

You

et al. 2019

Ind. Eng. Chem. Res.

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Liquefied natural gas (LNG) demand has been rapidly increasing due to the global need for clean energy resources. This study analyzes and compares LNG regasification processes and technologies from the technoeconomic perspective and focuses on utilizing LNG cold energy as an economically beneficial option. The comparative technoeconomic analyses focus on the following three process: (1) a simple LNG regasification process, which wastes LNG cold energy; (2) an LNG regasification power plant (LPP) process, which utilizes LNG cold energy to generate electricity; (3) an LNG regasification power plant integrated with a cryogenic energy storage (LPCES) process, which utilizes LNG cold energy to store electricity. The results indicate that the LPP process has the highest net present value of $215 million for 1 MTPA LNG regasification, whereas the simple LNG regasification process and the LPCES process are valued at $210 million and $188 million, respectively. Sensitivity analysis results show that the relative rank of profitability of these three technologies varies according to discount rates, electricity prices, and carbon tax. This study not only revealed that LNG cold energy use can be an economically beneficial option but also helped determine the most profitable LNG regasification process under varying regional and market conditions.

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Thermodynamic analysis of combined cycle power plant using regasification cold energy from LNG terminal

Cited by 15 publications

References 19 publications

A realistic vapour phase heat transfer model for the weathering of LNG stored in large tanks

A realistic vapour phase heat transfer model for the weathering of LNG stored in large tanks

Thermo-Economic Analysis on Integrated CO2, Organic Rankine Cycles, and NaClO Plant Using Liquefied Natural Gas

Economic Process Selection of Liquefied Natural Gas Regasification: Power Generation and Energy Storage Applications

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