On the recovery of LNG physical exergy by means of a simple cycle or a complex system

Bisio, G.; Tagliafico, Luca A.

doi:10.1016/s1164-0235(01)00037-1

Cited by 58 publications

(32 citation statements)

References 8 publications

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“…This step also consumes electric energy, since the LNG needs to be pumped to the desired vaporization pressure passing through various receiving components for a controlled regasification. Currently and with few exceptions, most terminals worldwide use the thermal energy of seawater or other low temperature water sources to regasify LNG [9].…”

Section: Regasificationmentioning

confidence: 99%

“…• Exhaust gas from a GT as heat source and cascaded steam, propane, methane and LNG Rankine cycles: Bisio and Tagliafico [9].…”

Section: References For Lng Regasificationmentioning

confidence: 99%

“…• Hot air from a sintering plant as heat source, and closed recuperated nitrogen Brayton cycle with intercooling: Bisio and Tagliafico [9].…”

Section: References For Lng Regasificationmentioning

confidence: 99%

“…• Combined gas turbine-steam turbine, propane and methane Rankine cycles and use of additional seawater: Bisio and Tagliafico [9].…”

Section: References For Lng Regasificationmentioning

confidence: 99%

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System Analysis of Waste Heat Applications With LNG Regasification

́lez-Salazar

Belloni

Finkenrath

et al. 2009

Volume 4: Cycle Innovations; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine

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The combination of the continuously growing demand of energy in the world, the depletion of oil and its sharp price increase, as well as the urgent need for cleaner and more efficient fuels have boosted the global trade of liquefied natural gas (LNG). Nowadays, there is an increasing interest on the design philosophy of the LNG receiving terminals, due to the fact that the existing technologies either use seawater as heating source or burn part of the fuel for regasifying LNG, thus destroying the cryogenic energy of LNG and causing air pollution or harm to marine life. This investigation addresses the task of developing novel systems able to simultaneously regasify LNG and generate electric power in the most efficient and environmentally friendly way.Existing and proposed technologies for integrated LNG regasification and power generation were identified and simple, efficient, safe and compact alternatives were selected for further analysis. A baseline scenario for integrated LNG regasification and power generation was established and simulated, consisting of a cascaded Brayton configuration with a typical small gas turbine as topping cycle and a simple closed Brayton cycle as bottoming cycle. Various novel configurations were created, modeled and compared to the baseline scenario in terms of LNG regasification rate, efficiency and power output. The novel configurations include closed Rankine and Brayton cycles for the bottoming cycle, systems for power augmentation in the gas turbine and combinations of options. A study case with a simple and compact design was selected, preliminarily designed and analyzed according to characteristics and costs provided by suppliers. The performance, costs and design challenges of the study case were then compared to the baseline case. The results show that the study case causes lower investment costs and a smaller footprint of the plant, at the same time offering a simple design solution though with substantially lower efficiencies.

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Section: Regasificationmentioning

confidence: 99%

“…• Exhaust gas from a GT as heat source and cascaded steam, propane, methane and LNG Rankine cycles: Bisio and Tagliafico [9].…”

Section: References For Lng Regasificationmentioning

confidence: 99%

“…• Hot air from a sintering plant as heat source, and closed recuperated nitrogen Brayton cycle with intercooling: Bisio and Tagliafico [9].…”

Section: References For Lng Regasificationmentioning

confidence: 99%

“…• Combined gas turbine-steam turbine, propane and methane Rankine cycles and use of additional seawater: Bisio and Tagliafico [9].…”

Section: References For Lng Regasificationmentioning

confidence: 99%

See 2 more Smart Citations

System Analysis of Waste Heat Applications With LNG Regasification

́lez-Salazar

Belloni

Finkenrath

et al. 2009

Volume 4: Cycle Innovations; Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine

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show abstract

“…2) Exergy is an essential thermodynamic concept that has been widely applied in the design/evaluation of thermal plants, and it contributes significantly toward improving the system efficiency and thermo-economy. [3][4][5][6][7][8][9] However, to the best of our knowledge, a comparative exergy analysis of the two cement production systems-portland cement (PC) and BFC-is not yet reported. Therefore, the purpose of this study is to evaluate the exergy of PC cement against the exergy of BFC without heat recovery from molten slag.…”

Section: Introductionmentioning

confidence: 99%

Process Analysis of the Effective Utilization of Molten Slag Heat by Direct Blast Furnace Cement Production System

2010

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Thermodynamic analysis of an LNG fuelled combined cycle power plant with waste heat recovery and utilization system

Shi

Che

2007

Int. J. Energy Res.

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SUMMARYThis paper has proposed an improved liquefied natural gas (LNG) fuelled combined cycle power plant with a waste heat recovery and utilization system. The proposed combined cycle, which provides power outputs and thermal energy, consists of the gas/steam combined cycle, the subsystem utilizing the latent heat of spent steam from the steam turbine to vaporize LNG, the subsystem that recovers both the sensible heat and the latent heat of water vapour in the exhaust gas from the heat recovery steam generator (HRSG) by installing a condensing heat exchanger, and the HRSG waste heat utilization subsystem. The conventional combined cycle and the proposed combined cycle are modelled, considering mass, energy and exergy balances for every component and both energy and exergy analyses are conducted. Parametric analyses are performed for the proposed combined cycle to evaluate the effects of several factors, such as the gas turbine inlet temperature (TIT), the condenser pressure, the pinch point temperature difference of the condensing heat exchanger and the fuel gas heating temperature on the performance of the proposed combined cycle through simulation calculations. The results show that the net electrical efficiency and the exergy efficiency of the proposed combined cycle can be increased by 1.6 and 2.84% than those of the conventional combined cycle, respectively. The heat recovery per kg of flue gas is equal to 86.27 kJ s À1 . One MW of electric power for operating sea water pumps can be saved. The net electrical efficiency and the heat recovery ratio increase as the condenser pressure decreases. The higher heat recovery from the HRSG exit flue gas is achieved at higher gas TIT and at lower pinch point temperature of the condensing heat exchanger.

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On the recovery of LNG physical exergy by means of a simple cycle or a complex system

Cited by 58 publications

References 8 publications

System Analysis of Waste Heat Applications With LNG Regasification

System Analysis of Waste Heat Applications With LNG Regasification

Process Analysis of the Effective Utilization of Molten Slag Heat by Direct Blast Furnace Cement Production System

Thermodynamic analysis of an LNG fuelled combined cycle power plant with waste heat recovery and utilization system

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