Review of thermal cycles exploiting the exergy of liquefied natural gas in the regasification process

Gómez, Manuel Romero; García, Ramón Ferreiro; Gómez, Javier; Carril, José Carbia

doi:10.1016/j.rser.2014.07.029

Cited by 188 publications

(67 citation statements)

References 75 publications

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“…Exergy loss in the LNG and ORC pumps were calculated by Equation (6), in the LNG and ORC evaporator by Equation (7), in the LNG and ORC expanders by Equation (8), and in the heat exchanger by Equation (13). External exergy loss (exergy in point 5 in Figure 14) was calculated by by Equation (14).…”

Section: Combined System: Direct Expansion and Orcmentioning

confidence: 99%

“…Many authors have reported the possibility of utilizing LNG cold exergy [12][13][14]. LNG can be a source of cooling power [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…The most popular cold power cycles are: the direct expansion cycle [20], the Rankine cycle [21][22][23], the Brayton cycle [24], the absorption power cycle [25], the Stirling cycle [26][27][28] and combined cycles [29][30][31][32]. In most existing cryogenic plants, the recovery method for LNG exergy is based on direct expansion and ORC cycles [14]. The analyses performed in the presented research will focus on these methods as the most popular, and also with the greatest potential for application in transportation systems.…”

Section: Introductionmentioning

confidence: 99%

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Exergetic Analysis, Optimization and Comparison of LNG Cold Exergy Recovery Systems for Transportation

Dorosz

Wojcieszak

Malecha

2018

Entropy

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LNG (Liquefied Natural Gas) shares in the global energy market is steadily increasing. One possible application of LNG is as a fuel for transportation. Stricter air pollution regulations and emission controls have made the natural gas a promising alternative to liquid petroleum fuels, especially in the case of heavy transport. However, in most LNG-fueled vehicles, the physical exergy of LNG is destroyed in the regasification process. This paper investigates possible LNG exergy recovery systems for transportation. The analyses focus on "cold energy" recovery systems as the enthalpy of LNG, which may be used as cooling power in air conditioning or refrigeration. Moreover, four exergy recovery systems that use LNG as a low temperature heat sink to produce electric power are analyzed. This includes single-stage and two-stage direct expansion systems, an ORC (Organic Rankine Cycle) system, and a combined system (ORC + direct expansion). The optimization of the above-mentioned LNG power cycles and exergy analyses are also discussed, with the identification of exergy loss in all components. The analyzed systems achieved exergetic efficiencies in the range of 20% to 36%, which corresponds to a net work in the range of 214 to 380 kJ/kg LNG .

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Section: Combined System: Direct Expansion and Orcmentioning

confidence: 99%

“…Many authors have reported the possibility of utilizing LNG cold exergy [12][13][14]. LNG can be a source of cooling power [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exergetic Analysis, Optimization and Comparison of LNG Cold Exergy Recovery Systems for Transportation

Dorosz

Wojcieszak

Malecha

2018

Entropy

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“…At a receiving terminal, LNG needs to be evaporated into gas at environmental temperature and at the required pressure before fed into the gas distribution system. The topic of LNG cold energy recovery for both electricity production and different energetic uses is considered in the literature since the late 90s [1,2], mainly under the impulse of the Japanese experience, which is surely the oldest and one of the most important in the world concerning LNG facilities, as it can be clearly evidenced, analyzing papers like [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…There are several ways using the energy given off by LNG regasification to complete thermodynamic cycle to generate power: they basically belong to three particular options. The methods discussed in the literature are direct expansion cycle schemes [4,5]; Organic Rankine Cycle (ORC) with intervening media or more complex cascading Rankine cycle configurations [8,9]. While the direct expansion cycle directly uses LNG as working fluid for expansion in turbine, ORC uses seawater as the primary heat source and LNG as the heat sink with an auxiliary working fluid (usually a low boiling hydrocarbon) for power production in turbine.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of direct expansion configurations for electricity production by LNG cold energy recovery

Franco

Casarosa

2015

Applied Thermal Engineering

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Performance Analysis and Optimization of a Novel Combined Cooling, Heating, and Power System‐Integrated Rankine Cycle and Brayton Cycle Utilizing the Liquified Natural Gas Cold Energy

et al. 2022

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In recent years, the efficient utilization of energy has become a hot issue in scientific research. Society needs sustainable development. Fossil energy will gradually withdraw from the stage of energy utilization in the future, and the significance of clean energy becomes increasingly prominent. Natural gas (NG) stands out for its superior characteristics among many clean energy sources. It is generally accepted as the cleanest fossil energy source in the world, [1] which has advantages of high calorific value and economic and environmental protection. NG emits very little greenhouse gas during the combustion process, and its application can greatly reduce the global greenhouse effect. NG is liquid state when stored and when in short distance transported, liquefied natural gas (LNG) is colorless, nontoxic, odorless and noncorrosive, and is 600 times the volume of NG. [2,3] The temperature is À162 °C at 101.325 kPa, LNG will be gasified to more than 25 °C before being transported to the gas user terminal, and the huge cold energy will be released simultaneously. Utilizing this part of energy rationally will produce excellent benefits.At present, LNG cold energy is mainly used as a cold source and applied to the combined power generation, refrigeration, and heating cycle engineering fields with thermal energy (industrial waste heat, solar energy, geothermal energy, etc.) together. In the past decade, there have been extensive in-depth researches conducted in this direction by many scholars. Lee et al. [4] designed and

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Review of thermal cycles exploiting the exergy of liquefied natural gas in the regasification process

Cited by 188 publications

References 75 publications

Exergetic Analysis, Optimization and Comparison of LNG Cold Exergy Recovery Systems for Transportation

Exergetic Analysis, Optimization and Comparison of LNG Cold Exergy Recovery Systems for Transportation

Thermodynamic analysis of direct expansion configurations for electricity production by LNG cold energy recovery

Performance Analysis and Optimization of a Novel Combined Cooling, Heating, and Power System‐Integrated Rankine Cycle and Brayton Cycle Utilizing the Liquified Natural Gas Cold Energy

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