Research on High Efficient Utilization of LNG Cold Energy

Lian, Jinghong; Xia, Bing; Yin, Yebin; Yang, Guang; Yang, Yue; Gou, Xiang; Wang, Enyu; Liu, Liansheng; Wu, Jinxiang

doi:10.2991/iccmcee-15.2015.52

Cited by 11 publications

(7 citation statements)

References 2 publications

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“…Due to the continuous demand for thermal energy, especially in winter, it would be reasonable to use the FSRU regasification plant as an economical and environmentally friendly heat sink for industrial and urban waste heat [25], as the EU has the target of climate neutrality by using waste heat. Therefore, major structural changes in FSRU are not necessary, in contrast to the proposals for its usage presented in the literature [6,8,[10][11][12][13][14][15][16][17][18][19].…”

Section: Results Of Exergy Analysismentioning

confidence: 99%

“…It can be used to provide the thermal energy needed for low-temperature applications [6,10,11]. More attention is being paid to LNG cold energy systems that use this energy for electricity generation [8,12], seawater desalination [13], cryogenic air separation [14,15], freezing of material [16], carbon capture [17,18], as well as for combined LNG cold energy utilization systems [19], storage for liquid air energy [20], pumped thermal energy storage [21], etc. However, it should be noted that application of these systems needs their installation on the FSRU deck.…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Regasification Process Efficiency for Floating Storage Regasification Unit

Semaškaitė

Bogdevičius

Paulauskienė

et al. 2022

JMSE

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Natural gas plays a vital role in the economically and environmentally sustainable future of energy. Its reliable deliveries are required, especially nowadays, when the energy market is so volatile and unstable. The conversion of natural gas to its liquefied form (LNG) allows its transport in greater quantities. Affordability and reliability of clean energy is a key issue even for developed markets. Therefore, natural gas usage enables to implement green solutions into countries’ economies. However, the LNG-production process consumes a considerable amount of energy. This energy is stored in LNG as cold energy. After LNG unloading into storage tanks at receiving terminals, it is vaporised and compressed for transmission to a natural gas pipeline system. During the regasification process, the large part of the energy stored in LNG may be recovered and used for electricity generation, seawater desalination, cryogenic air separation, hydrogen liquefaction, material freezing, carbon dioxide capture, as well as for combined LNG cold energy utilization systems. Moreover, increased efficiency of LNG terminals may attract potential clients. In the presented paper, a mathematical model is performed to determine the influence of LNG composition and regasification process parameters on the quantity of released LNG cold energy in a large-scale floating storage and regasification units (FSRU)-type terminal “Independence” (Lithuania). Flow rate of LNG regasification, pressure, and boil-off gas recondensation have been considered. Possibilities to reduce the energy losses were investigated to find the ways to improve the regasification process efficiency for real FSRU. The results analysis revealed that potential of LNG cold energy at FSRU could vary from 20 to 25 MW. A utilisation of industrial and urban waste heat for the heat sink FSRU is recommended to increase the energy efficiency of the whole regasification process.

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Section: Results Of Exergy Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of Regasification Process Efficiency for Floating Storage Regasification Unit

Semaškaitė

Bogdevičius

Paulauskienė

et al. 2022

JMSE

View full text Add to dashboard Cite

show abstract

“…Yang and Wu proposed a configuration for a cold storage system using LNG cold energy and performed a feasibility analysis in terms of electricity cost [23]. Lian et al suggested a cascade system that could deliver LNG cold energy to a storage system, preventing explosion hazards [24]; Lian et al suggested possible refrigerants that could decrease the operating temperature to −60 • C, and they designed a process of a cold warehouse using LNG cold energy and conducted a thermodynamic analysis of the process [22]. Dispenza et al integrated an LNG regasification system into a power cycle and cold storage [25].…”

Section: Introductionmentioning

confidence: 99%

Liquid Air as an Energy Carrier for Liquefied Natural Gas Cold Energy Distribution in Cold Storage Systems

2021

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Liquid air can be employed as a carrier of cold energy obtained from liquefied natural gas (LNG) and surplus electricity. This study evaluates the potential of liquid air as a distributed source with a supply chain for a cold storage system using liquid air. Energy storing and distributing processes are conceptually designed and evaluated considering both the thermodynamic and economic aspects. Further, the proposed supply chain is compared with a conventional NH3/CO2 cascade refrigeration system. The thermodynamic analysis demonstrates that the exergy efficiency and the coefficient of performance of the proposed supply chain are 22% and 0.56, respectively. Economic analysis is based on a life cycle cost (LCC) evaluation. From the economic analysis, the liquid air production cost and the LCC of a liquid air cold storage system (LACS) are estimated to be 40.4 USD/ton and 34.2 MMUSD, respectively. The LCC is reduced by 19% in the LACS compared with the conventional refrigeration system. The proposed supply chain is economically feasible, although its thermodynamic performances are lower than those of the conventional system. The sensitivity analysis indicates that LNG mass flow rate in the air liquefaction system and the cold storage operating time are dominant parameters affecting the economic performance.

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“…Besides power generation, as detailed in the work from (Khor et al, 2018), LNG cold energy can be used for a variety of purposes. Possible applications include air separation (Otsuka, 2006), hydrocarbon liquefaction (Otsuka, 2006), cryogenic comminution (Lian et al, 2015), production of liquid CO2/dry ice (Hongyu et al, 2010), freezing and refrigeration (Dispenza et al, 2009), seawater desalination (Dhameliya and Agrawal, 2015), and gas turbine inlet air cooling (Otsuka, 2006).…”

Section: Introductionmentioning

confidence: 99%