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Exergetic and economic evaluation of safety-related concepts for the regasification of LNG integrated into air separation processes

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  • Tesch, Stefanie
  • Morosuk, Tatiana
  • Tsatsaronis, George

Abstract

Natural gas is an important primary energy carrier and plays an important role for the energy supply. The growing liquefied natural gas (LNG) market enables more flexibility in the entire natural gas market. In the regasification terminal, the LNG is regasified, stored and finally distributed to the gas grid. Usually, the low-temperature exergy of the LNG is destroyed while regasified. Alternatively, there are systems where the low temperature of the LNG is used within power systems. A further option is the integration of the regasification of LNG into an air separation process. In this paper, the concepts of integration of LNG regasification into an air separation processes are developed taking into account different possible structures of air separation units (with and without a nitrogen liquefaction block) and safety-related issues. For the evaluation of the novel concepts, exergetic and economic analyses are conducted. The results show that for safety-related concepts the exergetic efficiency is reduced from 53.4% to 51.8%. The results of the economic analysis demonstrate that the systems with a nitrogen liquefaction block are by 10% more expensive, and that the systems where the safety aspect is included are 9% less expensive.

Suggested Citation

  • Tesch, Stefanie & Morosuk, Tatiana & Tsatsaronis, George, 2017. "Exergetic and economic evaluation of safety-related concepts for the regasification of LNG integrated into air separation processes," Energy, Elsevier, vol. 141(C), pages 2458-2469.
    • Handle: RePEc:eee:energy:v:141:y:2017:i:c:p:2458-2469
    DOI: 10.1016/j.energy.2017.04.043
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    References listed on IDEAS

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    1. Tsatsaronis, G. & Morosuk, T., 2010. "Advanced exergetic analysis of a novel system for generating electricity and vaporizing liquefied natural gas," Energy, Elsevier, vol. 35(2), pages 820-829.
    2. Tesch, Stefanie & Morosuk, Tatiana & Tsatsaronis, George, 2016. "Advanced exergy analysis applied to the process of regasification of LNG (liquefied natural gas) integrated into an air separation process," Energy, Elsevier, vol. 117(P2), pages 550-561.
    3. Ebrahimi, Armin & Meratizaman, Mousa & Akbarpour Reyhani, Hamed & Pourali, Omid & Amidpour, Majid, 2015. "Energetic, exergetic and economic assessment of oxygen production from two columns cryogenic air separation unit," Energy, Elsevier, vol. 90(P2), pages 1298-1316.
    4. Morosuk, Tatiana & Tsatsaronis, George, 2008. "A new approach to the exergy analysis of absorption refrigeration machines," Energy, Elsevier, vol. 33(6), pages 890-907.
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    Cited by:

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    2. Sachajdak, Andrzej & Lappalainen, Jari & Mikkonen, Hannu, 2019. "Dynamic simulation in development of contemporary energy systems – oxy combustion case study," Energy, Elsevier, vol. 181(C), pages 964-973.
    3. Cao, Xuewen & Yang, Jian & Zhang, Yue & Gao, Song & Bian, Jiang, 2022. "Process optimization, exergy and economic analysis of boil-off gas re-liquefaction processes for LNG carriers," Energy, Elsevier, vol. 242(C).
    4. Joy, Jubil & Kochunni, Sarun Kumar & Chowdhury, Kanchan, 2022. "Size reduction and enhanced power generation in ORC by vaporizing LNG at high supercritical pressure irrespective of delivery pressure," Energy, Elsevier, vol. 260(C).
    5. Muhammad Haris Hamayun & Naveed Ramzan & Murid Hussain & Muhammad Faheem, 2020. "Evaluation of Two-Column Air Separation Processes Based on Exergy Analysis," Energies, MDPI, vol. 13(23), pages 1-20, December.
    6. Kochunni, Sarun Kumar & Chowdhury, Kanchan, 2020. "Use of dual pressure Claude liquefaction cycles for complete and energy-efficient reliquefaction of boil-off gas in LNG carrier ships," Energy, Elsevier, vol. 198(C).

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