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Two processes for boil-off gas (BOG) re-liquefaction of liquefied natural gas (LNG) carrier with normal-temperature compressor are proposed and compared: (1) the re-liquefaction system with the single mixed refrigerant process (SMRP), (2) the re-liquefaction system with the dual mixed refrigerant process (DMRP). The main thermodynamic parameters to be compared are specific energy consumption, exergy efficiency, coefficient of performance, heat transfer curves and exergy losses of main equipment in optimized case and base case. The result shows that the performance of the DMRP is better than that of the SMRP and the specific energy consumption of DMRP is 0.5635 kWh/kgLNG. In addition, by comparing the thermodynamic parameters of the re-liquefaction system with the normal-temperature compressor and the cryogenic compressor, it can be found that not only the cooling capacity of BOG is used effectively, but also the energy consumption is reduced and the efficiency is improved for the normal-temperature compressor system. Therefore, for the two mixed refrigerant re-liquefaction systems, the performance of the normal-temperature compression system is better than that of the low-temperature compression system.
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- Original title: Comparison and analysis of two processes for BOG re-liquefaction in LNG carrier with normal-temperature compressor.
- Record ID : 30027462
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 115
- Publication date: 2020/07
- DOI: http://dx.doi.org/10.1016/j.ijrefrig.2020.03.008
- Document available for consultation in the library of the IIR headquarters only.
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Indexing
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Themes:
Gas liquefaction and separation;
LNG and LPG;
Compressors - Keywords: LNG; Compressor; Liquefaction; Temperature; Energy consumption; Comparison
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Optimization of natural gas pressurized liquefa...
- Author(s) : XIONG X., LIN W.
- Date : 2014/04/07
- Languages : English
- Source: Cryogenics 2014. Proceedings of the 13th IIR International Conference: Prague, Czech Republic, April 7-11, 2014.
- Formats : PDF
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A novel hydrogen liquefaction process based on ...
- Author(s) : FARAMARZI S., MOUSAVI NAEYNIAN S. M., MAFI M., GHASEMIASL R.
- Date : 2021/11
- Languages : English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 131
- Formats : PDF
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Reducing heavy hydrocarbons in mixed refrigeran...
- Author(s) : JIA R., SONG Y., LIN W.
- Date : 2014/08/02
- Languages : English
- Source: 11th IIR Gustav Lorentzen Conference on Natural Refrigerants (GL2014). Proceedings. Hangzhou, China, August 31-September 2, 2014.
- Formats : PDF
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A techno-economic optimization for micro-scale ...
- Author(s) : ARTECONI A., PACETTI M., POLONARA F.
- Date : 2012/09/11
- Languages : English
- Source: Cryogenics 2012. Proceedings of the 12th IIR International Conference: Dresden, Germany, September 11-14, 2012.
- Formats : PDF
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La liquéfaction des gaz et les ressources mondi...
- Author(s) : GRENIER M.
- Date : 1979/09
- Languages : French
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 2 - n.5
- Formats : PDF
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