Optimization of Butane Boil off Gas Re-Liquefaction Process Using Alternative Technique to Conventional Refrigeration System.

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Title: Optimization of Butane Boil off Gas Re-Liquefaction Process Using Alternative Technique to Conventional Refrigeration System.
Authors: Ali, Alaa M.1 Alaamamdouh865@gmail.com, Omar, Walaa A. E.2, Emam, Eman A.2
Source: Petroleum & Coal. 2025, Vol. 67 Issue 2, p574-587. 14p.
Subject Terms: *Butane, *Energy consumption, *Condensation, *Heat exchanger efficiency, *Refrigeration & refrigerating machinery, *Simulation software, *Energy conservation, *Vaporization
Abstract: Improving energy efficiency is a critical issue related to the boil-off gas phenomenon that occurs inside a cryogenic hydrocarbon fixed tank as a result of temperature differences between the tank and the surrounding climate. Software Aspen HYSYS and UniSim Design were used to model the re-liquefaction process by modifying the pure propane refrigeration closed loop, which represents a part of the reliquefaction process of butane, with an economizer heat exchanger. The inlet stream of the economizer will be divided into two inlets. The JT-valve will be fitted on one inlet to reduce the temperature and pressure of the stream, which will work as the cooling stream. The results of the modified process showed an improvement in the overall performance of the BOG re-liquefaction process, reducing the environmental impact of the refrigeration loop and saving consumed energy. Also, the operating conditions for the process after enhancement are nearly identical to the existing process. Butane recovered temperature after applying the modification is equal to -2°C, which is approximately equal to the butane storage temperature. The modification saves approximately 24% of the consumed power for the re-liquefaction process. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 187103865
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PubType: Academic Journal
PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Optimization of Butane Boil off Gas Re-Liquefaction Process Using Alternative Technique to Conventional Refrigeration System.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Ali%2C+Alaa+M%2E%22">Ali, Alaa M.</searchLink><relatesTo>1</relatesTo><i> Alaamamdouh865@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Omar%2C+Walaa+A%2E+E%2E%22">Omar, Walaa A. E.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Emam%2C+Eman+A%2E%22">Emam, Eman A.</searchLink><relatesTo>2</relatesTo>
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  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Petroleum+%26+Coal%22">Petroleum & Coal</searchLink>. 2025, Vol. 67 Issue 2, p574-587. 14p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Butane%22">Butane</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+consumption%22">Energy consumption</searchLink><br />*<searchLink fieldCode="DE" term="%22Condensation%22">Condensation</searchLink><br />*<searchLink fieldCode="DE" term="%22Heat+exchanger+efficiency%22">Heat exchanger efficiency</searchLink><br />*<searchLink fieldCode="DE" term="%22Refrigeration+%26+refrigerating+machinery%22">Refrigeration & refrigerating machinery</searchLink><br />*<searchLink fieldCode="DE" term="%22Simulation+software%22">Simulation software</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+conservation%22">Energy conservation</searchLink><br />*<searchLink fieldCode="DE" term="%22Vaporization%22">Vaporization</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Improving energy efficiency is a critical issue related to the boil-off gas phenomenon that occurs inside a cryogenic hydrocarbon fixed tank as a result of temperature differences between the tank and the surrounding climate. Software Aspen HYSYS and UniSim Design were used to model the re-liquefaction process by modifying the pure propane refrigeration closed loop, which represents a part of the reliquefaction process of butane, with an economizer heat exchanger. The inlet stream of the economizer will be divided into two inlets. The JT-valve will be fitted on one inlet to reduce the temperature and pressure of the stream, which will work as the cooling stream. The results of the modified process showed an improvement in the overall performance of the BOG re-liquefaction process, reducing the environmental impact of the refrigeration loop and saving consumed energy. Also, the operating conditions for the process after enhancement are nearly identical to the existing process. Butane recovered temperature after applying the modification is equal to -2°C, which is approximately equal to the butane storage temperature. The modification saves approximately 24% of the consumed power for the re-liquefaction process. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 574
    Subjects:
      – SubjectFull: Butane
        Type: general
      – SubjectFull: Energy consumption
        Type: general
      – SubjectFull: Condensation
        Type: general
      – SubjectFull: Heat exchanger efficiency
        Type: general
      – SubjectFull: Refrigeration & refrigerating machinery
        Type: general
      – SubjectFull: Simulation software
        Type: general
      – SubjectFull: Energy conservation
        Type: general
      – SubjectFull: Vaporization
        Type: general
    Titles:
      – TitleFull: Optimization of Butane Boil off Gas Re-Liquefaction Process Using Alternative Technique to Conventional Refrigeration System.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Ali, Alaa M.
      – PersonEntity:
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            NameFull: Omar, Walaa A. E.
      – PersonEntity:
          Name:
            NameFull: Emam, Eman A.
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          Dates:
            – D: 01
              M: 04
              Text: 2025
              Type: published
              Y: 2025
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              Value: 67
            – Type: issue
              Value: 2
          Titles:
            – TitleFull: Petroleum & Coal
              Type: main
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