A comprehensive evaluation of a novel integrated system consisting of hydrogen boil-off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and Markov analyses
The price of constructing hydrogen generation units is very high and sometimes it is not possible to build them in the desired location, so the transfer of hydrogen from the hydrogen generation system to the units that need it is justified. Since the storage of hydrogen gas needs a large volume and...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-11-01
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| Series: | Energy Reports |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484721014530 |
| _version_ | 1828011222522396672 |
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| author | Armin Ebrahimi Bahram Ghorbani Mostafa Delpisheh Mohammad Hossein Ahmadi |
| author_facet | Armin Ebrahimi Bahram Ghorbani Mostafa Delpisheh Mohammad Hossein Ahmadi |
| author_sort | Armin Ebrahimi |
| collection | DOAJ |
| description | The price of constructing hydrogen generation units is very high and sometimes it is not possible to build them in the desired location, so the transfer of hydrogen from the hydrogen generation system to the units that need it is justified. Since the storage of hydrogen gas needs a large volume and its transportation is very complex, so if hydrogen is stored in liquid form, this problem can be resolved. In transporting liquid hydrogen (LH2) over long distances, owing to heat transfer to the environment, the LH2 vaporizes, forming boil-off gas (BOG). Herein, in lieu of only reliquifying the BOG, this study proposes and assesses a system employing the BOG partially as feed for a novel liquefaction process, and also the remaining utilized in a proton exchange membrane fuel cell (PEMFC) to generate power. Using the cold energy of the onsite liquid oxygen utility of the LH2 cargo vessel, the mixed refrigerant liquefaction cycle is further cooled down. In this regard, by using 130 kg/h BOG as input, 60.37 kg/h of liquid hydrogen is produced and the rest enters PEMFC with 552.7 kg/h oxygen to produce 1592 kW of power. The total thermal efficiency of the integrated system and electrical efficiency of the PEMFC is 83.18% and 68.76%, respectively. Regarding the liquefaction cycle, its specific power consumption (SPC) and coefficient of performance (COP) were achieved at 3.203 kWh/kgLH 2 and 0.1876, respectively. The results of exergy analysis show that the exergy destruction of the whole system is 937.4 kW and also its exergy efficiency is calculated to be 58.38%. Exergoeconomic and Markov analyses have also been applied to the integrated system. Also, by changing the important parameters of PEMFC, its optimal performance has been extracted. |
| first_indexed | 2024-04-10T09:11:57Z |
| format | Article |
| id | doaj.art-3e22025ec0e941fba7197868709dc5ce |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T09:11:57Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-3e22025ec0e941fba7197868709dc5ce2023-02-21T05:09:46ZengElsevierEnergy Reports2352-48472022-11-01812831297A comprehensive evaluation of a novel integrated system consisting of hydrogen boil-off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and Markov analysesArmin Ebrahimi0Bahram Ghorbani1Mostafa Delpisheh2Mohammad Hossein Ahmadi3Faculty of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, IranFaculty of Engineering Modern Technologies, Amol University of Special Modern Technologies, Amol, IranSchool of Mechanical Engineering, Iran University of Science and Technology (IUST), Tehran, IranFaculty of Mechanical Engineering, Shahrood University of Technology, Shahrood, Iran; Corresponding author.The price of constructing hydrogen generation units is very high and sometimes it is not possible to build them in the desired location, so the transfer of hydrogen from the hydrogen generation system to the units that need it is justified. Since the storage of hydrogen gas needs a large volume and its transportation is very complex, so if hydrogen is stored in liquid form, this problem can be resolved. In transporting liquid hydrogen (LH2) over long distances, owing to heat transfer to the environment, the LH2 vaporizes, forming boil-off gas (BOG). Herein, in lieu of only reliquifying the BOG, this study proposes and assesses a system employing the BOG partially as feed for a novel liquefaction process, and also the remaining utilized in a proton exchange membrane fuel cell (PEMFC) to generate power. Using the cold energy of the onsite liquid oxygen utility of the LH2 cargo vessel, the mixed refrigerant liquefaction cycle is further cooled down. In this regard, by using 130 kg/h BOG as input, 60.37 kg/h of liquid hydrogen is produced and the rest enters PEMFC with 552.7 kg/h oxygen to produce 1592 kW of power. The total thermal efficiency of the integrated system and electrical efficiency of the PEMFC is 83.18% and 68.76%, respectively. Regarding the liquefaction cycle, its specific power consumption (SPC) and coefficient of performance (COP) were achieved at 3.203 kWh/kgLH 2 and 0.1876, respectively. The results of exergy analysis show that the exergy destruction of the whole system is 937.4 kW and also its exergy efficiency is calculated to be 58.38%. Exergoeconomic and Markov analyses have also been applied to the integrated system. Also, by changing the important parameters of PEMFC, its optimal performance has been extracted.http://www.sciencedirect.com/science/article/pii/S2352484721014530Boil-off gasHydrogen liquefaction cyclePEMFCExergoeconomic analysisMarkov analysis |
| spellingShingle | Armin Ebrahimi Bahram Ghorbani Mostafa Delpisheh Mohammad Hossein Ahmadi A comprehensive evaluation of a novel integrated system consisting of hydrogen boil-off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and Markov analyses Energy Reports Boil-off gas Hydrogen liquefaction cycle PEMFC Exergoeconomic analysis Markov analysis |
| title | A comprehensive evaluation of a novel integrated system consisting of hydrogen boil-off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and Markov analyses |
| title_full | A comprehensive evaluation of a novel integrated system consisting of hydrogen boil-off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and Markov analyses |
| title_fullStr | A comprehensive evaluation of a novel integrated system consisting of hydrogen boil-off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and Markov analyses |
| title_full_unstemmed | A comprehensive evaluation of a novel integrated system consisting of hydrogen boil-off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and Markov analyses |
| title_short | A comprehensive evaluation of a novel integrated system consisting of hydrogen boil-off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and Markov analyses |
| title_sort | comprehensive evaluation of a novel integrated system consisting of hydrogen boil off gas reliquifying process and polymer exchange membrane fuel cell using exergoeconomic and markov analyses |
| topic | Boil-off gas Hydrogen liquefaction cycle PEMFC Exergoeconomic analysis Markov analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2352484721014530 |
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