Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles
<p dir="ltr">With more than 150 billion m<sup>3</sup> of gases annually flared around the world, gas flaring is a major source of greenhouse gas emissions that contaminates the environment with more than 400 Mt CO<sub>2</sub>/year. Therefore, utilizing the fla...
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| المؤلف الرئيسي: | |
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| مؤلفون آخرون: | , |
| منشور في: |
2022
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| _version_ | 1864513548331253760 |
|---|---|
| author | Ahmad K. Sleiti (14778229) |
| author2 | Wahib A. Al-Ammari (17191519) Khaled M. Aboueata (17269027) |
| author2_role | author author |
| author_facet | Ahmad K. Sleiti (14778229) Wahib A. Al-Ammari (17191519) Khaled M. Aboueata (17269027) |
| author_role | author |
| dc.creator.none.fl_str_mv | Ahmad K. Sleiti (14778229) Wahib A. Al-Ammari (17191519) Khaled M. Aboueata (17269027) |
| dc.date.none.fl_str_mv | 2022-01-15T00:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1016/j.fuel.2021.121808 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Flare_gas-to-power_by_direct_intercooled_oxy-combustion_supercritical_CO_sub_2_sub_power_cycles/24420406 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Economics Econometrics Engineering Mechanical engineering Resources engineering and extractive metallurgy Flare gases Direct oxy-combustion Supercritical CO2 power cycle Thermoeconomic analysis Exergy and LCOE Multi-objective optimization |
| dc.title.none.fl_str_mv | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">With more than 150 billion m<sup>3</sup> of gases annually flared around the world, gas flaring is a major source of greenhouse gas emissions that contaminates the environment with more than 400 Mt CO<sub>2</sub>/year. Therefore, utilizing the flared gases efficiently becomes inescapable and one of the most promising utilization technologies is using Gas-to-Power (GTP). However, most of the available GTP technologies are still using conventional power cycles that have limited efficiencies and produce high-level of emissions. Herein, we use direct oxy-combustion (DOC) supercritical CO<sub>2</sub> (sCO<sub>2</sub>) power cycle, instead, to realize the desired no flaring-no emissions solution. Two innovative flared-intercooled sCO<sub>2</sub> power cycles that utilize flare gases and natural gas as fuel are introduced. In the first flared power cycle (FPC1), the flare gases are mixed with the natural gas before being combusted in the DOC. While in the second cycle (FPC2), the flare gases are used to perform a reheating process for the exhaust flow of the primary heater (DOC) after being partially expanded in a high-pressure turbine. Comprehensive energetic, exergetic, exergoeconomic, levelized cost of electricity (LCOE), and multi-objective optimization analyses are conducted for each configuration over practical ranges of operating conditions for six flare gas samples that significantly differ in their composition and specifications. A minimum LCOE of 5.02¢/kWh is achieved by sweet flare gas sample in FPC1 at <i>T</i><sub><em>max</em></sub> of 731 °C, <i>P</i><sub><em>max</em></sub> of 300 bar, <i>P</i><sub><em>min</em></sub> of 40 bar, <i>T</i><sub><em>min</em></sub> of 32 °C, and W<sub>net</sub> of 50 MW with energy efficiency of 45.10%. At the optimized conditions, FPC1 and FPC2 show superior energetic and economic performances compared to indirect-combustion power cycles, however, indirect combustion of flare gases may perform better than FPC2 at low capacities and therefore recommended for future work.</p><h2>Other Information</h2><p dir="ltr">Published in: Fuel<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.fuel.2021.121808" target="_blank">https://dx.doi.org/10.1016/j.fuel.2021.121808</a></p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_4badbdcc29147e263d6bc65dd8bf4ccc |
| identifier_str_mv | 10.1016/j.fuel.2021.121808 |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/24420406 |
| publishDate | 2022 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cyclesAhmad K. Sleiti (14778229)Wahib A. Al-Ammari (17191519)Khaled M. Aboueata (17269027)EconomicsEconometricsEngineeringMechanical engineeringResources engineering and extractive metallurgyFlare gasesDirect oxy-combustionSupercritical CO2 power cycleThermoeconomic analysisExergy and LCOEMulti-objective optimization<p dir="ltr">With more than 150 billion m<sup>3</sup> of gases annually flared around the world, gas flaring is a major source of greenhouse gas emissions that contaminates the environment with more than 400 Mt CO<sub>2</sub>/year. Therefore, utilizing the flared gases efficiently becomes inescapable and one of the most promising utilization technologies is using Gas-to-Power (GTP). However, most of the available GTP technologies are still using conventional power cycles that have limited efficiencies and produce high-level of emissions. Herein, we use direct oxy-combustion (DOC) supercritical CO<sub>2</sub> (sCO<sub>2</sub>) power cycle, instead, to realize the desired no flaring-no emissions solution. Two innovative flared-intercooled sCO<sub>2</sub> power cycles that utilize flare gases and natural gas as fuel are introduced. In the first flared power cycle (FPC1), the flare gases are mixed with the natural gas before being combusted in the DOC. While in the second cycle (FPC2), the flare gases are used to perform a reheating process for the exhaust flow of the primary heater (DOC) after being partially expanded in a high-pressure turbine. Comprehensive energetic, exergetic, exergoeconomic, levelized cost of electricity (LCOE), and multi-objective optimization analyses are conducted for each configuration over practical ranges of operating conditions for six flare gas samples that significantly differ in their composition and specifications. A minimum LCOE of 5.02¢/kWh is achieved by sweet flare gas sample in FPC1 at <i>T</i><sub><em>max</em></sub> of 731 °C, <i>P</i><sub><em>max</em></sub> of 300 bar, <i>P</i><sub><em>min</em></sub> of 40 bar, <i>T</i><sub><em>min</em></sub> of 32 °C, and W<sub>net</sub> of 50 MW with energy efficiency of 45.10%. At the optimized conditions, FPC1 and FPC2 show superior energetic and economic performances compared to indirect-combustion power cycles, however, indirect combustion of flare gases may perform better than FPC2 at low capacities and therefore recommended for future work.</p><h2>Other Information</h2><p dir="ltr">Published in: Fuel<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.fuel.2021.121808" target="_blank">https://dx.doi.org/10.1016/j.fuel.2021.121808</a></p>2022-01-15T00:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1016/j.fuel.2021.121808https://figshare.com/articles/journal_contribution/Flare_gas-to-power_by_direct_intercooled_oxy-combustion_supercritical_CO_sub_2_sub_power_cycles/24420406CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/244204062022-01-15T00:00:00Z |
| spellingShingle | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles Ahmad K. Sleiti (14778229) Economics Econometrics Engineering Mechanical engineering Resources engineering and extractive metallurgy Flare gases Direct oxy-combustion Supercritical CO2 power cycle Thermoeconomic analysis Exergy and LCOE Multi-objective optimization |
| status_str | publishedVersion |
| title | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles |
| title_full | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles |
| title_fullStr | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles |
| title_full_unstemmed | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles |
| title_short | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles |
| title_sort | Flare gas-to-power by direct intercooled oxy-combustion supercritical CO<sub>2 </sub>power cycles |
| topic | Economics Econometrics Engineering Mechanical engineering Resources engineering and extractive metallurgy Flare gases Direct oxy-combustion Supercritical CO2 power cycle Thermoeconomic analysis Exergy and LCOE Multi-objective optimization |