Operating pressure dependence of the pressurized oxy-fuel combustion power cycle
Oxy-fuel combustion technology is an attractive option for capturing carbon dioxide (CO2) in power generation systems utilizing hydrocarbon fuels. However, conventional atmospheric oxy-fuel combustion systems require substantial parasitic energy in the compression step within the air separation unit...
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| Format: | Article |
| Language: | en_US |
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Elsevier
2016
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| Online Access: | http://hdl.handle.net/1721.1/105420 https://orcid.org/0000-0001-8730-272X |
| _version_ | 1826208595366117376 |
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| author | Gazzino, Marco Hong, Jongsup Field, Randall Ghoniem, Ahmed F |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Gazzino, Marco Hong, Jongsup Field, Randall Ghoniem, Ahmed F |
| author_sort | Gazzino, Marco |
| collection | MIT |
| description | Oxy-fuel combustion technology is an attractive option for capturing carbon dioxide (CO2) in power generation systems utilizing hydrocarbon fuels. However, conventional atmospheric oxy-fuel combustion systems require substantial parasitic energy in the compression step within the air separation unit (ASU), the flue gas recirculation system and the carbon dioxide purification and compression unit (CPU). Moreover, a large amount of flue gas latent enthalpy, which has high water concentration, is wasted. Both lower the overall cycle efficiency. Pressurized oxy-fuel combustion power cycles have been investigated as alternatives. Our previous study showed the importance of operating pressure for these cycles. In this paper, as the extended work of our previous study, we perform a pressure sensitivity analysis to determine the optimal combustor operating pressure for the pressurized oxy-fuel combustion power cycle. We calculate the energy requirements of the ASU and the CPU, which vary in opposite directions as the combustor operating pressure is increased. We also determine the pressure dependence of the water-condensing thermal energy recovery and its relation to the gross power output. The paper presents a detailed study on the variation of the thermal energy recovery rate, the overall compression power demand, the gross power output and the overall net efficiency. |
| first_indexed | 2024-09-23T14:08:07Z |
| format | Article |
| id | mit-1721.1/105420 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:08:07Z |
| publishDate | 2016 |
| publisher | Elsevier |
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| spelling | mit-1721.1/1054202022-09-28T18:47:29Z Operating pressure dependence of the pressurized oxy-fuel combustion power cycle Gazzino, Marco Hong, Jongsup Field, Randall Ghoniem, Ahmed F Massachusetts Institute of Technology. Department of Mechanical Engineering MIT Energy Initiative Hong, Jongsup Field, Randall Ghoniem, Ahmed F Oxy-fuel combustion technology is an attractive option for capturing carbon dioxide (CO2) in power generation systems utilizing hydrocarbon fuels. However, conventional atmospheric oxy-fuel combustion systems require substantial parasitic energy in the compression step within the air separation unit (ASU), the flue gas recirculation system and the carbon dioxide purification and compression unit (CPU). Moreover, a large amount of flue gas latent enthalpy, which has high water concentration, is wasted. Both lower the overall cycle efficiency. Pressurized oxy-fuel combustion power cycles have been investigated as alternatives. Our previous study showed the importance of operating pressure for these cycles. In this paper, as the extended work of our previous study, we perform a pressure sensitivity analysis to determine the optimal combustor operating pressure for the pressurized oxy-fuel combustion power cycle. We calculate the energy requirements of the ASU and the CPU, which vary in opposite directions as the combustor operating pressure is increased. We also determine the pressure dependence of the water-condensing thermal energy recovery and its relation to the gross power output. The paper presents a detailed study on the variation of the thermal energy recovery rate, the overall compression power demand, the gross power output and the overall net efficiency. Aspen Technology, Inc. Thermoflow Inc. ENEL (Firm) 2016-11-22T18:50:15Z 2016-11-22T18:50:15Z 2010-08 2010-07 Article http://purl.org/eprint/type/JournalArticle 03605442 http://hdl.handle.net/1721.1/105420 Hong, Jongsup, Randall Field, Marco Gazzino, and Ahmed F. Ghoniem. "Operating pressure dependence of the pressurized oxy-fuel combustion power cycle." Energy 35:12 (December 2010), pp. 5391-5399. https://orcid.org/0000-0001-8730-272X en_US http://dx.doi.org/10.1016/j.energy.2010.07.016 Energy Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Ghoniem via Angie Locknar |
| spellingShingle | Gazzino, Marco Hong, Jongsup Field, Randall Ghoniem, Ahmed F Operating pressure dependence of the pressurized oxy-fuel combustion power cycle |
| title | Operating pressure dependence of the pressurized oxy-fuel combustion power cycle |
| title_full | Operating pressure dependence of the pressurized oxy-fuel combustion power cycle |
| title_fullStr | Operating pressure dependence of the pressurized oxy-fuel combustion power cycle |
| title_full_unstemmed | Operating pressure dependence of the pressurized oxy-fuel combustion power cycle |
| title_short | Operating pressure dependence of the pressurized oxy-fuel combustion power cycle |
| title_sort | operating pressure dependence of the pressurized oxy fuel combustion power cycle |
| url | http://hdl.handle.net/1721.1/105420 https://orcid.org/0000-0001-8730-272X |
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