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Study on a Novel SFOC/GT Hybrid Cycle System With CO2 Capture

[+] Author Affiliations
Liqiang Duan, Yongping Yang, Binbin He, Gang Xu

North China Electric Power University, Beijing, China

Paper No. IMECE2010-37597, pp. 233-242; 10 pages
doi:10.1115/IMECE2010-37597
From:
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4429-8
  • Copyright © 2010 by ASME

abstract

A novel SOFC/GT hybrid cycle system with CO2 capture is proposed based on the typical topping cycle SOFC/GT hybrid system. The H2 gas is separated from the mixed gas of SOFC anode outlet by employing the advanced ceramics proton membrane technology, and then it is injected into the afterburner. The combustion production gas of the afterburner expands in the turbine. The SOFC anode outlet gas employs the oxy-fuel combustion mode in another burner after H2 gas is separated. Then, the oxy-fuel combustion production gas expands in another micro turbine. In order to ensure the flue gas temperature not exceed the maximum allowed temperature of the micro turbine, steam is injected into the oxy-fuel burner. The outlet gas of the oxy-fuel burner contains all the CO2 gas of the system. When the steam is removed by condensation, the CO2 gas can be captured. The steam generated by waste heat boiler is used to drive refrigerator and make CO2 gas liquefied at a lower temperature. The performance of the novel quasi-zero CO2 emission SOFC/GT hybrid cycle system is studied with a case study. The effect of CO2 liquefaction temperature and the oxygen production energy consumption on the new hybrid cycle system performance are investigated. Compared with the other quasi-zero CO2 emission power systems, the new system has the highest efficiency. The research achievements will provide the valuable reference for further study of quasi-zero CO2 emission power system with high efficiency.

Copyright © 2010 by ASME

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