Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지
DOI QR코드

DOI QR Code

A study on characteristics of SOFC/GT system for the supply gas flow rates

공급가스 유량에 따른 SOFC/GT 시스템 특성에 관한 연구

  • Park, Sang-Kyun (Division of Marine Information Technology, Korea Maritime and Ocean University) ;
  • Lee, Joo-Hee (Space Science Research Team, Korea Aerospace Research Institute) ;
  • Park, Geong-Dae (Maritime Safety Reserarch Center, Korea Ship Safety Technology Authority) ;
  • Choi, Jae-Hyuk (Division of Marine System Engineering, Korean Maritime and Ocean University)
  • Received : 2015.08.12
  • Accepted : 2015.09.15
  • Published : 2015.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this research, the characteristics of SOFC/GT (Solid Oxide Fuel Cell/Gas Turbine) system temperature, stack power and system efficiency for flow rates of air, CH4 and water supplied to SOFC stack have been investigated. The temperature of the gas supplied to cathode and anode of SOFC stack in the SOFC/GT system are maintained by utilizing exhaust gas without the addition of external heat source. As a result, within the scope of this study, temperatures of gas supplied to cathode and anode of SOFC stack were maintained at 1000 (K) by utilizing the exhaust gas of the SOFC/GT system without the addition of external heat source. The system efficiency is increased with increase of air flow rate supplied to the stack and with decrease of $CH_4$ flow rate supplied to the stack. In addition, it can be found that the flow rate of the exhaust gas supplied to the turbine had a significant effect on the system efficiency. And the efficiencies of SOFC stack and SOFC/GT system depending upon various operating conditions of the SOFC/GT system is 51~57% and 57~73%, respectively.

본 연구는 SOFC/GT(Solid Oxide Fuel Cell/Gas Turbine)시스템의 SOFC 스택으로 공급되는 공기, 메탄 및 물의 유량변화에 따른 SOFC/GT시스템의 온도, 스택 출력 및 시스템 효율의 특성에 관하여 조사하였다. 이 때 SOFC 스택의 애노드 및 캐소드로 공급되는 가스 온도는 외부 열원의 추가 없이 시스템에서 배출되는 배기가스를 활용하여 일정하게 유지하였다. 그 결과 본 연구의 범위 내에서 외부 열원의 추가 없이 SOFC/GT시스템의 배기가스를 활용하여 SOFC 스택으로 공급되는 애노드 및 캐소드 가스 공급온도를 1000(K)로 일정하게 유지하는 것이 가능하였다. 시스템 효율은 공급 공기 유량은 많을수록, 공급 메탄 유량은 적을수록 높아짐을 알 수 있었고, 터빈으로 공급되는 배기 가스의 유량이 시스템 효율에 큰 영향을 미침을 알 수 있었다. 또한, SOFC/GT시스템의 운전 조건에 따라서 SOFC 스택 효율은 51~57%, 시스템 효율은 57~73%의 값을 얻을 수 있었다.

Keywords

References

  1. International Maritime Organization(IMO), Report of the Marine Environment Protection Committee on its 65th Session, 2013.
  2. Korean Register of Shipping, "KR Technical Report 2012", 2012.
  3. E. Fontell, "Wartsila Fuel Cell Development Program," The 8th annual Green Ship Technology Conference, 2011.
  4. Fellowship project, www.vikinglady.no, Accessed August 05, 2015.
  5. e4ship project, www.e4ships.de, Accessed August 05, 2015.
  6. International Maritime Organization (IMO), Sub-committee on Bulk Liquids and Gases 16th Session, Development of International Code Safety for Ships Using Gases or Other Low Flashpoint Fuels, Report of the Correspondence Group, 2011.
  7. S. K. Park "A study on temperature characteristic of the gases supplied to SOFC system by utilizing the ship exhaust gas," Journal of the Korean Society of Marine Engineering, vol. 37, no. 8, pp. 822-828, 2013 (in Korean). https://doi.org/10.5916/jkosme.2013.37.8.822
  8. F. Zabihian and A. Fung, "A review on modeling of hybrid solid oxide fuel cell systems," International Journal of Engineering, vol 3, no. 2, pp. 85-119, 2009.
  9. C. Strazza, A. Del Borghi, P. Costamagna, A. Traverso, and M. Santin, "Comparative LCA of methanol- fuelled SOFCs as auxiliary power systems on-board ships," Applied Energy, vol. 87, pp. 1670-1678, 2010. https://doi.org/10.1016/j.apenergy.2009.10.012
  10. L. K C. Tse, S. Wilkins, N. McGlashan, B. Urban, and R. M. Botas, "Solid oxide fuel cell/gas turbine trigeneration system for marine applications," Journal of Power Sources, vol. 196, no. 6, pp. 3149-3162, 2011. https://doi.org/10.1016/j.jpowsour.2010.11.099
  11. W. Jiang, R. Fang, J. A. Khan, and R. A. Dougal, "Parameter setting and analysis of a dynamic tubular SOFC model," Journal of Power Sources, vol. 162, no. 1, pp. 316-326, 2006. https://doi.org/10.1016/j.jpowsour.2006.06.086
  12. S. K. Park and M. E. Kim, "A study on thermal management of stack supply gas of solid oxide fuel cell system for ship applications," Journal of the Korean Society of Marine Engineering, vol. 35, no. 6, pp. 765-772, 2011 (in Korean). https://doi.org/10.5916/jkosme.2011.35.6.765
  13. EUtech Scientific Engineering, Simulation toolbox for the design and development of thermodynamic system in MATLAB/Simulink, 2009.
  14. Y. A. Cengel, Heat Transfer : A practical Approach, Korean Language Edition Copyright ${(c)}$ 1999 by McGraw-Hill Book Co.-Sigapore, 1999.