能源是工業文明的基礎。根據經濟部能源局統計，台灣每年使用的能源超過98 %自國外進口，而2005年《京都議定書》正式生效後，能源成本不斷上升。種種外在因素使我國能源政策以積極推動節約能源、提高轉換效率、減少二氧化碳為研究目標。氫能源技術中的固態氧化物燃料電池結合渦輪機分散發電模式估計具70 %效率之開發潛力，比現今大規模使用的石化火力發電更適合成為下世代發電技術。
本論文主題係探討新一代能源科技：固態氧化物燃料電池(solid oxide fuel cell, SOFC)，其運轉所排出之高溫廢氣可被氣渦輪機(gas turbine, GT)利用進行二次發電，此混成(hybrid)發電模式可提高整體系統之熱利用率，達到減少能源使用量，提高發電效率之要求。本論文利用自行開發之Fortran數值模型，進行上述兩發電系統之混成性能模擬與尺寸匹配分析，結果發現在不增加額外部件下，常壓型混成系統仍可達到接近加壓型系統之高效率。

Energy plays a vital role in national industrial development. Over 98 % demand of energy in Taiwan is imported. Besides, cost of energy rises rapidly since Kyoto Protocol was effective in February 2005. For reasons that make government actively promoting a policy of energy conservation, including reduction of carbon dioxide emission, new transformation technology research, etc. Solid oxide fuel cell/gas turbine hybrid system has been predicted with potential of reaching 70 % efficiency, is one of the best choices to be the candidate of next generation power resource.
This thesis is focused on a hybrid fuel cell/gas turbine power system with pressurized and atmospheric solid oxide fuel cell (SOFC). The exhausted heat of fuel cell stack is capable to be used by a gas turbine. Such a hybrid system can raise heat utilization and reduce energy consumption. In this research, we developed a numerical Fortran model to proceed the hybrid power plant simulation and system parameter analysis. The final result shows with on additional balance of plant equipment required, high efficiency atmospheric hybrid system is possible achieved compared with a pressurized system.

[1] 何明析，”獨立運轉固態氧化物燃料電池/微渦輪機混成發電系統之概念設計”，清華大學，中華民國九十五年七月。
[2] 江宜哲，”生質柴油微型渦輪機發電系統性能測試”，清華大學，中華民國九十五年七月。
[3] F.S. Bhinder, Munzer S.Y. Edaid, Moh’d Yazid F. Mustafa, Raj .K. Calay, Mohammed H. Kailani, ”Parametric study of the combined fuel cell-gas turbine power plant”, ASME Turbo Expo 2006: Power for Land, Sea, and Air.
[4] Kazuo Onda, Toru Iwanari, Nobuhiro Miyauchi, Kohei Ito, Tahiro Ohba, Yoshinori Sakaki, Susumu Nagata “Cycle Analysis of Combined Power Generation by Planar SOFC and Gas Turbine Considering Cell Temperature and Current Density Distributions.”, Journal of The Electrochemical Society, (2003)
[5] H Cohen, GFC Rogers, HIH Saravanamuttoo “Gas Turbine Theory 4th”, (1996)
[6] Jack D. Mattingly “Elements of Gas Turbine Propulsion”, McGraw-Hill, Inc., (1996)
[7] 黃鎮江，”燃料電池”，華科技圖書股份有限公司，(2003)
[8] 莊茂雍，”熱回收式微形渦輪機發電系統之性能測試與比較”，清華大學，中華民國九十四年七月。
[9] Stephen R. Turns “An Introduction to Combustion”, McGraw-hill, (2000)
[10] Jens Palsson “Thermodynamic Modelling and Performance of Combined Solid Oxide Fuel Cell and Gas Turbine Systems.”, Doctoral Thesis, Lund University, Sweden, May, 2002
[11] E. Achenbach, “Three-Dimensional and Time Dependent Simulation of a Planar Solid Oxide Fuel Cell Stack ”, Journal of Power Sources, vol.49, pp.333-348, (1994)
[12] K. Nishida, T. Takage, S. Kinoshita, T. Tsuji, “Performance evaluation of multi-stage SOFC and gas turbine combined systems”, in: Proceeding of ASME TURBO EXPO 2002, Amsterdam, The Netherlands, June 3-6 (2002)
[13] 陳中生、邱耀平、曾錦清、周世同、陳孝輝，”平板狀SOFC電池元件之建立及模擬”，INER-2495，核能研究所，中華民國九十二年十月。
[14] 洪文堂、蔡禹擎、吳思翰、邱耀平，“固態氧化物燃料電池BOP之 規畫及熱氣測試平台之建置”，第二十二屆機械工程研討會，中華民國九十四年十一月。
[15] Rainer Kurz,”Gas Turbine Performance”, System analysis and Field testing for Solar turbine, Incorporated, San Diego, California.
[16] D. A. Noren, M.A. Hoffman, “Clarifying the Butler-Volmer equation and relate appromixmation for calculating activation losses in solid oxide fuel cell mdels”, Journal of Power Sources, vol. 152, pp.175-181, (2005)
[17] P. Aguiar, C.S. Adjiman, N. P. Brandon, “Anode supported intermediate temperature direct internal reforming solid oxide fuel cell. Ⅰ: model –based steady-state performance”, Journal of Power Sources, vol. 138, pp120-136, (2004)
[18] S.H. Chan, K.A. Khor, Z.T. Xia, ”A complete polarization model of a solid fuel cell and its sensitivity to the change of cell component thickness”, Journal of Power Sources, vol. 93, pp.130-140, (2001)
[19] H. Yoshizumi, K. Takeishi, S. Kinoshita, “SOFC/MGT using Cheng cycle for high efficiency micro-cogeneration systems”, Proceeding of ISTP-16, PRAGUE, Czech Republic, (2005)
[20] T. Araki, T. ohba, T. Ohba, S. Takezawa, K. Onda, Y. Sakaki, “Cycle analysis of planar SOFC power generation with serial connection of low and high temperature SOFCs.”, Journal of Power Sources, vol. 158, pp.52-59. (2006)
[21] Rory Roberts, Jack Brouwer, Faryar Jabbari, Tobias Junker and Hossein Ghezel-Ayagh, “Control design of an atmospheric solid oxide fuel cell/gas turbine hybrid system: Variable versus fixed speed gas turbine operation”, Journal of Power Sources, vol. 161, pp. 484-491. (2006)
[22] S.K. Park, K.S. Oh, T.S. Kim, “Analysis of the design of a pressurized SOFC hybrid system using a fixed gas turbine design”, Journal of Power Sources, (2007)