| Summary: | 碩士 === 國防大學中正理工學院 === 兵器系統工程研究所 === 96 === Due to the growing utilization of energy and the rising concern on the global warming issue, the development of a high efficiency fuel cell as an alternative power source for traditional power systems has recently caught worldwide interest, for its advantages in lower emission of pollutants and noises, and higher performance in use and easy in maintenance. Typical applications already can be found in many power plants, civil mass transportation systems, and in military power devices with a getting popular trend. Thus, the present thesis is dedicated to the development of a practical framework for assessing the performance of a SOFC/GT hybrid system, subjected to different system layouts and operating conditions. In approach, the study begins with an extensive collection of relevant research literatures and operating data of existing SOFC/GT hybrid systems; followed is a detailed analysis of the major components characteristics of a typical SOFC/GT system; then is the framework design for the system performance calculations; the last part consists of an assessment of the case study results and the key factors identification. Accordingly, a PC-based Windows program, CSJP-13, was first developed for doing the model simulations of a given SOFC/GT system. Based on the computed results and performance assessment, it was concluded that (1) the case of introducing additional atmosphere air to the GT may yield a higher power output for the whole system, (2) the waste heat recycle of the SOFC exhaust can be used to raise the turbine inlet temperature, (3) the system power output may be increased by raising the working pressure of the SOFC and GT, (4) the benefit of increasing the fuel flow can only be reflected on the GT power output, but not on the SOFC. Since the thesis is only focused on the preliminary development of a practical framework for use; thus, it is greatly encouraged to include other factors, such as the thermal efficiency of GT and the costs of manufacture and maintenance, for successive studies in order to yield a more refined version in the near future.
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