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Fuel Cell Micro Turbine Combined Cycle_4

Tham khảo tài liệu 'fuel cell micro turbine combined cycle_4', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Simpo PDF Merge and Split Unregistered Version - http www.simpopdf.com 2.1.6 Modeling Approach and Methodology The overall approach used in this study was to use accepted chemical process engineering methodology. The overall process was modeled by using the commercially available ASPEN Plus process simulation software package. Major components were modeled rigorously. The fuel cell stacks were modeled within ASPEN using a rigorous FORTRAN model. The gas turbine compressor and turbine was modeled rigorously using the software package GATE CYCLE. The results from the rigorous model were compiled into a curve fit and the curve fit was incorporated into the ASPEN process simulation. The recuperator and fuel heater were also modeled separately and the results incorporated into the simulation. A simplified process flow diagram was generated for this report as shown in Figure 2. Also included is a simplified stream summary in Table 1 and a component duty summary in Table 4. A performance map was constructed using the method developed in Reference 4 to aid in analyzing the PSOFCs. Detailed stack models have been used to predict PSOFC response to changes in operating conditions. Integrated into a process model the results yield accurate predictions of system performance. Results from a number of cases may be assembled to construct performance maps. While these models provide detailed resolution of processes and conditions they are complex and cumbersome for operating point analysis and optimization. Since the performance of the system is highly dependent on the performance of the fuel cell stacks a more useful approach is to define relationships that govern stack performance. These relationships are then combined to create a closed form parametric model suitable for application in the construction of performance maps and operating point optimization and analysis. The governing performance parameters for PSOFC stacks are fuel flow area specific resistance and operating .