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Title Page
Contents
Abstract 7
CHAPTER I. INTRODUCTION 14
CHAPTER II. LITERATURE REVIEW 24
2.1. Integrative cogeneration processes 24
2.2. Integrative polygeneration processes 29
CHAPTER III. METHODOLOGY 33
3.1. Process simulation 33
3.1.1. Solid Oxide Fuel Cell modelling 33
3.1.2. Calculation of cell voltage, required fresh fuel, and cell efficiency 36
3.1.3. Heat generation calculation 40
3.2. Heat integration and bottom cycling 40
3.3. Techno-economic model 41
3.4. Scenarios 44
CHAPTER IV. COGENERATION / COMBINED HEAT AND POWER (CHP) PROCESS DESIGN AND ANALYSIS 46
4.1. Process description 46
4.1.1. Biomass pre-treatment and biogas production 46
4.1.2. Biogas pre-treatment 50
4.1.3. SOFCs 51
4.1.4. Gas Turbine (GT) 51
4.1.5. Organic Rankine Cycle 52
4.1.6. Utilities 53
4.2. Simulation results 53
4.3. Techno-economic analysis 57
4.3.1. Capital and investment costs 61
4.3.2. Sensitivity analysis 66
CHAPTER V. POLYGENERATION / COMBINED HYDROGEN, HEAT, AND POWER (CHHP) PROCESS DESIGN AND ANALYSIS 68
5.1. Process description 68
5.1.1. Biogas pre-treatment 70
5.1.2. SOFC 70
5.1.3. Hydrogen production 72
5.1.4. ORC 73
5.2. Simulation results 73
5.3. Techno-economic analysis 77
5.3.1. Capital and investment costs 79
5.3.2. Sensitivity analysis 83
CHAPTER VI. CONCLUSIONS 85
REFERENCES 88
요약 98
Table 1. Differences between fuel cell types. 17
Table 2. Economic parameters for discounted cash flow... 43
Table 3. Biogas Composition. 49
Table 4. Simulation results for the CHP process. 55
Table 5. Plant electricity distribution between process units. 56
Table 6. BESP per scenario for the CHP process. 59
Table 7. Comparison of results for the biogas-powered... 60
Table 8. Plant cost worksheet for total capital investment... 63
Table 9. Anode exhaust components. 71
Table 10. Simulation results for the CHHP process. 75
Table 11. Plant electricity distribution between process... 76
Table 12. BESP per scenario for the CHHP process. 78
Table 13. Plant cost worksheet for total capital... 80
Figure 1. Illustration of SOFC stack operation. Blue... 18
Figure 2. SOFC system target parameters. 23
Figure 3. Flowchart depicting the SOFC voltage... 39
Figure 4. Process flow diagram of the cogeneration process. 48
Figure 5. TIC breakdown for the CHP process 64
Figure 6. Cost contribution details from each process area to the BESP for the CHP process. 65
Figure 7. Impact of variation in the techno-economic model... 67
Figure 8. Process flow diagram of the proposed CHHP process. 69
Figure 9. Purchase equipment cost breakdown for the CHHP process 81
Figure 10. Cost contribution of each process area towards the BESP for the CHHP process 82
Figure 11. Impact of variation of the techno-economic model... 84
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