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Chapter 3 describes the computational models that were used to obtain the cycle performance results. It describes the heat transfer and pressure drop models used for the design of heat exchangers and the methodology used for the design of different heat exchangers. The compression and expansion processes evaluation is presented here as well. The basic iteration and optimization schemes used to obtain the final results for different cycle layouts and the description of the code CYCLES developed by the author for the thermodynamic analysis of different closed cycle gas turbine cycles are discussed last. For the example of the simple Brayton cycle Chapter 4 demonstrates the optimization methodology for the closed cycle gas turbine cycles used in this work. In addition Chapter 4 investigates different Brayton cycle layouts with and without re- heating and inter-cooling and assesses the potential of re-heating and inter-cooling for the supercritical CO2 cycles. Chapter 5 searches for the best-suited cycle layout among the compound cycles. The previous analysis of Angelino is used as the basis for the selection of the reference cycle layout. The recompression cycle is sorted out as the most promising cycle layout that is used in the rest of this work for establishment of the reference supercritical CO2 cycle design. Chapter 6 investigates the behavior of the recompression cycle. The optimum heat exchanger volume with respect to the plant capital cost in $/kWe is selected. Different operating conditions are investigated to establish the reference cycle design. The effect of intermediate heat exchanger (or reactor) and re-heaters pressure drop on the recompression cycle efficiency is investigated and the results are used in Chapter 7 on the indirect cycle. Chapter 7 presents the methodology for the optimization of the intermediate heat exchangers with respect to the plant capital cost in $/kWe. The helium and lead alloy primary systems are evaluated. The reactor inlet and outlet temperatures are optimized. The effect of re-heat on plan capital cost is investigated as well. 7PDF Image | Advanced Nuclear Power Technology Program A Supercritical Carbon Dioxide Cycle for Next Generation Nuclear Reactors
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