Design method for s-CO2 gas turbine power plants

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Design method for s-CO2 gas turbine power plants ( design-method-s-co2-gas-turbine-power-plants )

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2-3 Brayton recompression system 21 The parameters presented in Table 2-2 are used in this section and the Brayton recom- pression system is analyzed as a function of the compressor discharge pressure. The results are shown in Figure 2-16. Figure 2-16a presents the TIT. The temperatures obtained in this 810 805 800 795 790 785 780 200 250 300 350 400 P3 [bar] 150 140 130 120 110 100 90 200 250 300 350 400 P3 [bar] (a) Turbine inlet temperature. (b) CO2 mass flow. 99 98 97 96 95 94 93 92 91 90 200 250 300 350 400 P3 [bar] Low T. regenerator High T. regenerator 80 70 60 50 40 30 20 10 200 250 300 350 400 P3 [bar] Low T. regenerator High T. regenerator (c) Regenerator power. (d) Regenerator effectiveness. 0.36 0.34 0.32 0.3 0.28 0.26 0.24 200 250 300 350 400 P3 [bar] (e) Mass flow fraction α. Figure 2-16: Turbine inlet temperature, CO2 mass flow rate, regenerator power, regenerator effec- tiveness and mass flow fraction for the Brayton recompression system as a function of the compressor discharge pressure (ηTR = 50%, T2 = 31.25◦C, P2 = 74 bar, ηTR = 93.4%, ηCM1 = 85%, ηCM2 = 85%, ηHR = 90%, ∆PLS = 2%, ∆TPN = 10◦C). Master of Science Thesis J.S. Bahamonde Noriega α [–] Q ̇RG [MW] T4 [◦C] εRG [%] f [kg/s]

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