Studies on Carbon Dioxide Cycles for Power Generation : 2nd Report, Discussion on Several Proposed Cycles

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This paper presents the performance characteristics of gas turbine cycles with supercritical back-pressure and several condensation cycles, using carbon dioxide as a working fluid. They are computed from the data on the thermodynamic properties of CO_2. As a result, it is shown that thermal efficiency in CO_2 cycles increases at the rate of ( 3 ~ 4 ) % in proportion to a turbine inlet temperature rise of 100 ℃ and is little affected by turbine inlet temperature rise of 100℃ and is little affected by turbine inlet pressure higher than 200 ata. Also, thermal efficiency of CO_2 gas turbine cycle with supercritical back-pressure is lower by ( 6 ~ 9 ) % than that of CO_2 condensation cycles. Some CO_2 condensation cycles exhibit a better performance than the conventional steam power-plant cycles at a turbine inlet pressure of about 250 ata and turbine inlet temperatures higher than 600 ℃.
社団法人日本機械学会の論文