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Aiming at the problem of waste heat utilization of gas turbine, the technologies of intermediate cooling, intermediate reheating and split flow recompression were introduced into the supercritical carbon dioxide (S-CO2) power cycle with heat recovery and six cycle schemes were established. Taking the cycle efficiency and the cycle net output power of the S-CO2 cycle as the optimization objectives, the genetic algorithm was used to optimize the parameters of each scheme, and the earnings of optimization results were compared. The results show that the cycle efficiency can be improved in varying degrees by introducing one intermediate cooling, one intermediate reheat and one split flow recompression when the optimization goal is to maximize the cycle efficiency. The cycle efficiency of the sixth scheme that introduces one split flow recompression and one intermediate reheat is the highest, which reaches 43.29%. When the optimization goal is to maximize the net cycle output work, the introduction of primary intermediate cooling can increase the net output power, the introduction of primary intermediate reheating can reduce the net output power of the power cycle, and the one split recompression degenerates into no split scheme. The second scheme that introduces primary intermediate cooling has the largest net output power reaching 82 620.02 kW. When the cycle net output work is taken as the optimization objective, the economy of the six schemes is more advantageous because the waste heat utilization efficiency of gas turbine smoke exhaust is higher. The second scheme has the largest operating earnings in 20 years, which is RMB 5.065 billion.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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