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With the rapid advancement of renewable energy power generation, thermal power units need to take on major peaking tasks. Molten salt thermal storage technology, as a prominent method for thermal power peaking, can effectively improve peaking performance of the units. The Ebsilon software is employed to model a subcritical 300 MW unit integrated with coupled molten salt thermal storage system. Considering the operational conditions of supplying industrial steam to external entities, several indexes such as the storage/exothermic thermal efficiency, load variation and thermoelectric conversion rate of three heat storage/exothermic schemes are investigated comparatively. The results indicates that, during the heat storage process, the heat storage scheme 3 (the heat source for heat storage is the main steam, reheat steam and medium-pressure cylinder exhaust, and the exothermic medium-pressure cylinder exhaust goes directly to the condenser) exhibits the highest load variation, reaching up to 102.63 MW. Meanwhile, the heat storage scheme 1 (employing main steam and reheat steam as the heat source for storage) demonstrates the superior thermal efficiency at 28.76%. During the discharge process, exothermic scheme 2 (heat from high-temperature molten salt is used to supply industrial steam and preheat condensate) has the largest load variation, release thermal efficiency, and thermoelectricity conversion rate, which are 34.69 MW, 46.14%, and 59.07%, respectively. This study can provide theoretical guidance for the study of peak performance and thermal economy of thermal power units coupled with molten salt thermal storage system.
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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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