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Aiming at the impact of thermal stratification on storage, the Fourzone storage model is proposed and Helmholtz energy equation is used to calculate the thermal properties of hydrogen in the study. According to different experimental conditions, the Nusselt number correlation formula is proposed, and the heat transfer coefficient of condensation surface is modified, and the modified Fourzone model is built. Compared with the experimental data, the error of the modified model is less than 3%, which has higher accuracy. On this basis, the influence of different filling ratio on selfpressurized storage is studied. The result shows that with the increase of filling ratio, the selfpressurized rate of storage tank first slows down and then becomes faster. There is an optimal filling ratio when liquid hydrogen is stored at low temperature, which makes the safe storage time the longest.
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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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