Full
Outline
To address the issues of insufficient heat transfer capacity and operational instability during the operation of high‑pressure vaporizers，the core equipment of ship fuel gas supply systems，an anti‑icing ultra‑supercritical LNG high‑pressure vaporizer with a cold‑to‑hot plate distribution ratio of 1：3 was designed.A test facility for studying the heat transfer and flow performance of supercritical nitrogen-50% ethylene glycol water solution （50% EGW） was constructed.The effects of cold and hot side inlet flow rates on heat transfer and flow resistance characteristics were investigated，and the freezing risk during operation was dynamically assessed.The experimental results show that when the supercritical nitrogen inlet flow rate increased from 400 kg/h to 1 000 kg/h，the maximum temperature drop at the hot side outlet reached 5.93 ℃，while the average heat transfer capacity and overall heat transfer coefficient increased by 147.3% and 246.9%，respectively.Concurrently，the total pressure drop on the supercritical nitrogen side increased by 160 kPa （a 57% rise in friction factor）.In contrast，when the 50% EGW flow rate varied within the range of 10 669~17 071 kg/h，the heat transfer capacity remained stable，with the friction factor increasing by only 5.7%.When the hot side fluid of the high‑pressure vaporizer approached the freezing state，the heat transfer performance deteriorated significantly.This study reveals the heat transfer enhancement mechanisms and flow resistance evolution laws of high‑pressure vaporizers under supercritical conditions，providing a theoretical basis and data support for the structural optimization and anti‑icing design of high‑pressure vaporizers.
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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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