PDF
Full
Outline
The combination of supercritical carbon dioxide Brayton cycle and lead cooled fast reactor is considered as one of the most ideal power cycles. The system transfers heat through the intermediate heat exchanger, and its performance affects the efficient and safe operation of the whole power generation system. Due to the significant differences in physical properties and heat mass transport properties between supercritical carbon dioxide and liquid lead bismuth eutectic, the symmetrical structure cannot match the heat transfer requirements of the working fluids on both sides. In this study, an asymmetric compact coupled heat exchanger was constructed, and the coupled heat transfer characteristics of supercritical carbon dioxide and liquid lead bismuth eutectic were studied by numerical simulation. Increasing the inlet velocity of the cold side fluid will significantly enhance the heat transfer; When the inlet velocity of LBE at the hot side is increased, the total heat transfer coefficient first decreases and then increases; When the inlet temperature of the cold and hot fluid of the heat exchanger is increased, the heat transfer coefficient of the heat exchanger first decreases and then increases, and there is an optimal value; Due to the high proportion of thermal resistance in the cold side, the similarities and differences of heat transfer characteristics of cold side supercritical carbon dioxide under buoyancy and thermal acceleration under different operating parameters are compared; It is found that in the quasi critical region, the strong buoyancy will greatly enhance the cold side heat transfer, while the acceleration effect will inhibit the heat transfer.
PDF
65
7
| 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 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
