PDF
Full
Outline
In order to solve the problem of incomplete utilization of waste heat in traditional solar thermal storage liquid air energy storage systems (LAESS) and further improve the roundtrip efficiency of the system, a liquid air energy storage system (LAESSO) coupled with solar thermal storage and a dual Organic Rankine Cycle on the basis of the LAESS system is developed. The thermodynamic model of the coupled system is established, and the influence of key parameters on system performance is analyzed. The results show that the net output power of subsystems ORC1 and ORC2 is 1 296 kW and 6 695.83 kW under typical operating conditions; the round trip efficiency of the new system can reach 117.63%; the exergy efficiency is 38.97%; and the energy efficiency is 28.88%, which are 12.58%, 2.35%, and 1.21% higher than those of the reference system, respectively. In addition, the system provides domestic hot water at a temperature of 364.15 K to the users, achieving cogeneration efficacy. Sensitivity analysis of key parameters shows that when the liquefaction pressure (compressor outlet pressure) increases from 15 MPa to 18 MPa and the liquefaction temperature (throttle inlet air temperature) rises from 93.15 K to 113.15 K, the air liquefaction rate, roundtrip efficiency, and exergy efficiency decrease with the increase of liquefaction pressure, and the increase of liquefaction pressure and temperature is not conducive to the system performance; however, when the exhaust pressure increases from 5.3 MPa to 7.7 MPa, the roundtrip efficiency and the exergy efficiency increases. The research results can provide some theoretical support for the liquidaircoupled solar system.
PDF
240
117
| 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
