PDF
Full
Outline
To improve the thermal management performance and solve the refrigerant carbon emissions issue of electric vehicle, this article proposed a transcritical CO2 heat pump air conditioning system suitable for electric vehicle with natural CO2 as refrigerant, and performance analysis was conducted. The results show that: this system can still ensure a heating capacity of 5 kW and 36 ℃ at the outlet in an environment of -20 ℃. As the compressor speed increases, the heating capacity increases, but Coefficient Of Performance (COP) decreases. The appropriate increment in the air volume of the internal gas cooler can effectively increase the heating capacity and COP, but excessive air volume will lead to low outlet air temperature, which is not conducive to heating. At ambient temperature of 40 ℃ and compressor speed of 7 000 r/min, the cooling capacity is 4.2 kW and the COP is 1.1. As the air volume of the internal evaporator increases, the cooling capacity and COP increase, indicating that the appropriate increment in air volume can effectively improve cooling performance.
PDF
198
90
| 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
