| 摘要: |
| CO2作为一种安全、高效且环境友好的自然工质，是未来汽车空调制冷剂替代方案的重要选择。考虑到CO2系统制冷剂泄漏导致乘员舱气体体积分数超标的舒适及安全问题，本文使用三维仿真软件STAR-CCM+搭建乘员舱CO2制冷剂泄漏仿真模型，仿真分析两种不同泄漏速率和泄漏圆孔孔径下乘员舱乘客面部测点CO2体积分数的动态变化情况。在50 g/s的高CO2泄漏速率下，面部CO2体积分数在泄漏完成时能够达到9%以上，需要切换送风模式提供新风来降低乘员舱内CO2体积分数；在0.1 g/s的低CO2泄漏速率下，泄漏完成时面部CO2体积分数不超过3%，处于呼吸安全区范围。 |
| 关键词: CO2 热泵空调 泄漏特性 制冷剂 |
| DOI： |
| Received:October 09, 2022Revised:December 17, 2022 |
| 基金项目:国家自然科学基金（52006161,52006162）、博士后创新人才支持计划（BX20190270）资助项目 |
|
| Simulation Research on Leakage of Vehicle CO2 Air Conditioning System |
|
Zong Shuo, Yin Xiang, Huang Longfei, Song Yulong, Cao Feng
|
| (School of Energy and Power Engineering, Xi’an Jiaotong University) |
| Abstract: |
| As a safe, efficient, and environmentally friendly natural working fluid, CO2 is the primary choice for future automotive air conditioners. To consider the comfort and safety problem of an excessive CO2 volumetric concentration in the passenger cabin caused by refrigerant leakage, the 3D simulation software STAR-CCM+ was used to build a CO2 refrigerant leakage model in the passenger compartment. Simulations and analyses of the dynamic changes in CO2 volumetric fraction in the passenger compartment facial measurement points for two different leakage rates and leakage orifice diameters were performed. At a high CO2 leakage rate of 50 g/s, the CO2 volumetric fraction on the face can reach more than 9% when the leakage is completed. The air supply mode must be switched to provide fresh air and reduce the CO2 volumetric fraction in the passenger cabin. At a low CO2 leakage rate of 0.1 g/s, the facial CO2 volumetric fraction does not exceed 3%, which is safe for breathing, when the leakage is completed. |
| Key words: CO2 heat-pump air conditioner leakage characteristics refrigerant |
