| 摘要: |
| 精馏是利用气液混合物中各组分挥发度的差异进行分离。本文研制的精馏型油分离器结合了传统油分离器的分离原理和精馏原理，以塔内恒定压力1 000 kPa、入口温度62 ℃、R134a和PAG的质量比为7:3的进料条件用Aspen软件进行模拟，模拟可得通过精馏过程可除去二元混合物中的润滑油。为验证该油分离器的实际可行性，搭建了测试油分离器效率的实验装置，分别研究了制冷剂循环流量和顶端冷量对油分离器分离效率的影响，实验可得在制冷剂质量流量为7.5 g/s、顶端冷量为200 W的条件下其油分离效率高达为99.967%。综合模拟和实验结果可得：将精馏原理引入油分离器用于制冷剂润滑油混合物的分离，可以提高油分离器的分离效果。经测试，精馏型油分离器的分离效率比传统的旋风式油分离器高9.17 %。 |
| 关键词: 油分离器 精馏 制冷循环 制冷剂 |
| DOI： |
| 投稿时间：2021-07-22 修订日期：2021-09-01
|
| 基金项目:国家自然科学基金（51376156）资助项目。 |
|
| Experimental Study of a Distillation-Type Oil Separator |
| Ge Junna,Tang Liming,Chen Guangming,Wu Han,Chen Qi |
| (Key Laboratory of Refrigeration and Cryogenic Technology of Zhejiang Province, Institute of Refrigeration and Cryogenics, Zhejiang University) |
| Abstract: |
| Distillation is the separation of components in a gas-liquid mixture using the difference in volatility. The distillation-type oil separator developed in this study combines the principles of traditional oil separation and distillation. The feed conditions of a constant pressure of 1 000 kPa in the tower, inlet temperature of 62 °C, and mass ratio of R134a and PAG of 7:3 were simulated using Aspen simulation software. The results show that the lubricating oil in the binary mixture can be removed by the distillation process. In this study an experimental setup was built to test the efficiency of the oil separator to verify its practical feasibility. The effects of the refrigerant circulation flow rate and the top cooling volume on the separation efficiency of the oil separator were investigated separately. The results showed that the oil separation efficiency was as high as 99.967% at a refrigerant mass flow rate of 7.5 g/s and a maximum cooling capacity of 200 W. From the experimental and simulation results, it was determined that introducing the distillation principle into the oil separator for the separation of the refrigerant-lubricant mixture can improve its separation efficiency. The separation efficiency of the distillation-type oil separator was 9.17 % higher than that of a conventional oil separator. |
| Key words: oil separator distillation refrigeration cycle refrigerant |
