Experimental Research on Dissolution Characteristics of R474A and R479A in Lubrication Oils

LIU Jianchen; WANG Tianhao; JIN Xiao; XU Dongwei; NIE Hao; KEI Yamamoto; DAI Xiaoye; SHI Lin

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Experimental Research on Dissolution Characteristics of R474A and R479A in Lubrication Oils

更新时间：2025-06-04

- Experimental Research on Dissolution Characteristics of R474A and R479A in Lubrication Oils
- Moren Journal (2025)
- 作者机构：
  
  1.清华大学热科学与动力工程教育部重点实验室,北京市北京市100084
  2.大金氟化工（中国）有限公司常熟,江苏省苏州市215522
- 作者简介：
- 基金信息：
  
  the National Natural Science Foundation of China(52176011)
- DOI：
  CLC： TB61⁺2;TB64
- Received：09 April 2025，
  
  Revised：25 April 2025，
  
  Accepted：13 May 2025，
- 稿件说明：
移动端阅览
LIU Jianchen, WANG Tianhao, JIN Xiao, et al. Experimental Research on Dissolution Characteristics of R474A and R479A in Lubrication Oils[J/OL]. Moren journal, 2025.
DOI：

LIU Jianchen, WANG Tianhao, JIN Xiao, et al. Experimental Research on Dissolution Characteristics of R474A and R479A in Lubrication Oils[J/OL]. Moren journal, 2025. DOI：

摘要

新型车用空调制冷剂R474A与R479A在环保性、安全性、热力学性能等方面表现突出，但其与冷冻机油的溶解度特性尚未见相关研究。本文探究了R474A和R479A与冷冻机油RB68和RB100EV的溶解特性。在-20℃~20℃温度范围内，测试了R474A和R479A与RB68和RB100EV的临界互溶温度。在实验温度范围内，R474A与RB68和RB100EV溶液在不同含油率下始终互溶，临界互溶温度低于-20℃。R479A与两种冷冻机油均保持均相透明状态，临界互溶温度都在-20℃以下。表明两种车用制冷剂与冷冻机油在低温环境下仍有很好的互溶性，验证了作为严寒地区车用空调替代工质的适用性。基于等体积饱和法，在-20℃~60℃温度范围内测试了R474A与R479A在RB68、RB100EV中的溶解度，实验结果表明，两种新型制冷剂在RB68、RB100EV两款冷冻机油中的溶解度随着压力的升高而增大，随着温度的升高而减小。在-20℃~50℃范围内，随着压力的升高，压力对溶解度的增强效应显著提升。

Abstract

The novel refrigerants R474A and R479A demonstrate superior performance in environmental friendliness

safety

thermodynamic properties. However

research on their solubility characteristics with refrigeration oils remains unexplored. This study investigates the miscibility and solubility of R474A and R479A with lubrication oils RB68 and RB100EV. The critical miscibility temperatures of R474A and R479A with RB68 and RB100EV were tested within a temperature range of -20°C to 20°C. The findings reveal that within the experimental temperature range

R474A is miscible with RB68 and RB100EV solutions at different oil contents

and the critical miscibility temperature is lower than -20℃. R479A maintains a homogeneous transparent state with both refrigeration oils

with critical miscibility temperatures below -20°C. Based on the isochoric saturation method

the solubility of R474A and R479A in RB68 and RB100EV was tested within a temperature range of -20°C to 60°C. The experimental results demonstrate that the solubility of both novel refrigerants in RB68 and RB100EV increases with rising pressure and decreases with rising temperature. Within a certain temperature range

the enhancing effect of pressure on solubility significantly increases as pressure rises.

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