化工学报 ›› 2019, Vol. 70 ›› Issue (9): 3248-3255.doi: 10.11949/0438-1157.20190354

• 热力学 • 上一篇    下一篇

R290/R1234yf与矿物油的互溶性测试及评价方法

陈裕博(),杨昭(),翟瑞,冯彪,吕子建,赵文仲,葛滢滢   

  1. 天津大学中低温热能高效利用教育部重点实验室,天津 300072
  • 收稿日期:2019-04-04 修回日期:2019-06-24 出版日期:2019-09-05 发布日期:2019-07-03
  • 通讯作者: 杨昭 E-mail:chenyubo0626@163.com;zhaoyang@tju.edu.cn
  • 作者简介:陈裕博(1995—),男,硕士研究生,chenyubo0626@163.com
  • 基金资助:
    国家自然科学基金重点项目(51936007);国家自然科学基金项目(51741607)

Miscibility measurement and evaluation method of R290/R1234yfwith mineral oil

Yubo CHEN(),Zhao YANG(),Rui ZHAI,Biao FENG,Zijian LYU,Wenzhong ZHAO,Yingying GE   

  1. Key Laboratory of Medium-Low Temperature Energy Efficient Utilization of Ministry of Education,Tianjin University,Tianjin 300072,China
  • Received:2019-04-04 Revised:2019-06-24 Online:2019-09-05 Published:2019-07-03
  • Contact: Zhao YANG E-mail:chenyubo0626@163.com;zhaoyang@tju.edu.cn

摘要:

制冷剂与冷冻机油的互溶性直接影响制冷系统的使用寿命和循环性能。为了解决新型制冷剂与冷冻机油的匹配问题,搭建了一套制冷剂与冷冻机油互溶性测试系统,在温度范围223.15~303.15 K内,开展了R290/R1234yf和矿物油的互溶性实验研究。结果表明:在含油率为10%±0.5%的情况下,当R290占混合制冷剂的质量分数在25%~35%变动时,R290/R1234yf和矿物油的临界互溶温度随着R290含量的增加而下降。在测试含油率范围内,基于常见的制冷工况,当R290在溶液中的质量分数高于30%时,溶液将呈现均一透明的状态;R290在溶液中的质量分数低于20%时,溶液将出现絮状物或分层现象。通过元素贡献评价方法,提供了理论临界互溶温度预测方程,并将结果以三元图的方式呈现,对新型环保制冷剂的发展具有现实指导意义。

关键词: R290/R1234yf, 矿物油, 混合物, 互溶性, 溶解, 实验验证, 临界互溶温度

Abstract:

The miscibility of refrigerant and lubricating oil directly affects the service life and cycle performance of refrigeration system. To solve the problem of matching new refrigerant and lubricating oil, a refrigerant and lubricating oil compatibility test system was established. The experimental study on the miscibility of R290/R1234yf and mineral oil was carried out in the temperature range of 223.15—303.15 K. The results show when R290 mass fraction in mixed refrigerant R290/R1234yf changed from 25% to 35% and oil proportion was specified at 10%±0.5%, the critical miscibility temperature of R290/R1234yf and mineral oil decreased with increasing R290. In the test range of oil proportion, based on the common refrigeration conditions, when the mass fraction of R290 in solution changed between 20% and 30%, the critical miscibility temperature was sensitive to the change of components. When the R290 mass fraction in solution was over 30%, the refrigerant/oil solution was believed to be clear and transparent. When the R290 mass fraction in solution was below 20%, the obvious stratification or large flocs would appear. By means of the element contribution evaluation method, the theoretical critical miscibility temperature prediction equation was provided and given in the form of ternary diagram, which has practical guiding significance for the development of new environmental protection refrigerants.

Key words: R290/R1234yf, mineral oil, mixtures, miscibility, dissolution, experimental validation, critical miscibility temperature

中图分类号: 

  • TB 61+2

图1

互溶性测试系统"

表1

制冷剂与冷冻机油参数"

Refrigerants and oil Chemical identifier Half structural formula Mass fraction purity/% Boiling point/℃ Saturated liquid density (15℃)/(kg·m-3) Viscosity(40℃)/(mm2·s-1) Global warming potential (GWP)
R1234yf 2,3,3,3-tetra-fluoropropene CH2=CFCF3 ≥99.9 -29.8 1127.2 0.125 <1
R290 propane CH3CH2CH3 ≥99.96 -42.2 507.5 0.177 3.3
mineral oil SUNISO 3GS 909.0 29.5

图2

不同温度下R290/R1234yf矿物油溶液的状态变化"

表2

R290/R1234yf与矿物油互溶性测试结果"

R290 mass fraction in R290/R1234yf refrigerant/% Oil rate/% Critical miscibility temperature/K
24.68 9.75 305.15
25.37 9.67 294.15
25.96 9.60 285.65
26.73 9.85 276.65
27.03 10.27 273.15
28.41 10.07 259.65
29.28 9.51 250.65
30.90 10.13 243.15
33.28 9.81 233.15
34.95 10.25 226.65

图3

R290/R1234yf与矿物油的临界互溶温度曲线"

表 3

变含油率下R290/R1234yf与矿物油互溶性测试结果"

w 1 w 2 w 3 Z T CMT/K T Cal/K ((T CMT-T Cal)/T CMT)/%
0.0975 0.2227 0.6798 0.6457 301.15 299.14 0.67
0.0985 0.2250 0.6765 0.6431 296.15 296.62 -0.16
0.0967 0.2292 0.6741 0.6391 294.15 291.08 1.04
0.1472 0.2532 0.5996 0.5984 286.65 272.43 4.96
0.0960 0.2346 0.6693 0.6336 285.65 284.69 0.34
0.1020 0.2329 0.6651 0.6338 285.15 288.10 -1.04
0.1059 0.2417 0.6524 0.6234 274.15 279.26 -1.87
0.1495 0.2571 0.5934 0.5934 273.15 268.74 1.62
0.0951 0.2419 0.6630 0.6262 272.65 276.56 -1.44
0.1400 0.2669 0.5931 0.5858 270.15 259.15 4.07
0.1688 0.2484 0.5828 0.5966 269.15 277.77 -3.20
0.2073 0.2674 0.5252 0.5607 264.65 258.27 2.41
0.1107 0.2527 0.6367 0.6104 262.65 268.99 -2.42
0.1535 0.2641 0.5824 0.5843 261.65 262.39 -0.28
0.1386 0.2740 0.5873 0.5786 256.15 252.89 1.27
0.1581 0.2720 0.5698 0.5740 252.65 255.51 -1.13
0.2199 0.2739 0.5062 0.5481 251.15 251.83 -0.27
0.2042 0.2784 0.5174 0.5492 250.15 249.16 0.39
0.1638 0.2818 0.5543 0.5610 248.15 247.47 0.27
0.1830 0.2693 0.5477 0.5679 247.15 257.75 -4.29
0.1922 0.2864 0.5215 0.5449 247.15 243.45 1.50
0.1192 0.2721 0.6087 0.5871 246.15 252.55 -2.60
0.2174 0.2822 0.5004 0.5393 244.65 245.24 -0.24
0.2023 0.2852 0.5125 0.5421 242.65 243.85 -0.49
0.1895 0.2963 0.5142 0.5347 239.65 236.13 1.47
0.1707 0.2937 0.5356 0.5452 239.15 238.37 0.33
0.1346 0.2952 0.5702 0.5573 237.65 236.01 0.69
0.1997 0.2943 0.5060 0.5328 235.15 237.16 -0.85
0.1863 0.3081 0.5056 0.5228 233.15 228.01 2.21
0.2122 0.2994 0.4884 0.5214 231.15 232.74 -0.69
0.1988 0.2926 0.5086 0.5351 230.65 238.46 -3.38
0.1783 0.3066 0.5152 0.5278 230.65 229.17 0.64
0.1984 0.2989 0.5026 0.5280 230.15 233.86 -1.61
0.1840 0.3166 0.4994 0.5142 227.15 222.52 2.04
0.1971 0.3035 0.4993 0.5233 225.15 230.70 -2.46
0.2095 0.3083 0.4822 0.5124 224.65 226.84 -0.98

图4

R290/R1234yf元素贡献参数与临界互溶温度关系曲线"

图5

R290/R1234yf矿物油溶液的临界互溶温度与理论计算值的偏差"

图6

R290/R1234yf与矿物油的互溶性评价结果"

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