Investigation of solubility behavior between HFO1234yf and lubricants

doi:10.11949/0438-1157.20190553

Abstract

Abstract:

On the basis of the original solubility experimental system, a new experimental system using the visual isochoric method was developed to measure the solubility for a refrigerant and a lubricant. In new experimental system, visual experimental cell was added, thermostatic system was adjusted, and magnetic stirring system was modified. Solubilities of HFO1234yf in squalane was measured between 283.15 K and 348.15 K. The experimental data were correlated by PR equation of state with HVOS mixing rule in which the excess Gibbs free energy was represented by the NRTL equation. The absolute average deviation between experimental and calculated data was 1.22 %. Moreover, the immiscibility between HFO134yf and squalane was found from 283.15 K to 323.15 K.

Key words: solubility, equation of state, measurement, phase equilibria

摘要：

在原有的溶解度实验台位基础上，研制了一套基于可视等体积饱和法的制冷剂/润滑油溶解实验系统，增加可视窗口的实验本体、调整恒温系统以及改进搅拌系统。采用新研制的实验系统，实验研究了温度范围为283.15~348.15 K制冷剂HFO1234yf与角鲨烷的溶解吸收特性，并采用PR状态方程和HVOS混合规则及活度系数NRTL模型对实验结果进行了关联，计算值和实验值的平均相对误差为1.22 %。此外，温度范围为283.15 ~323.15 K内发现了不互溶分层的现象。

关键词: 溶解性, 状态方程, 测量, 相平衡

CLC Number:

TK 121

Yanjun SUN, Gaolei DI, Juan XIA, Xiaopo WANG, Na GONG. Investigation of solubility behavior between HFO1234yf and lubricants[J]. CIESC Journal, 2019, 70(S2): 25-30.

孙艳军, 邸高雷, 夏娟, 王晓坡, 龚娜. 不同冷冻润滑油对HFO1234yf溶解吸收特性的研究[J]. 化工学报, 2019, 70(S2): 25-30.

Figures/Tables 6

Fig.1 Diagram of solubility measurement

Table 1 Experimental data for solubility of HFO1234zyf in squalene

T/K	x ₁	p/MPa	T/K	x ₁	p/MPa
283.15	0.0211	0.023	333.15	0.0104	0.03
	0.0502	0.065		0.0298	0.083
	0.1382	0.16		0.0755	0.21
	0.2986	0.326		0.1611	0.449
293.15	0.019	0.024		0.2299	0.655
	0.048	0.068		0.3212	0.916
	0.1201	0.171		0.4745	1.352
	0.2557	0.356	343.15	0.0087	0.031
	0.3753	0.5		0.0272	0.086
303.15	0.0173	0.025		0.0697	0.219
	0.0421	0.072		0.1485	0.47
	0.1015	0.183		0.2122	0.687
	0.2202	0.383		0.2966	0.966
	0.3226	0.546		0.4354	1.445
	0.4656	0.734	353.15	0.0078	0.032
313.15	0.014	0.027		0.0261	0.087
	0.0382	0.075		0.0665	0.223
	0.0933	0.191		0.1435	0.479
	0.195	0.407		0.2046	0.702
	0.2829	0.585		0.2864	0.99
	0.3978	0.805		0.421	1.489
323.15	0.0123	0.029
	0.0333	0.079
	0.0832	0.201
	0.1757	0.429
	0.253	0.621
	0.3538	0.863
	0.5365	1.24

Fig.2 Solubility of R1234yf in squalane at 350 K with increasing pressure

Table 2 Adjustable parameter

体系	$α$	$τ 12,0$	$τ 12,1$	$τ 21,0$	$τ 21,1$
R1234yf + squalane	0.42	2.2853	0.0171	-2.7626	0.0030

Table 2 Adjustable parameter

体系	$α$	$τ 12,0$	$τ 12,1$	$τ 21,0$	$τ 21,1$
R1234yf + squalane	0.42	2.2853	0.0171	-2.7626	0.0030

Fig.3 Experimental results of solubility of HFO1234yf in squalane ◆—283.15 K；■—293.15 K；●—303.15 K；▲—313.15 K；▼—323.15 K；□—333.15 K；○—343.15 K；△—348.15 K

Fig.4 Relative deviation between experimental and calculated values of HFO1234yf in squalane ◆—283.15 K；■—293.15 K；●—303.15 K；▲—313.15 K； ▼—323.15 K；□—333.15 K；○—343.15 K；△—348.15 K

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