Saturated vapor pressure, density, viscosity, specific heat capacity and specific enthalpy of R1336mzz(Z)/TEGDME working pair

doi:10.11949/0438-1157.20240595

Abstract

Abstract:

With the acceleration of research in hydrogen fuel cell industry, the utilization of waste heat (about 70℃) has become an urgent problem to be solved. However, the generation temperature of traditional LiBr/H₂O working pair is too high to utilize low-grade heat energy and has the problems of crystallization. Therefore, a new organic working pair R1336mzz(Z)/TEGDME is proposed. The saturated vapor pressure, density, viscosity and specific heat capacity were measured. The mixing enthalpy and specific enthalpy were calculated by NRTL model. The above data are regressed using the least squares method, and the square of the correlation coefficient between the experimental value and the fitting value is greater than 0.999, which is in good agreement. The fitting formula can be used to design and calculate the waste heat refrigeration thermal cycle of the new low temperature working pair. Compared with the LiBr/H₂O working pair, the generation temperature of R1336mzz(Z)/TEGDME working pair is reduced by 12℃ and the viscosity by about 30%, which has strong practical application significance.

Key words: low temperature working pair, absorption heat pump, saturated vapor pressure, thermophysical property

摘要：

随着氢燃料电池产业加速发展，其低温余热（约70℃）利用成为了亟需解决的问题，而传统的LiBr/H₂O工质对的发生温度过高，无法利用较低品位的热能以及低温下易结晶，因此提出了新型低温工质对R1336mzz（Z）/TEGDME，并进行了饱和蒸气压、密度、黏度、比热容的测量，通过NRTL模型计算了其混合焓和比焓。使用最小二乘法对以上数据均进行了回归，实验值与拟合值的相关系数的平方均大于0.999，吻合较好，可使用拟合公式进行新型低温工质对的余热制冷热力循环的设计计算。相较LiBr/H₂O工质对，低温工质对R1336mzz（Z）/TEGDME的发生温度降低了约12℃，黏度降低了约30%，可以利用低温燃料电池余热制冷，具有很强的实际应用意义。

关键词: 低温工质对, 吸收式热泵, 饱和蒸气压, 热物性

CLC Number:

TK 01⁺9

Yufan YANG, Chunhuan LUO, Jiahui ZHAO, Muran HE, lin LANG, Zexiang LI, Chunting ZHOU. Saturated vapor pressure, density, viscosity, specific heat capacity and specific enthalpy of R1336mzz(Z)/TEGDME working pair[J]. CIESC Journal, 2024, 75(12): 4432-4441.

杨宇帆, 罗春欢, 赵佳辉, 何沐然, 郎林, 李泽祥, 周春廷. 低温工质对R1336mzz（Z）/TEGDME的饱和蒸气压、密度、黏度、比热容及比焓[J]. 化工学报, 2024, 75(12): 4432-4441.

Figures/Tables 19

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试剂	纯度	生产厂家
R1336mzz(Z)	≥99%	上海锐一
TEGDME	≥99%	阿拉丁

试剂	纯度	生产厂家
R1336mzz(Z)	≥99%	上海锐一
TEGDME	≥99%	阿拉丁

w=0.55		w=0.60		w=0.65		w=0.70		w=0.75
T/K	p/kPa	T/K	p/kPa	T/K	p/kPa	T/K	p/kPa	T/K	p/kPa
294.95	19.44	295.75	18.13	295.15	15.42	295.75	14.08	295.75	12.37
302.95	28.42	303.35	26.04	303.85	23.62	303.45	20.35	304.85	18.77
312.35	43.93	313.15	38.80	313.75	35.62	312.65	30.42	314.65	29.03
323.35	68.51	322.95	57.11	323.95	52.78	322.15	44.03	325.05	42.84
333.45	98.50	333.05	83.45	334.35	77.90	333.35	67.17	333.45	60.22
343.05	134.86	342.15	113.71	344.25	107.56	343.25	93.62	344.15	86.40
		347.35	132.48	352.95	139.76	353.75	130.89	354.95	121.00
								356.65	128.3

w=0.55		w=0.60		w=0.65		w=0.70		w=0.75
T/K	p/kPa	T/K	p/kPa	T/K	p/kPa	T/K	p/kPa	T/K	p/kPa
294.95	19.44	295.75	18.13	295.15	15.42	295.75	14.08	295.75	12.37
302.95	28.42	303.35	26.04	303.85	23.62	303.45	20.35	304.85	18.77
312.35	43.93	313.15	38.80	313.75	35.62	312.65	30.42	314.65	29.03
323.35	68.51	322.95	57.11	323.95	52.78	322.15	44.03	325.05	42.84
333.45	98.50	333.05	83.45	334.35	77.90	333.35	67.17	333.45	60.22
343.05	134.86	342.15	113.71	344.25	107.56	343.25	93.62	344.15	86.40
		347.35	132.48	352.95	139.76	353.75	130.89	354.95	121.00
								356.65	128.3

i	A_i	B_i	C_i	R²
0	-3.637166	-19.79008	258.9322594	0.99999
1	52.185793	-1709.068	151.1888188
2	-119.9719	1192.7583	213.5228981
3	127.00578	-712.2842	213.9228973
4	-49.20176	6.0767626	385.3963235