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顺式-四氟丙烯(cis-1,3,3,3-Tetrafluoropropene,R1234ze(Z))作为环境友好(温室效应潜能值GWP<1,臭氧消耗潜能值ODP=0),热力性能优异的新型工质在制冷、热泵及有机朗肯循环等领域受到越来越多的关注.本文采用两套高精度汽液相平衡装置测量了R1234ze(Z)在243.152~373.150 K内的63组饱和蒸汽压数据,本文的实验数据与Wagner方程拟合偏差均小于0.001 MPa,与REFPROP对比最大绝对偏差为0.0016 MPa,最大相对偏差为1.07%.结合文献数据采用Antoine方程、Wagner方程以及亥姆霍兹方程进行拟合,并对计算值和实验值的偏差进行分析,发现亥姆霍兹方程中起主导作用的是第2项,并由此建立对比温度和对比压力的近似线性关系,采用Wagner方程和最优项数为5项的亥姆霍兹方程拟合的平均绝对相对偏差分别为0.3105%和0.2813%,后者较前者拟合精度提高11.4%.
Cis-1,3,3,3-Tetrafluoropropene (R1234ze (Z)) is an environmentally friendly (GWP <1, ozone depletion potential ODP = 0) The working fluid is getting more and more attention in the field of refrigeration, heat pump and organic Rankine cycle, etc. In this paper, two sets of high precision vapor-liquid phase equilibrium devices are used to measure 63 groups of saturated vapor pressure of R1234ze (Z) within 243.152 ~ 373.150 K Data, the experimental data and the Wagner equation fitting deviation are less than 0.001 MPa, the maximum absolute deviation with REFPROP is 0.0016 MPa, the maximum relative deviation is 1.07% .Based on the literature data using Antoine equation, Wagner equation and the Helmholtz equation And analyzed the deviation between the calculated value and the experimental value. It is found that the Helmholtz equation plays a leading role in the second term, and an approximate linear relationship between the comparative temperature and the comparison pressure is established by using the Wagner equation and the most The average relative absolute deviations of the Helmholtz equation with excellent number of items are 0.3105% and 0.2813%, respectively. The latter is 11.4% higher than the former.