混合制冷剂HFC152a/HCFC22气相音速、理想气体比热及第二音速维里系数  

Speed-of-Sound, Ideal-Gas Heat Capacity, and Second Acoustic Virial Coefficient for Mixing Refrigerant Difluoroethane (HFC152a) + Difluoromethane (HCFC22)

作　　者：何茂刚[1] 刘志刚[1] 等 

机构地区：[1]西安交通大学能源与动力工程学院，陕西西安710049

出　　处：《热科学与技术》2002年第1期87-91,共5页Journal of Thermal Science and Technology

基　　金：国家自然科学基金项目 (5 99760 3 0 ) ;陕西省科技研究发展计划项目 (2 0 0 1K0 7-G11)

摘　　要：用球共振声学法测量了新型环保节能混合制冷剂 HFC1 5 2 a/HCFC2 2的气相音速 ,共得到音速数据 84个。实验测量温度范围为 2 93～ 3 2 3 K,压力范围为 2 0 0～ 40 5 k Pa,混合制冷剂 R2 2的质量成分分别为1 3 .8Wt%和 2 5 .5 Wt%。实验温度、压力和气相音速的不确定度分别为± 1 4m K,± 2 k Pa和± 3 .7× 1 0 - 5。根据音速实验数据还精确确定了两种混合工质的成分 ,得到了该混合工质共 1 4点理想气体比热和第二音速维里系数。Eighty\|four speed\|of\|sound values in gaseous mixtures difluoroethane (CH\-3CHF\-2, HFC 152a) + difluoromethane (CHClF\-2, HCFC22) have been measured using a spherical resonator. The measurements have been carried out at temperatures from 293 K to 323 K, pressures from 200 kPa to 405 kPa, and mass fractions of HCFC22 of 13.8% and 25.5% respectively. The experimental uncertainties in the temperature, pressure and speed\|of\|sound in gaseous are estimated to be not greater than ±14 mK, ±2.0 kPa and ±3.7×10 -5 , respectively. The compositions of the binary refrigerant mixtures, HFC152a/HCFC22, have accurately been determined and fourteen ideal\|gas heat capacities and second acoustic virial coefficients have obtained from the speed\|of\|sound measurements.

关 键 词：混合制冷剂 HFC152A HCFC22 声学法 理想气体比热 第二音速维里系数 音速 球共振器 

分 类 号：TB612[一般工业技术—制冷工程]