异丁烷(R600a)饱和蒸气压的实验研究  

Experimental Study on Vapor Pressure of Isobutane(R600a)

作　　者：王忠伟[1] 段远源[1] 孙晓阳[1] 

机构地区：[1]清华大学热能工程系热能动力工程及热科学重点实验室,北京100084

出　　处：《制冷学报》2005年第2期24-28,共5页Journal of Refrigeration

基　　金：国家自然科学基金项目(50225622)

摘　　要：利用改进的Burnett法PvTx实验台,精确测量了66组R600a饱和蒸气压实验数据。温度测量范围为253-393K,压力测量范围为73-2833kPa;温度测量偏差不大于±10mK,压力测量偏差不大于±870Pa。提出了一个新的R600a饱和蒸气压方程,方程适用温度范围为120K到临界温度,与已有实验数据进行了比较,还计算得到了R600a的正常沸点和偏心因子值。The vapor pressure of isobutane (R600a) was measured using a modified Burnett PvTx apparatus at temperatures from 253 to 393 K and pressures from 73 to 2833 kPa. The measurement uncertainties were estimated to be within for temperature and within for pressure. A new vapor pressure equation was developed to represent the experimental data of R600a. The present equation was also compared with available literature data. The normal boiling point and acentric factor of R600a were also determined.

关 键 词：饱和蒸气压 实验研究 异丁烷 R600A 实验数据 测量范围 测量偏差 蒸气压方程 PVTX 精确测量 临界温度 温度范围 偏心因子 正常沸点 实验台 压力 

分 类 号：O623.11[理学—有机化学] TQ013.1[理学—化学]