| 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253-393 K,压力测量范围为73-2833 kPa;温度测量偏差不大于±10 mK,压力测量偏差不大于±870 Pa.提出了一个新的R600a饱和蒸气压方程,方程适用温度范围为120 K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. |
| 关键词: 工程热物理 饱和蒸气压 稳态法 异丁烷 |
| DOI： |
| Revised:June 17, 2004 |
| 基金项目:国家自然科学基金 |
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| Experimental Study on Vapor Pressure of Isobutane(R600a) |
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| Abstract: |
| 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. |
| Key words: R600a |
