Outcalt Stephanie L, Lee Byung-Chul
National Institute of Standards and Technology, Boulder, CO 80305-3328.
J Res Natl Inst Stand Technol. 2004 Dec 1;109(6):525-31. doi: 10.6028/jres.109.039. Print 2004 Nov-Dec.
An apparatus has been designed and constructed for the measurement of vapor-liquid equilibrium properties. The main components of the apparatus consist of an equilibrium cell and a vapor circulation pump. The cell and all of the system valves are housed inside a temperature controlled, insulated aluminum block. The temperature range of the apparatus is 260 K to 380 K to pressures of 6 MPa. The uncertainty of the temperature measurement is 0.03 K, and the uncertainty in the pressure measurement is 9.8 × 10(-4) MPa. An automated data acquisition system is used to measure temperature and pressure at equilibrium. The apparatus has been performance tested by measuring the vapor pressures of propane, butane, and a standard mixture of propane + butane.
已设计并制造了一种用于测量气液平衡性质的装置。该装置的主要部件包括一个平衡池和一个蒸汽循环泵。平衡池和所有系统阀门都安装在一个温度可控的隔热铝块内。该装置的温度范围为260K至380K，压力可达6MPa。温度测量的不确定度为0.03K，压力测量的不确定度为9.8×10(-4)MPa。使用自动数据采集系统在平衡状态下测量温度和压力。该装置已通过测量丙烷、丁烷以及丙烷+丁烷标准混合物的蒸汽压进行了性能测试。
