湍流状态下二氧化碳-水相平衡体系压力的偏移

以二氧化碳-水体系为对象，研究了流体流动和温度变化对气液相平衡体系压力的影响。常压环境中，在温度为288.15~303.15K区间内每隔5K取一个温度实验，在流速范围为1~3m/s区间内每隔0.5m/s取一个流速进行实验，使二氧化碳饱和水溶液在设计管路中流动。实验结果显示，动态平衡偏移率与液相流速成正比，与实验温度成反比。在实验条件下，动态平衡偏移率最大可达15%。对实验数据拟合后，得到动态平衡偏移率的表达式为 r=6.3142×10^－10(Re)^1.6549(μ_l/μ_g)^1.0580(适用范围为7500

Deviation of the carbon dioxide-water gas-liquid balance from thermodynamic equilibrium when in turbulence

The carbon dioxide-water system has been employed for a flowing gas-liquid equilibrium investigation. The experiment was carried out in a constant volume vessel which was connected to a horizontal circulation pipe and a peristaltic pump. The experiments were carried out at temperatures of 288.15K-303.15K with an interval of 5K, and flow velocities of 1m/s-3m/s with an interval of 0.5m/s. The temperature and pressure data were recorded by a computer system. The results showed that the ratio of the excess carbon dioxide in the gas phase to the thermodynamic equilibrium amount of carbon dioxide in the liquid (r) was proportional to the flow velocity and inversely proportional to the temperature. The correlation of r was gained by fitting experimental data as r=6.3142×10^－10(Re)^{1. 6549}(μ_l/μ_g)^1.0580(7500