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| | A dynamic simulation model for the gas chromatography (GC) and its experimental process was developed by using the analytical method of process system engineering. This model consists of the mass balance equations and the phase equilibrium equations. The components in the GC column are regarded as a whole system, and the nonideal properties of the components are taken into account in the phase equilibrium equations. With this model and the simulator, the concentrati... | | 用系统工程的分析方法建立了气相色谱仪及气 液色谱过程的动态仿真模型。模型包括物料平衡方程和相平衡方程。该模型将色谱柱中的各组分看作一个整体系统 ,并在相平衡方程式中考虑了各组分的非理想性。基于仿真平台 ,用该模型可进行稳态和非稳态条件下各组分浓度沿GC柱随时间的变化 ,并据此作出谱图。用上述模型模拟了正丙醇、正丁醇和正戊醇等正构醇的GC分离 ,研究了进样量、载气流速和色谱柱塔板数对仿真谱图的影响。而且 ,还对色谱过程中的异常情况如载气没有平稳时进样、非正常连续进样等进行了仿真探讨。仿真程序用C ++语言编写 ,在Windows 98环境下用WatcomC ++环境进行调试。运行环境为Windows 98或Windows 98下的局部网络环境。 | | 文摘来源 | | Based on the Debye state equation and the phase equilibrium equations of helium-3,a computer program for calculating the thermodynamic properties of helium-3 has been developed.Based on a series of calculations,the p-h and T-s graphs of helium-3 have been plotted in the range of temperature from 0.2 K to 300 K and pressure from 0.000 1MPa to 30 MPa.Compared with the p-h and T-s graphs(0.2 K to 20 K) plotted based on the experimental data before,the new graphs are based on the thermodynamic... | | 基于最新的德拜模型氦-3状态方程、氦-3饱和曲线特征方程和熔化曲线特征方程编写了氦-3热物性计算程序。在大量热物性的计算数据的基础上绘制了氦-3在0.2 K~300 K,0.000 1MPa~30 MPa范围内的p-h图和T-s图。与先前基于实验数据绘制的0.2 K~20 K温区氦-3的p-h图和T-s图相比,该图的绘制是建立在热力学理论计算的基础之上,适用温区得到了拓展,随机误差一般在2%以内。 | | 文摘来源 | | Based on the Clausius-Clapeyron equation, the Virial equation and the newest phase equilibrium equations of helium-3,two important properties on the phase equilibrium curves,that is,the vaporization heat and the melting heat have been calculated.The temperature ranges are 0 K~3.315 7 K for vaporization heat and 0 K~35 K for melting heat.The accuracy of these results can satisfy the application requirements. | | 基于C lausius-C lapeyron方程、维里方程和最新开发的氦-3相平衡曲线方程计算了氦-3在平衡曲线上的两个重要性质:汽化热(0 K~3.315 7 K)和熔解热(0.001 K~35 K)。计算结果覆盖的温度范围广,精度也满足工程应用的需求。 | | 文摘来源 | |   | | << 更多相关文摘 |
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