Hysys培训模拟基础.ppt

热力学方法 PR：〉-271C，〈1000Bar SRK -143C, 359Bar 半经验模型： CS （Chao – Seader) -18C – 260, 100Bar GS ( Grayson - Streed) -18C – 425, 200Bar GS是在CS的基础上发展起来的尤其适合高含氢系统。采用Lee-Kesler方法计算系统的焓值。GS可用于高氢的加氢系统（CH4的含量30% mol） PRSV：可处理弱极性体系，可对油品含H2O, CH3OH,甘醇等体系进行严格3相闪蒸计算 Twu-Sim-Tassone (TST):也是立方型状态方程。可用于处理原油系统或高度非理想系统 Kabadi Danner：是SRK方程的修正改进型。在烃-水系统的3相平衡方面有很大改善，尤其是在稀溶液方面。 Sour- PR/Sour SRK：考虑了碱（NaOH），羧基酸存在的体系，能够计算OH-、H+、HS-的离子浓度对CO2、H2S、和NH3溶液溶解度的影响。将状态方程和Wilson API-酸性模型结合起来，处理酸水系统 Lee-Kesler Plocker：This model is the most accurate general method for nonpolar substances and mixtures. MBWR： This is a modified version of the original Benedict/Webb/Rubin equation. This 32-term equation of state model is applicable for only a specific set of components and operating conditions. Peng-Robinson： This model is ideal for VLE calculations as well as calculating liquid densities for hydrocarbon systems. Several enhancements to the original PR model were made to extend its range of applicability and to improve its predictions for some non-ideal systems. However, in situations where highly non-ideal systems are encountered, the use of Activity Models is recommended. PR-Twu： This model is based on Peng-Robinson and incorporates the Twu EoS Alpha function for improved vapor pressure prediction of all Aspen HYSYS library components. PRSV： This is a two-fold modification of the PR equation of state that extends the application of the original PR method for moderately non-ideal systems. Sour PR： Combines the PR equation of state and Wilsons API-Sour Model for handling sour water systems. Sour SRK： Combines the Soave Redlich Kwong and Wilsons APISour Model. SRK： In many cases it provides comparable results to PR, but its range of application is significantly more limited. This method is not as reliable for non-ideal systems. SRK-Twu： This model is based on SRK and incorporates the Twu Twu-Sim-Tassone：This model uses a new volume function for improved liquid molar volume predictions