aspen精馏模拟灵敏度分析做不出来？ 用aspen模拟最简单的苯和 甲苯 分离过程，想做一下塔板数随着回流比变化情况的灵敏度分析，设定屏如下，应该没什么问题的。 但是运行模拟之后总是提示 ERROR WHILE CHECKING INPUT SPECIFICATIONS FOR VARIED VARIABLE IN SENSITIVITY BLOCK: "S-1" THIS VARIABLE IS NOT SPECIFIED IN THE BLOCK. YOU CAN PROVIDE AN INITIAL ESTIMATE IN THE BLOCK OR VARY ANOTHER VARIABLE. VARY SENTENCE NUMBER 1 说变量没有在模块中定义，怎么回事呢？？ 真诚求助，不胜感激~~查看更多19个回答 . 1人已关注
新书Teach yourself the basics of Aspen plus中的练习？ P46页中的一个题目 Workshop 3.3a A two-feed, two-product distillation column operating at 1 atmosphere is to be simulated using the Sep2 block. The system components are methanol, water, and normal hexane. You may assume that the system thermodynamics can be represented by an ideal vapor phase and the Unifac correlation for the liquid phase. The componential flow rates of the first feed, a saturated liquid at 14.696 psi, are 50 lbmol/hr of methanol and 100 lbmol/hr of water. The second feed flow rate is 150 lbmol/hr of pure n-hexane at 120◦F and 14.696 psi. Both feeds are at 1 atmosphere and are saturated liquids. The column performance specifications are as follows: 1. One-half of the methanol fed is to be recovered in the overhead product. 2. 99% of the water fed is recovered in the overhead product. 3. 99% of the n-hexane fed is recovered in the bottom product. Set up the problem and solve. 两股进料，两股产品的 蒸馏塔 ，在一个大气压下，用Sep2模拟。系统中组分有 甲醇 、水和正已烷。你可假定该热力学系统能用ideal方程处理气相和液相用Unifac方程关联。 第一股进料: 14.696 psi的饱和液相，甲醇(methanol) 50 lbmol/hr 水(water) 100 lbmol/hr 第二股进料：120 ℉ 14.696 psi 150 lbmol/hr 的纯的正已烷 两股进料都在一个大气压，都是饱和液体。 塔设置如下： 1.50%的甲醇进塔顶OVERHEAD物流 2.99%的水进塔顶 3.99%的正已烷进塔底 建立流程求解。 ---------- 不知我理解是否正确？ 问题是：这里强调气相和液相用不同方程，具体在物性方程中如何选择？查看更多1个回答 . 5人已关注
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