基于(?)分析的空分流程对比研究  

Comparative Study of Air Separation Process Based on Exergy Analysis

作　　者：郑捷宇 厉彦忠[1] 司标[1] 张杨[1] 

机构地区：[1]西安交通大学能源与动力工程学院,西安710049

出　　处：《工程热物理学报》2015年第10期2097-2101,共5页Journal of Engineering Thermophysics

基　　金：国家科技支撑计划(No.2012BAA08B03);高等学校博士点基金(No.20130201110069)

摘　　要：以内、外压缩空分流程为对象,通过AspenPlus模拟计算获得系统总(火用)损失,(火用)效率及压力(火用)、温度(火用)、跑冷(火用)、分离(火用)占设备(火用)损失的比例,探讨两类流程的区别。研究发现:压缩、精馏及换热设备损失是空分系统(火用)损失的主要来源;内压缩流程主换热器、过冷器的传热损失比例大于外压缩流程;相对传统的外压缩流程,内压缩流程在生产液体及高压产品方面表现更优。最后探讨了一种基于空分流程产品冷(火用)与膨胀节流过程产生冷量的变化关系来进行流程比较的方法。Through Aspen Plus simulation of inner and external compression air separation processes,the total exergy loss,exergy efficiency and the percentage of exergy destructions for the specified equipments caused by pressure losses,temperature difference,separation and heat inleak were calculated,and the main differences of such two processes were discussed.The results showed that the exergy destructions of compression,distillation and heat exchange equipments make up the majority of exergy destruction of the whole air separation system;the proportion of heat exchange losses for the main heat-exchanger and subcooler of inner compression process is greater than that of external compression process;and the inner compression process is more efficient in producing liquid and high pressure products.A comparative method based on the relationship between the cold exergy of air separation products and cold energy generated during expansion and throttling processes was investigated in the last.

关 键 词：[(火用)分析 [火用]损失 空分流程 内压缩流程 流程模拟 

分 类 号：TB131[理学—物理] TB662[理学—应用物理]