摘要
设计了一种基于流程模拟技术的物流(火用)计算方法,对化工过程物流进行准确而直接的(火用)计算,为(火用)分析和过程优化提供基础数据。该方法将总(火用)计算分解为物理(火用)、化学(火用)和混合(火用)三部分,从流程模拟软件HYSYS中提取(火用)计算所需要的热力学数据,利用自定义用户变量的方法实现(火用)计算算法。同时,建立基于(火用)效率的过程系统定量评价方法,用于改进典型煤制天然气甲烷化装置能量回收系统优化。调优后,装置的4.8MPa等级蒸汽产量增加18.4%,(火用)效率提高1.4%。
A method for calculating exergy was developed based on flowsheeting simulation technology. The accurate exergies of material stream in chemical process could be obtained directly, which were employed as the basic data for exergy analysis and process optimization. The total exergy of a material stream was divided into three terms such that the physical exergy, chemical exergy and mixed exergy, and the thermodynamic data that exergy calculation requires were derived from flowsheeting simulation software HYSYS. The ＂User Variables＂ fimction was defined to implement the exergy calculation method algorithm. Furthermore, a quantitative evaluation method based on exergy effieiency was established to modify the energy recovery system in the methanation process of coal to synthetic natural gas （SNG）. After optimization, the output of 4.8 MPa level steam was increased by 18.4 %, and exergy efficiency was improved by 1.4 %.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2012年第9期1069-1074,共6页
Computers and Applied Chemistry
基金
国家重点基础研究发展计划(973)资助项目(2012CB720500)
国家自然科学基金资助项目(20936004)
关键词
(火用)计算
流程模拟
能量优化
阈值问题
exergy calculation, fiowsheeting simulation, energy optimization, threshold problem
