文献类型：期刊文献

中文题名：LNG混合制冷系统有效能分析

英文题名：Exergy analysis of LNG mixed refrigeration cycle system

作者：赵路[1];杨敬一[1];徐心茹[1];赵晓军[1]

机构：[1]华东理工大学化工学院,上海200237

年份：2010

卷号：27

期号：9

起止页码：1277

中文期刊名：计算机与应用化学

外文期刊名：Computers and Applied Chemistry

收录：CSTPCD;;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：天然气;混合制冷循环;压缩机;换热;有效能

外文关键词：LNG, mixed refrigeration cycle, compressors, heat exchangers, exergy

摘要：针对国内某天然气处理厂液化制冷系统的能耗及有效能进行了优化和分析,并提出了装置改进意见。该厂日处理天然气150 m^3/d,天然气液化制冷装置采用Linde混合制冷循环工艺,目前尚无针对该天然气液化制冷系统的相关文献与研究。本文用AspenPlus软件建立流程模型,进行模拟计算,并根据计算所得热力学数据,分析冷剂压缩、换热、节流阀节流降压及冷剂混合等4个过程的有效能。结果表明,它们有效能的损失分别为9 395 kW、3 887 kW、1 191 kW、627 kW,共计为15 100 kW。可见Linde液化制冷循环的有效能损失,主要发生在压缩过程和冷剂换热之中,分别占总有效能损失的62.2%、25.7%,因此这2个过程是节能降耗的重点。
The power consumption and exergy of a mixed refrigeration system based on LNG plant were analyzed and optimized, meanwhile the improvement suggestion were given. It is a 150 m3/d LNG plant with Linde mixed refrigeration cycle. There is no article about the Linde mixed refrigeration cycle currently. Aspen Plus was used to establish the model of the LNG plant to calculate the process. The calculated thermodynamics results were used to analyze the exergy loss of compressors, heat exchangers, expansion valves and fluids mixing. The results show that total exergy loss of compressors, heat exchangers, throttling valves and fluids mixing are respectively 9 395 kW, 3 887 kW, 1 191 kW, 627 kW and the total exergy loss of system is 15 100 kw. So the major exergy loss is in the processes of compressors and heat exchangers, which are respectively 62.2% and 25.7% of total exergy loss of system. It is very important to reduce energy consumption in the compressors and heat exchangers.