郑文科 1张婧煜 1关司航 1杨已颢 2姜益强 1孙澄1
作者信息
- 1. 哈尔滨工业大学建筑与设计学院,黑龙江哈尔滨 150001||寒地城乡人居环境科学与技术工业和信息化部重点实验室,黑龙江哈尔滨 150090
- 2. 上海能源建设工程设计研究有限公司,上海 200000
- 折叠
摘要
Abstract
The components of the mixed refrigerant was optimized using the D-optimal mixture design method in Design Expert software,and the single mixed refrig-erant(SMR)process flow was established via the chemical simulation software Aspen HYSYS to verify the optimization results.By analyzing the sensitive range of the refrigerant and combining its thermody-namic properties,the components in the mixed refriger-ant were selected as:N2,CH4,C2H4,C3H8,and i-C5H12.The optimal composition of the mixed refrigerant was determined using the D-optimal mixture design method in Design Expert software.When the molar fractions of N2,CH4,C2H4,C3H8,and i-C5H12 in the mixed refriger-ant are 13.5％,33％,36％,11.5％,and 6％respec-tively,the specific power consumption of the optimized natural gas liquefaction system decreases by 12.19％,and the total power consumption of the system de-creases by 34.46％.Due to the interactions among the components in the mixed refrigerant,a quadratic re-gression polynomial was used to fit the molar fractions of each component in the mixed refrigerant and the spe-cific power consumption of the natural gas liquefaction system.The study on the influence of the interaction between the components in the mixed refrigerant on the specific power consumption of the natural gas lique-faction system reveals that CH4 interacts with other components in the mixed refrigerant to varying de-grees,among which the interaction between CH4 and i-C5H12 is the strongest,having the greatest impact on the specific power consumption of the natural gas lique-faction system.When the molar fraction of CH4 is in the range of 26.0％to 34.0％,and the molar fractions of N2,C2H4,and C3H8 are 11.6％,33.3％,and 14.0％re-spectively,the specific power consumption of the natu-ral gas liquefaction system decreases significantly as the molar fraction of CH4 increases and the molar frac-tion of i-C5H12 decreases.The optimized optimal mixed refrigerant composition was imported into Aspen HYSYS software,and the equipment power consump-tion and system specific power consumption before and after optimization were obtained.The total power con-sumption of the compressor decreases by 12.12％.The total power consumption of the cooler decreases by 42.63％.Consequently,the specific power consump-tion of the natural gas liquefaction system decreases by 12.19％,and the total power consumption of the system decreases by 34.46％.Therefore,the method of optimiz-ing the composition of the mixed refrigerant using the D-optimal mixture design method in Design Expert software is feasible.This optimization approach suc-cessfully achieves the objective of energy conservation and efficiency improvement.关键词
天然气液化系统/单循环混合制冷剂液化工艺/混合制冷剂组成/混料设计Key words
natural gas liquefaction system/SMR lique-faction process/composition of mixed refrigerant/mix-ing design分类
石油、天然气工程
