摘要
为了提高利用分输站压差制冷液化天然气工艺的液化率,该工艺增加了混合冷剂外冷,其液化流程可分为膨胀前预冷液化天然气流程和膨胀后外冷液化天然气流程。对两种工艺流程建立最大年均利润总额目标函数,并对其自由度敏感性进行分析。通过实例分析计算得出,分输站利用压差液化天然气工艺采用膨胀前预冷比膨胀后外冷经济效益更高。
In order to improve the liquefied rate of utilizing gas pressure energy of gas-distributing station to liquefy natural gas,the mixed refrigerant cycle（MRC）was increased in the process.The natural gas liquefaction processes include pre-cooling of LNG before expander and external cooling af-ter expander.The objective function of the max annual average total profit is established to analyze the effect of degrees sensitivity on the max annual average total profit of two liquefaction processes. The results of analysis and calculation indicate that MRC before the expander process can realize high-er economic benefit than MRC after the expander.
出处
《石油与天然气化工》
CAS
北大核心
2015年第2期54-59,共6页
Chemical engineering of oil & gas
关键词
分输站
混合冷剂
膨胀
经济效益
gas-distributing station, mixed refrigerant, LNG, expansion, economic benefit
