混合制冷剂循环膨胀机内复叠天然气液化流程设计

提出一种混合制冷剂循环膨胀机内复叠天然气液化流程(Hybrid JT-exp)。采用自主开发的流程模拟程序,分别对C3/MRC流程、AP-XTM流程和Hybrid JT-exp流程进行了模拟,并以单位能耗为指标对三种流程进行了优化。优化结果发现,Hybrid JT-exp流程综合特性曲线匹配效果最好,其流程总功耗和单位能耗与AP-XTM流程相当;与C3/MRC流程相比,其流程总功耗降低约9.5%,单位能耗降低约9.6%。Hybrid JT-exp流程可作为AP-XTM流程的一种替代技术方案。

Mixed-refrigerant J-T cycle hybrid with expander natural gas liquefaction process design

Three liquefaction cycles for LNG(liquefied natural gas) production are compared in this paper.The first two are C3/MRC cycle and AP-XTM process,which are well known natural gas liquefaction processes developed by APCI.Another one is the novel concept of hybrid cycle,which is based on mixed-refrigerant J-T cycle hybrid with expander(Hybrid JT-exp process).This paper describes the detailed processes of Hybrid JT-exp process and the quantitative comparison results by computer process simulation program under some realistic physical constraints.It is found that the hot and cold composite curves for the Hybrid JT-exp process match best.The total power consumption and the minimum specific energy consumption of the Hybrid JT-exp process are equivalent with the AP-XTM process,compared with the C3/MRC cycle,the total power consumption is reduce by about 9.5%,the minimum specific energy consumption drop by about 9.6%.The Hybrid JT-exp process can be used as an alternative technology solution with AP-XTM process.