CAJ | 학술논문

为了降低混合制冷剂液化天然气流程功耗，采用预冷循环。其中，阶式双混合冷剂液化天然气流程得到广泛应用。通过建立阶式双混合冷剂液化流程比功耗的目标函数，分析预冷温度、混合制冷剂组成及配比与液化流程比功耗的关系得出：混合工质预冷的最佳温度为－50℃，预冷混合制冷剂由C2 H6～C5 H12组成，深冷混合制冷剂应为N2、C H4～C3 H8组成；同时，混合制冷剂最佳配比为比功耗最小所对应的各组分的含量。
위료강저혼합제랭제액화천연기류정공모，채용예랭순배。기중，계식쌍혼합랭제액화천연기류정득도엄범응용。통과건립계식쌍혼합랭제액화류정비공모적목표함수，분석예랭온도、혼합제랭제조성급배비여액화류정비공모적관계득출：혼합공질예랭적최가온도위－50℃，예랭혼합제랭제유C2 H6～C5 H12조성，심랭혼합제랭제응위N2、C H4～C3 H8조성；동시，혼합제랭제최가배비위비공모최소소대응적각조분적함량。
To reduce the power of mixed refrigerant cycle (MRC) ,the process used the pre‐cooling cycle .The cascade double mixed refrigerant cycles are widely used in pre‐cooling cycle .This paper es‐tablished the objective function of unit power consumption of the double mixed refrigerant cycle to an‐alyze the relationship among pre‐cooling temperature ,composition and proportion of MR and the unit power consumption .As the result ,the best pre‐cooling temperature was -50 ℃ .The composition of pre‐cooling mixed refrigerant is from C2 H6 to C5 H12 ,and the deep‐cooling mixed refrigerant should include N2 ,CH4 ,C2 H6 and C3 H8 .Meanwhile ,the optimum proportion of the mixed refrigerant is the content of each component corresponding to the minimum unit specific power consumption .