西安交通大学热流科学与工程教育部重点实验室,西安,710049
网络首发:2014-02-10,
纸质出版:2014
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张雷 1, 车立新 2, 毕胜山 1, 等. 天然气膨胀预冷混合制冷剂液化流程操作条件优化[J]. 西安交通大学学报, 2014,48(2):111-117.
Optimization of Operating Conditions of NGE-MR Natural Gas Liquefaction Process[J]. 2014, 48(2): 111-117.
张雷 1, 车立新 2, 毕胜山 1, 等. 天然气膨胀预冷混合制冷剂液化流程操作条件优化[J]. 西安交通大学学报, 2014,48(2):111-117. DOI: 10.7652/xjtuxb201402019.
Optimization of Operating Conditions of NGE-MR Natural Gas Liquefaction Process[J]. 2014, 48(2): 111-117. DOI: 10.7652/xjtuxb201402019.
为获得液化流程最优性能
确定液化流程能耗水平
探究将其应用于城市天然气调压站调峰型液化天然气装置的可行性
对天然气膨胀预冷混合制冷剂(NGE-MR)天然气液化流程的操作条件进行了优化。建立了NGE-MR液化流程模拟及优化模型
分析了混合制冷剂组成、混合制冷剂循环高压压力等主要操作条件对流程性能的影响
在此基础上以比功耗最低为优化目标
采用定压比优化方法
对NGE-MR液化流程的操作条件进行了优化。结果表明:3种压比(10、9、8)下NGE-MR天然气液化流程的最优混合制冷剂组成基本相同
各组分摩尔分数分别为2%(N
2
)、32%(CH
4
)、60%(C
2
H
6
)、6%(C
3
H
8
)
最优混合制冷剂组成与压比相关性不大; NGE-MR液化流程的最优比功耗随压比的降低而逐渐降低
但幅度很小
基本维持在0.225~0.230 kW·h/kg
较C3-MR及级联式天然气液化流程分别降低23.9%和34.4%。NGE-MR液化流程节能优势明显
适用于城市天然气调压站的调峰型LNG装置
可高效节能地生产LNG并用于城市天然气调峰。
The operating conditions of natural gas expansion pre-cooling
mixed refrigerant(NGE-MR)natural gas liquefaction process were optimized
and the optimum performance and the energy consumption level of the liquefaction process were obtained to assess the feasibility of the application of the liquefaction process in peak-shaving LNG plants in urban natural gas regulation stations. The simulation and optimization model of the NGE-MR natural gas liquefaction process which considers the specific power and uses the method of constant pressure ratio optimization was established to analyze the inf
luence of the operating conditions on the process performance. The results show that the optimum mixed refrigerant compositions are not significantly related to the pressure ratios(10
9
and 8)and the optimum mole fractions of N
2
CH
4
C
2
H
6
and C
3
H
8
are 2%
32%
60% and 6%
respectively. The optimum specific powers of the NGE-MR liquefaction process decrease slightly with the decrease in pressure ratios
in the range of 0.225-0.230 kW·h/kg. The NGE-MR liquefaction process with great superiority in energy saving is a promising technology selection for peak shaving LNG plants in urban natural gas regulator stations.
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赵敏, 厉彦忠. 丙烷预冷混合制冷剂液化流程中原料气与制冷剂匹配研究[J]. 西安交通大学学报, 2010, 44(2): 108-112.
ZHAO Min, LI Yanzhong. Analysis for selecting mixed refrigerant composition based on raw natural gas in propane pre-cooled mixed refrigerant liquefaction process[J]. Journal of Xi'an Jiaotong University, 2010, 44(2): 108-112.
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