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首页> 外文期刊>Journal of Mechanical Science and Technology >Operational characteristics of propane-mixed refrigerant liquefaction process for application to 30 kg/h-scale LNG plant: Mixed refrigerant supply and its effect on natural gas temperature
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Operational characteristics of propane-mixed refrigerant liquefaction process for application to 30 kg/h-scale LNG plant: Mixed refrigerant supply and its effect on natural gas temperature

机译：丙烷混合制冷剂液化过程的操作特性，用于30 kg / h规模的液化天然气工厂：混合制冷剂的供应及其对天然气温度的影响

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For stable LNG production, the feasibility study of the LNG liquefaction process control logic and the operational characteristics is to be performed before its implementation in actual plant construction where natural gas is cooled down below-160A degrees C. Therefore, it is imperative to understand how the controlled variables are influenced by the manipulated variables for the best process control strategy. In this study, 30 kg/h-bench scale natural gas liquefaction process was optimized by using Propane pre-cooled mixed refrigerant (C3MR) process. Variation of the temperature in the propane refrigerant, mixed refrigerant and the natural gas was studied in response to refrigerant flow rate to assess the effect of manipulated flow rate of natural gas on the controlled variables. Furthermore, the effects of the three manipulated variables on the controlled variables were examined, with major emphasis on analyzing the effect of the natural gas flow rate on the temperature of refrigerant. Each controlled variable is not independent, but closely related to one another. However, some controlled variables displayed relatively larger sensitivities to variation of certain manipulated variables.
机译：为了稳定地生产LNG，在将天然气冷却至低于160A的实际工厂建设中实施之前，必须对LNG液化过程控制逻辑和操作特性进行可行性研究。因此，必须了解如何为了获得最佳过程控制策略，受控变量会受到受控变量的影响。在这项研究中，通过使用丙烷预冷混合制冷剂（C3MR）工艺优化了30 kg / h台式天然气液化工艺。研究了丙烷制冷剂，混合制冷剂和天然气中温度随制冷剂流量的变化，以评估天然气的受控流量对控制变量的影响。此外，检查了三个操纵变量对控制变量的影响，重点是分析天然气流量对制冷剂温度的影响。每个受控变量不是独立的，而是彼此紧密相关。但是，某些受控变量对某些受控变量的变化表现出相对较大的敏感性。

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