基于灰色系统理论的LNG冷箱异常工况分析
Analysis on abnormal working conditions of LNG cold box based on grey system theory
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- 引用格式:
-
郭海新.基于灰色系统理论的LNG冷箱异常工况分析[J].天然气与石油,2021,39(4):36-41.doi:10.3969/j.issn.1006-5539.2021.04.007
GUO Haixin.Analysis on abnormal working conditions of LNG cold box based on grey system theory[J].Natural Gas and Oil,2021,39(4):36-41.doi:10.3969/j.issn.1006-5539.2021.04.007
- DOI:
- 10.3969/j.issn.1006-5539.2021.04.007
- 作者:
- 郭海新
GUO Haixin
- 作者单位:
- 昆仑能源湖北黄冈液化天然气有限公司, 湖北 黄冈 438000
Kunlun Energy Hubei Huanggang LNG Co., Ltd., Huanggang, Hubei, 438000, China
- 关键词:
- LNG冷箱;冷剂管线;冻堵;灰色系统理论;实效性
LNG cold-box; Refrigerant piping; Blockage due to freezing; Grey system theory; Effectiveness
- 摘要:
- 基于保证LNG产品质量,防止LNG工厂意外停产的目的,着重研究了LNG冷箱冷剂管线差压过大堵塞盘管的问题。通过现场实时温控测点数据并结合灰色系统理论进行了数字建模，并利用模型仿真模拟了系统冷剂组分配比对实时工况的匹配性，根据模拟数据及时进行冷剂组分调控。研究表明，灰色系统理论及其运算方法不仅能通过计算发现异常工况下存在的问题,一定程度上还能运用现有数据有效计算各冷剂组分配比，得出配比对于实时工况的利弊,指导和验证下一步调整,避免因分析仪等基础设施缺乏无法及时进行组分分析的问题。研究结果可为板翅式换热器的冷剂优选及生产运行调控提供借鉴。
To guarantee the LNG product quality and prevent unexpected shut-down, this study focuses on the problem of coil tube blockage caused by the large pressure differential along the LNG cold box refrigerant piping. Based on the data of real time temperature control points and the application of grey system theory, this research developed simulation model and simulated the mixing ratio of system refrigerant components that match the performance of real time condition. The simulation model could also regulate the refrigerant components ratio on real time basis using the simulated data. The research shows that the grey system theory and calculation method 1) can identify problems in actual conditions by calculation;2) with existing data, this theory and calculated method can identify the pros and cons of different refrigerant components ratio over actual real time working conditions;3) can provide guidance and verification for future adjustment, rectifying the issues on the inability to analyse the real time performance of different refrigerants mixing ratio due to a lack of analysing equipment and related infrastructure. The research findings can be used as a reference for selection of optimum refrigerant mix and production operation control of plate-fin heat exchangers.
