LNG接收站天然气盈亏计算及影响因素分析

发布时间：2018-04-21 21:08

本文选题：LNG接收站 + 误差传递　；参考：《天然气技术与经济》2017年01期

【摘要】：天然气盘盈盘亏对于整个LNG接收站经济效益及高效稳定运行至关重要。研究盘盈盘亏过程中各工艺区可能造成的天然气计量误差可以为站内的经济高效稳定运行提供针对性建议。根据LNG接收站天然气盈亏计算方法,采用误差传递公式分析各环节相关因素计量误差对LNG接收站盘盈盘亏的影响,不仅可以得到各工艺区计量误差,还能得到工艺区各计量影响因素产生误差,有助于整体误差量化比较。以国内某LNG接收站的实际运行数据为例分析得到,管存量及液态天然气计量误差较小,储罐区计量误差主要是由于气相空间质量未计算造成的,建议考虑气相空间气量。对接收站盘盈盘亏影响较大的是气态销售区及卸船区,其中占主要地位的影响因素为超声波流量计和色谱仪,LNG接收站可对这两种测量仪器进行重点保养及检测,尽量减少人为误差,以保证站内盘盈盘亏的准确性。
[Abstract]:The profit and loss of natural gas is very important to the economic benefit and efficient and stable operation of the whole LNG receiving station. The study of the natural gas metering error caused by each process area in the process of profit and loss can provide some suggestions for the economic, efficient and stable operation of the station. According to the method of calculating the profit and loss of natural gas at LNG receiving station, the error transfer formula is used to analyze the effect of the metering error of each link on the profit and loss of LNG receiving station, not only can the measurement error of each process area be obtained. The error of each measuring factor in the process area can be obtained, which is helpful to the quantification comparison of the whole error. Taking the actual operation data of a LNG receiving station in China as an example, it is found that the metering error of pipe stock and liquid natural gas is relatively small, and the measurement error in the tank area is mainly caused by the non-calculation of the gas phase spatial mass. It is suggested to consider the gas phase space gas volume. The main factors affecting the profit and loss of the receiving station are the gas sale area and the unloading area. The main influencing factors are the ultrasonic Flowmeter and the chromatograph LNG receiving station, which can carry out the key maintenance and detection of these two kinds of measuring instruments. As far as possible to reduce human error, in order to ensure the accuracy of profit and loss inside the station.
【作者单位】：中国石油大学(华东)储运与建筑工程学院/山东省油气储运安全省级重点实验室/青岛市环海油气储运技术重点实验室;
【基金】：国家自然基金(51504278) 山东省优秀中青年科学家科研奖励基金(BS2014ZZ009) 青岛市应用基础研究计划项目(14-2-4-81-jch)
【分类号】：F426.22;F406.7

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