Method for calculating metering error of LNG (Liquefied Natural Gas) port-arriving handover

Abstract

The invention relates to a method for calculating LNG (Liquefied Natural Gas) port-arriving handover metering errors, and belongs to the field of natural gas transportation. The method solves the problem of errors caused by metering accuracy of a metering system during LNG port-to-port handover, and adopts the specific technical scheme that firstly, factors influencing port-to-port metering results are summarized according to the metering accuracy of port-to-port handover, then calculation steps and formulas are written out according to an LNG port-to-port trade handover process, and finally, the LNG port-to-port trade handover process is calculated according to an error calculation principle. And determining a function relationship between the indirect measurement quantity and each direct measurement quantity, and analyzing by utilizing a trade handover energy calculation formula to obtain an LNG port arrival trade handover metering error formula. According to the method, the influence of multiple factors is considered, the method is more practical, the LNG port-to-port handover metering error is provided, and the efficiency is improved for calculating the port-to-port handover value, the metering error and the metering error rate of each ship.

Description

technical field [0001] The invention belongs to the field of natural gas transportation, and in particular relates to a method for calculating the measurement error of natural gas arrival at a port. Background technique [0002] The loss of natural gas in the LNG receiving station is not only an important technical indicator to measure the comprehensive management level of an enterprise, but also directly related to the production cost and economic benefit of the enterprise. However, since the LNG receiving station is in the initial stage of development in my country, there has not been much research on the loss of natural gas in the receiving station. However, in order to avoid more economic losses, it is necessary to carry out the analysis and research on the natural gas loss of the LNG receiving station to analyze the impact of the loss of the receiving station. factors, and provide guidance for the control and management of LNG terminals. When natural gas is transported ...

AI Technical Summary

Problems solved by technology

However, since the LNG receiving station is in the initial development stage in my country, there are not many studies on the natural gas loss of the receiving station. However, in order to avoid more economic losses, it is necessary to carry out analysis and research on the natural gas loss of the LNG receiving station and analyze the impact of the loss of the receiving station. factors, providing guidance for the control and management of LNG receiving stations

When natural gas is transported and operated in the receiving station, its theoretical loss is zero, that is, the intake amount plus the initial tank storage is equal to the gas output plus the final tank storage. However, due to the measurement accuracy of the metering system, the loss of the receiving station cannot be completely avoided. produce

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