Open AccessCoriolis flowmeter for commercial accounting of crude oil
Author(s) -
M. Yu. Prakhova,
А. Н. Краснов
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1582/1/012071
Subject(s) - flow measurement , metrology , flow (mathematics) , crude oil , petroleum engineering , environmental science , accounting , software , process engineering , computer science , engineering , mechanics , mathematics , statistics , physics , business , programming language
Commercial accounting of oil and petroleum products is carried out using the so-called CQCSs or crude quality control systems. The main measurement tool in the CQCS is a flowmeter: volumetric one for the indirect dynamic method and mass flowmeter for the direct dynamic method. The operation of any oil flowmeter varies depending on conditions of its verification in flow labs and depends on a large number of mutually affecting external factors. The total additional error from their action can significantly exceed the error declared in the measuring instrument type description. Therefore, studies of the influence of both experimental factors and through mathematical models are relevant. The article simulates a change in the operation of a sensitive element of a Coriolis flowmeter - a flow tube - due to the deposition of paraffin on its inner surface, which is released under certain conditions from crude oil. The calculations performed on the model in the Aspen HYSYS software environment showed that deposits having accumulated within one year cause an error comparable with the requirements of regulatory documents for the accuracy of commercial accounting. Therefore, it is recommended to carry out additional monitoring of metrological characteristics in the verification interval in case of accounting of highly paraffinic oils.