LNG ENERGY TRANSFER UNCERTAINTY - SENSITIVITY TO COMPOSITION AND TEMPERATURE CHANGES

Emmelyn Graham, Asaad Kenbar

Abstract

Determining and reducing the measurement uncertainty of LNG energy transfer in custody transfer operations is considered extremely important and challenging for industry. The European Metrology Research Programme (EMRP) for Liquefied Natural Gas (LNG) project has been focusing on reducing the uncertainty in the evaluation of LNG energy transfers by improving existing measurement methods, validating new measurement methods and development of new traceable calibration systems. Part of this project was to produce realistic measurement uncertainty budgets and to determine the sensitivity of the overall LNG energy transfer uncertainty to changes in the composition and temperature of different LNG cargoes. This paper provides details on development of an uncertainty budget, how correlation between uncertainty parameters was addressed, comparison with available literature and results from the sensitivity study.

Keywords

LNG, custody transfer, calibration, uncertainty budget, sensitivity

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IMEKO-TC9-2013-064.pdf

DOI

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IMEKO TC

TC9 - Flow Measurement

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