Lowering uncertainty in crude oil measurement by selecting optimized envelope color of a pipeline
2011
Lowering uncertainty in crude oil volume measurement has been widely
considered as one of main purposes in an oil export terminal. It is found
that crude oil temperature at metering station has big effects on measured
volume and may cause big uncertainty at the metering point. As crude oil
flows through an aboveground pipeline, pick up the solar radiation and heat
up. This causes the oil temperature at the metering point to rise and higher
uncertainty to be created. The amount of temperature rise is depended on
exterior surface paint color. In the Kharg Island, there is about 3 km
distance between the oil storage tanks and the metering point. The oil flows
through the pipeline due to gravity effects as storage tanks are located 60m
higher than the metering point. In this study, an analytical model has been
conducted for predicting oil temperature at the pipeline exit (the metering
point) based on climate and geographical conditions of the Kharg Island. The
temperature at the metering point has been calculated and the effects of
envelope color have been investigated. Further, the uncertainty in the
measurement system due to temperature rise has been studied.
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