Forschungs- & Entwicklungsinformationsdienst der Gemeinschaft - CORDIS

Model of polymer efficiency and degradation

This results consists of two models: one of effective drag reduction and other of degradation. These models provide these values as function of the operating parameters. The models are used in a pipeline to compute the effect of adding Drag Reducing Agent (DRA) to the product.

The effectiveness model provides the efficiency in terms of the drag reduction that is obtained for a given DRA concentration. This allows calculating the benefit of including DRA in the pipeline by computing the optimal quantity of additive to be used.

The degradation model can be used to calculate the degradation of the additive as the product travels through the pipeline. This value is necessary in order to calculate the concentration to be injected both at the head of the line and at the intermediate injection points (if they exist).

Both models depend on the pipeline and product parameters. This is, given a pipeline (defined by pipes characteristics) and the product to be sent, it gives the percentage of improvement obtained for different DRA concentrations. The models have been obtained fitting a parametric structure to real data from several pipelines of two of the partners.

The models have already been used by CLH to be included in its simulation program provided by ESI. They allow the dispatching office to calculate the needed DRA in each situation. These results can be used as a tool by any pipeline company who want to improve its results by using DRAs.

The results obtained from the simulation softwares have confirmed that for the products tested, under the conditions specified during the field trials, the formulas that have been derived compare favourably with the results obtained from the live field tests. This validation of the formula provides a high level of confidence in the ability of the AESOP DRA formula to hydraulically describe the characteristics of the supplied DRA within the AESOP tested pipelines.

This verification should allow potential users to be confident in the results generated by the off-line tool in terms of hydraulic modelling encompassing the AESOP DRA formulas, for use on their individual pipeline design. Users will be able to experiment with different DRA injection rates in order to establish what benefits can be achieved in terms of reduction in pumping power / energy savings or increased product throughput.

The key innovative feature confirmed by results of the AESOP project is the fact that the formula generated and validated are not only empirical, they are actually tried and tested against live field conditions. This should enable a high degree of certainty for users such that the results produced will provide an accurate representation of field pipeline conditions.

The results generated during the validation of the AESOP formula can be used as a comparison benchmark against future product testing. As part of the AESOP field trials two products were field-tested. From these two products, the variables required to be input into the AESOP DRA formula were determined so as to ensure as close a correlation as possible between simulation and field results.

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Aociacion para la investigacion y cooperacion industrial de andalucia (AICIA)
Camino de los descubrimientos s/n
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