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Content archived on 2024-04-19

Integrated Modelling of Process Heat Transfer with Combustion and Fouling -


The objective of the project is to develop an integrated approach to combustion and fouling modelling to optimise energy and environmental efficiency in the process industries.

The work will be based on the development of two combustion models and an advanced fouling model for gaseous exhausts.

The first combustion model will be a simplified or "engineering" version for more general application (developed by NEL and GU), with minimised computation achieved by correlating results of more extensive calculations. The second (developed by CNIM in collaboration with IUSTI and ITW) will provide a version for circulating fluidised bed (CFB) systems based on specific analyses of the controlling parameters. For the fouling model, NEL and GRETh will provide a version derived from the results of earlier work under EC contract JOUE-CT90-0040-, which included particulate mechanisms. The new model will be extended to incorporate time dependent features, and it will also be supplemented by a simplified method, developed by GP, to calculate the contributions from condensing species. In addition a model specific to a refinery fouling environment will be developed by CRES.

To aid these developments, several experimental projects will also be carried out to provide data for the analyses. These include, for fouling, sets of industrial measurements by NEL and CNIM in a CFB coal fired boiler and by CRES and HAR in an oil refinery using NEL type fouling probes. In addition, two laboratory experiments aimed at specif c particulate fouling model problems will be carried out by GRETh. Combustion measurements include studies of a small scale solid bumer (BU and NEL), a pilot scale liquid fumace (GU and NEL), and a full scale liquid fumace (NEI and NEL) : for each of these, fouling measurements will also be provided. Experimental analog scale-up studies for CFB will be carried out by IUSTI to investigate the effects of scale-up in terms of particle size distribution, concentration and velocity. Work to extend CFB reactor modelling will also be carried out by ITW to allow the calculation of overall perfommance. This will combine model development studies with experimental measurements of heat transfer and pollutant fommation in laboratory and semi-industrial test loops. The data will be used to extend current CFB modelling to allow practical calculation of overall performance, including the pollutant characteristics of different fuels.
The results will therefore provide models for combustion and fouling, as well as data for model development and practical design, which can be applied to a wide range of process systems. In combination these will provide the means to predict the themmal and environmental performance of the basic elements of an industrial energy system and thus help to enhance efficiency and environmental perfommance.

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National Engineering and Assessment Group Ltd
EU contribution
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Scottish Enterprise Techical Park
G15 0QR Glasgow
United Kingdom

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Participants (10)