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ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 15b
SUMMARY:Towards an optimal design of a regenerative thermal exchanger applied to hot blast in ironmaking
DESCRIPTION:Regenerative thermal exchangers are thermal devices capable of capturing & storing heat from a hot source and releasing the stored heat to a cold sink intermittently, repeating the cycles and therefore regenerating. In iron & steel industry, these exchangers are present in the form of hot blast stoves (hot air injected in blast-furnaces tuyeres) where the hot source is industrial gas combustion fumes, the cold blast constitutes the cold source and intermediate regenerator may typically be a checkerwork of refractory bricks or more recently a packed bed of refractory balls or pebbles. 
To support design and higher performance of pebble type regenerators, a numerical model of simplified combustion combined with heat transfer in a packed bed of pebbles is presented. Model results show a good order of magnitude of the bed temperature and its spatio-temporal gradient during both on-gas and on-blast cycles, in turn found to be aligned with experimental results in a laboratory scale pebble bed. The impact of the average pebble size on the heat transfer and therefore the global sizing of the regenerator is also discussed.

CLASS:PUBLIC
DTSTART:20230615T092000
DTEND:20230615T094000
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