2024-03-29T07:33:09Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1822632024-03-26T08:28:50Zcom_10234_2507com_10234_9com_10234_176601col_10234_6973col_10234_176618
Repositori UJI
author
Ferrer Castán, Salvador
author
Mezquita, Ana
author
Aguilella, Vicente
author
Monfort, Eliseo
2019-04-09T11:38:12Z
2019-04-09T11:38:12Z
2019-03
FERRER, S., et al. Beyond the energy balance: Exergy analysis of an industrial roller kiln firing porcelain tiles. Applied Thermal Engineering, 2019, vol. 150, p. 1002-1015
1359-43111873-5606
http://hdl.handle.net/10234/182263
https://doi.org/10.1016/j.applthermaleng.2019.01.052
The ceramic tile manufacturing process consumes large amounts of energy, mainly in the firing stage. Firing usually takes place in natural gas-fuelled continuous roller kilns, the most widely used tile firing facilities worldwide, which typically exhibit low energy efficiency (generally 5 to 20%). This paper investigates the application of energy and exergy balances to an industrial roller kiln firing porcelain tiles in order to identify the most critical parameters affecting kiln energy efficiency and propose ways of improving kiln energy performance. The experimental kiln measurements and thermodynamic calculations confirmed the kiln’s low energy performance (15%). Exergy analysis showed that 83% of the total exergy input into the kiln was destroyed, only 10% of the exergy input being kept in the physico-chemical transformations of the ceramic tile composition. The main sources of irreversibilities: natural gas combustion, heat transfer in the fired tile cooling process, and heat transfer through the kiln surfaces, were identified and quantified. The study shows that waste heat (over 61%) recovery could be expected to significantly increase kiln energy performance. Finally, further measures are proposed for optimising kiln energy efficiency.
eng
© Elsevier Ltd. All rights reserved.
energy balance
exergy analysis
efficiency
irreversibility
ceramic roller kiln
firing
Beyond the energy balance: Exergy analysis of an industrial roller kiln firing porcelain tiles
info:eu-repo/semantics/article
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