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Título
An alkali metal thermoelectric converter hybridized with a Brayton heat engine: Parametric design strategies and energetic optimization
Autor(es)
Materia
Alkali metal thermoelectric converter
Brayton heat engine
Hybridization
Parametric strategy
Multiobjective optimization
Clasificación UNESCO
2213 Termodinámica
Fecha de publicación
2020-03
Editor
Elsevier
Citación
Wanli, P., Gonzalez-Ayala, J., Guo, J., Jincan, C.,
Calvo Hernández, A. (2020). An alkali metal thermoelectric converter hybridized with a Brayton heat
engine: Parametric design strategies and energetic optimization, Journal of Cleaner Production. https://doi.org/10.1016/j.jclepro.2020.120953
Resumen
[EN]A model for a novel integrating system consisting of an alkali metal thermoelectric
converter and a non-recuperative irreversible Brayton heat engine is presented. The efficiency
and power output density of the overall system is analyzed at light of the main characteristic
losses in each subsystem: the thickness of the electrolyte, the current density of the converter,
and the internal losses of the Brayton cycle coming from the compressor and turbine. A
detailed study on the behavior of the overall maximum power and maximum efficiency
regimes is also presented. An analysis on compromise performance regimes from
multi-objective and multi-parametric optimization techniques based on the Pareto front, for
both the subsystems and the overall system, enhance the obtained results. The numerical
results of the present model are compared with those of alkali metal thermoelectric converter
working alone and with other different existing hybrid models. It is found that the exhaust heat
discharged by the converter can be efficiently utilized by an irreversible Brayton heat engine.
So, the maximum efficiency and maximum power output density of the present model attain
41.7% and W/m2 which increase about 44.8% and 158% compared to the values of
the alkali metal thermoelectric converter working alone and 20.5% and 80.4% when compared
with a hybridized configuration including a thermoelectric energy converter.
URI
ISSN
0959-6526
DOI
10.1016/j.jclepro.2020.120953
Versión del editor
Colecciones
- GIOETFE. Artículos [53]