Development and validation of a finite element model for water – CO2 coaxial gas-coolers
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Scholar |
Altres documents de l'autoria: Sánchez García-Vacas, Daniel; Cabello López, Ramón; Llopis, Rodrigo; Torrella Alcaraz, Enrique
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7035
comunitat-uji-handle3:10234/8617
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http://dx.doi.org/10.1016/j.apenergy.2011.12.100 |
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Títol
Development and validation of a finite element model for water – CO2 coaxial gas-coolersAutoria
Data de publicació
2012-05Editor
ElsevierTipus de document
info:eu-repo/semantics/articleParaules clau / Matèries
Resum
The gas-cooler heat exchanger is a characteristic device of the refrigeration plants that use CO2 as the
working fluid in transcritical conditions. The proper gas-cooler sizing, allows getting the maximum effective ... [+]
The gas-cooler heat exchanger is a characteristic device of the refrigeration plants that use CO2 as the
working fluid in transcritical conditions. The proper gas-cooler sizing, allows getting the maximum effectiveness
in the heat exchange, thus permitting to reduce the temperature approach and improving the
heat recovered in the coolant (secondary) fluid and the COP of this kind of systems.
This work deals with the development of a steady-state coaxial gas-cooler model that uses water as
coolant fluid. The model is based on the finite-volume methodology and is validated with experimental
data. An uncertainty lower than ±10% was obtained in the calculation of the heat transfer rates and an
uncertainty lower than ±3 C in the outlet temperatures of both fluids. Several correlations for estimating
the CO2 heat convection coefficient have been studied to select the one that best fits the model. Using the
model, the influence of different parameters on the gas-cooler thermal effectiveness has been analyzed
and presented in this work. Finally, a comparison between the traditional e-NTU method and the developed
model has been done. [-]
Publicat a
Applied Energy, v. 93 (May 2012)Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/restrictedAccess
info:eu-repo/semantics/restrictedAccess
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