Sanchez, D.; Cabello, R.; Llopis, R.; Torrella Alcaraz, E. (2012). Development and validation of a finite element model for water - CO2 coaxial gas-coolers. Applied Energy. 93:637-647. https://doi.org/10.1016/j.apenergy.2011.12.100
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/52082
Title:
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Development and validation of a finite element model for water - CO2 coaxial gas-coolers
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Author:
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Sanchez, D.
Cabello, R.
Llopis, R.
Torrella Alcaraz, Enrique
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UPV Unit:
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Universitat Politècnica de València. Departamento de Termodinámica Aplicada - Departament de Termodinàmica Aplicada
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Issued date:
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Abstract:
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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 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 ε-NTU method and the developed model has been done.
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Subjects:
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CO 2
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Finite volume model
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Gas-cooler
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Thermal effectiveness
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Transcritical cycles
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Best fit
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Coolant fluid
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Developed model
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Experimental data
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Finite element models
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Finite-volume
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Heat convection coefficient
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Heat exchange
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Heat transfer rate
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Outlet temperature
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Refrigeration plants
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Transcritical
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Transcritical cycle
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Working fluid
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Coolants
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Cooling systems
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Finite volume method
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Gases
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Heat exchangers
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Carbon dioxide
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Cooling
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Data set
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Finite element method
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Heat transfer
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Model validation
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Numerical model
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Thermal convection
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Uncertainty analysis
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ε-NTU
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Copyrigths:
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Cerrado |
Source:
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Applied Energy. (issn:
0306-2619
)
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DOI:
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10.1016/j.apenergy.2011.12.100
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Publisher:
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Elsevier
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Publisher version:
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http://dx.doi.org/10.1016/j.apenergy.2011.12.100
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Project ID:
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info:eu-repo/grantAgreement/MICINN//CTM2008-06468-C02-02/ES/INSTALACIONES FRIGORIFICAS MEDIOAMBIENTALMENTE SOSTENIBLES. ESTUDIO DE ASPECTOS ENERGETICOS RELACIONADOS CON LA APLICACION DEL REFRIGERANTE NATURAL CO2./
info:eu-repo/grantAgreement/MARM//200800050084716/ES/RNCO2: NUEVAS TECNOLOGÍAS FRIGORÍFICAS DE COMPRESIÓN DE VAPOR CON UTILIZACIÓN DEL REFRIGERANTE NATURALL CO2 EN SUSTITUCIÓN DE LOS ACTUALES HFC/
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Thanks:
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The authors are indebted to the Spanish Ministry of Education and Science (CTM2008-06468-C02-02/TECNO) and to the Spanish Ministry of the Environment and Rural and Marine Affairs (200800050084716) for the economic support ...[+]
The authors are indebted to the Spanish Ministry of Education and Science (CTM2008-06468-C02-02/TECNO) and to the Spanish Ministry of the Environment and Rural and Marine Affairs (200800050084716) for the economic support given to the present work.
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Type:
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Artículo
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