Numerical modeling of the thermal–hydraulic behavior of wire-on-tube condensers operating with HFC-134a using homogeneous equilibrium model: evaluation of some void fraction correlations

Guzella, Matheus dos Santos; Cabezas‐Gómez, Luben; Silva, José Antônio da; Maia, Cristiana Brasil; Hanriot, Sérgio de Morais

doi:10.1007/s00231-015-1543-1

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“…The numerical code was implemented in EES ® platform [14]. Detailed information of numerical code and the implementation of the algorithm can be seen in [15].…”

Section: Mathematical Modelmentioning

confidence: 99%

Evaluation of Correlations for Natural Convection on the Behavior of a Wire-on-Tube Condenser

Silva¹,

Guzella

Maia

et al. 2014

AMR

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This paper outlines the evaluation of the influence of different empirical correlations to compute air-side heat transfer coefficient on the behavior of a wire-on-tube condenser by performing numerical simulations. A fully predictive simulation model based on first-principles equations and empirical correlations for heat transfer and friction factor is considered. Two-phase flow is modeled using homogeneous model and a void fraction correlation available in the literature is considered. Results show that for the correlations tested, different estimations of heat rate rejected to the environment can be obtained and hence, different thermal hydraulic behavior of the condenser can be obtained. This influence is critical, especially when the global numerical simulation of a domestic refrigerator is considered.

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“…The numerical code was implemented in EES ® platform [14]. Detailed information of numerical code and the implementation of the algorithm can be seen in [15].…”

Section: Mathematical Modelmentioning

confidence: 99%