Share

IIR document

Development and validation of a micro-fin tubes evaporator model using R134a and R1234yf as working fluids.

Author(s) : MENDOZA MIRANDA J. M., RAMIREZ-MINGUELA J. J., MUÑOZ-CARPIO V. D., et al.

Type of article: Article, IJR article

Summary

This paper presents a model of shell and tube evaporator with micro-fin tubes using R1234yf and R134a. The model developed for this evaporator uses the e-NTU method to predict the evaporating pressure, the refrigerant outlet enthalpy and the outlet temperature of the secondary fluid. The model accuracy is evaluated using different two-phase flow boiling correlations for micro-fin tubes and comparing predicted and experimental data. The experimental tests were carried out for a wide range of operating conditions using R134a and R1234yf as working fluids. The predicted parameter with maximum deviations, between the predicted and experimental data, is the evaporating pressure. The correlation of Akhavan–Behabadi et al. was used to predict flow boiling heat transfer, with an error on cooling capacity prediction below 5%. Simulations, carried out with this validated model, show that the overall heat transfer coefficient of R1234yf has a maximum decrease of 10% compared with R134a.

Available documents

Format PDF

Pages: 32-43

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Development and validation of a micro-fin tubes evaporator model using R134a and R1234yf as working fluids.
  • Record ID : 30013107
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 50
  • Publication date: 2015/02

Links


See other articles in this issue (20)
See the source

Indexing