Heat exchangers are important components in many engineering applications. This paper proposes a numerical two-phase heat exchanger model with simultaneous heat transfer and pressure drop calculations. The presented model provides a modeling framework compatible with numerous different correlations for both single- and two-phase flow of pure fluids and fluid mixtures. Furthermore, it considers nonconstant fluid properties as well as longitudinal heat conduction and parasitic heat loads, which is particularly relevant in mixed refrigerant cycles for cooling of low-temperature applications. The governing equations are derived and the solution strategy is presented, followed by the model validation against analytical solutions in the corresponding limits. Finally, an exemplary heat exchanger is analyzed using both homogeneous and separated flow models, and the results are compared with experimental data from literature.
Modeling of Two-Phase Heat Exchangers With Zeotropic Fluid Mixtures
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received January 18, 2017; final manuscript received December 15, 2017; published online January 30, 2018. Editor: Portonovo S. Ayyaswamy.
Gomse, D., Kochenburger, T. M., and Grohmann, S. (January 30, 2018). "Modeling of Two-Phase Heat Exchangers With Zeotropic Fluid Mixtures." ASME. J. Heat Transfer. May 2018; 140(5): 051801. https://doi.org/10.1115/1.4038852
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