Flexible dynamic model of PHEX for transient simulations in Matlab/Simulink using finite control volume method

Salazar-Herran, Erik; Martín-Escudero, Koldobika; Portillo-Valdes, Luis A. del; Flores-Abascal, Iván; Romero-Antón, Naiara

doi:10.1016/j.ijrefrig.2019.11.003

Cited by 9 publications

(2 citation statements)

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“…Using this form it is possible to obtain the refrigerant mass flow rate at the boundary of each cell [8,10]; which eventually leads to a more compact formulation, since the intermediate mass flow rates cancel out, [7,9,11].…”

Section: Ati-2023mentioning

confidence: 99%

“…On the other hand, the FV formulation has been proved to be more flexible and robust: indeed, it has been succesfully employed to simulate for large transients of an air-cooling evaporator during compressor startup and shutdown, in order to evaluate the effect of the expansion valve opening or closing in this scenario [7]. Recently, the FV formulation was adopted for the simulation of a reversible heat pump during working mode switch, and was successful in dealing with the inversion of the working fluids' arrangement [8].…”

Section: Introductionmentioning

confidence: 99%

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Numerical verification of the condenser finite volume model

Giovannini,

Lorenzini

2023

J. Phys.: Conf. Ser.

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Numerical modelling of vapour compression systems is very useful for performance optimization through the implementation of suitable model-based control applications; in this context the heat exchangers are the most challenging component to devise, due to phase transition and ensuing discontinuities of the physical properties, and one tool which has proven itself suitable for the task is the finite volume method. A numerical verification of a finite volume model of a brazed plate condenser in counterflow arrangement is carried out, employing a fixed timestep solver; some useful guidelines are suggested to properly choose the solver order, the integration step size and the number of grid elements, balancing the accuracy of the predictions with computational time and model stability and flexibility during the transients, with the ultimate goal to provide a model suited for real-time simulations and control-oriented applications.

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