The results showed spurious fluctuations in pressure when simulating the pulsating flow; thus the dynamic behavior in the mixture two-phase flow model is insufficient to model the discontinuous liquid injection principle. Despite; the fluctuations and imperfections of the model we found that the cycle time should be kept as low as possible and that the optional secondary flow increases performance. Moreover; the paper reports on the applicability of Modelica developed models to analyze and optimize the working principle and design of expansion devices such that Modelica may be used in future development of novel discontinuous expansion devices.
Keywords: refrigeration; air-conditioning; evaporator; two-phase flow; liquid injection; pulsation; transient; dynamic; modeling; simulation; Modelica
Proceedings of the 9th International MODELICA Conference; September 3-5; 2012; Munich; Germany
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