JP Journal of Heat and Mass Transfer
Volume 2, Issue 3, Pages 303 - 326
(October 2008)
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CONDENSATION OF REFRIGERATION MEDIUM UNDER EXTERNAL DISTURBANCES
Tadeusz Bohdal (Poland) and Marcin Łomiak (Poland)
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Abstract: The paper describes results of experimental investigations of condensation of the refrigeration medium R404A in the flow through a coil tube under conditions of external disturbances that occur in refrigeration units. The development and decay of condensation is induced by impulse changes of parameters of the two-phase system, such as pressure and mass flux density in the tubular channel. It is confirmed that the two-phase systems exhibit wave properties and that the disturbances propagate with finite velocities. Experiment-based correlations are elaborated to describe the propagation of disturbances during development and decay of condensation of the refrigeration medium in the tubular channel. |
Keywords and phrases: condensation, heat transfer, instabilities, wave phenomena, external disturbances. |
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