Abstract
Transient loading of propane caverns was analyzed by a single-phase vapor model on the assumptions that the feed is sprayed into the vapor volume and in thermodynamic equilibrium, and by a two-phase model on the assumptions that the liquid is fed at the bottom of the liquid phase in the cavern, and that the liquid and the vapor phases in the cavern are both perfectly mixed and in equilibrium. The models were used to simulate the possible consequences of malfunctioning control equipment during loading, to devise a simple feedforward control strategy, to estimate the most likely parameters for the heat material balances from real plant measurements, and to examine the possibilities for improving metering accuracy during loading and unloading of the cavern.
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