Thermal load of different thermodynamic towers

2009-02-24View Original

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Recently, a problem was identified in simulations: when using different thermodynamic methods to calculate the vapor-liquid equilibrium data for a mixture of dimethyl carbonate and methanol at atmospheric pressure, the dew point line and the bubble point line almost overlap, and the K line also overlaps to a large extent. Logically, for a separation tower under atmospheric pressure with the same feed, the same outlet conditions, the same number of tray levels, and the same feed position, the heat loads on the top condenser and the bottom reboiler should be similar; in reality, there is a difference of 1/3. What is the reason for this?

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Thermal load of different thermodynamic towers

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