ASPEN PLUS design specifies a total error
Thread Content
Recently, I used ASPEN PLUS to simulate the boiler water volume. First, I completed the simulation with the normal amount of water in the boiler; the steam temperature was slightly high, at 229°C. Increasing the amount of water in the boiler slightly would meet the requirements. Then I used the design specifications to accurately calculate the amount of water in the boiler. I found that the temperature at the operating pressure of the boiler was 220°C; therefore, I set the temperature of the steam exiting the boiler to 220°C, and then designated the variable as the flow rate of water in the boiler. Following this approach, correct results can be simulated sometimes, but errors keep occurring; I don’t know why.
Could it be that the range set for the variable is too large and the step size is too small?