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This post was last edited by denglv56 on 2023-12-16 at 18:48. Dear experts, I have an issue with alarm messages appearing during hydraulic simulations using ASPEN. What could be the cause of these alarms, and how can they be resolved? Thank you! !
During the hydraulic simulation calculations in ASPEN, alarm messages may occur for the following reasons: 1. Incorrect parameter settings: Check your input parameters to ensure they are within the normal range. For example, check whether parameters such as operating pressure, temperature, and flow rate are reasonable. 2. Inappropriate selection of physical property models: An unsuitable choice of model can lead to inaccurate calculation results. Check the property model you have selected to ensure it is suitable for your fluid system. 3. Pipeline design issues: For example, the placement of pipe sections or valves may be unreasonable, leading to problems in the calculations. Check the design of your pipeline layout, valves, pumps, and other equipment, and make appropriate adjustments. 4. Network convergence issue: When performing computational hydrology, the network may not converge easily. Try adjusting the convergence parameters, such as the relaxation coefficient, or try using different solvers to solve this problem. To eliminate the alarm messages, you can try the following methods: 1. Carefully check the input parameters to ensure they are valid. Refer to the relevant literature or data for comparison and correction. 2. Adjust the material property model to select one that is more suitable for your computational problem and fluid system. 3. Improve pipeline design, for example, by increasing or decreasing pipe sections, and adjusting the location and parameters of equipment such as valves and pumps. 4. Modify the convergence parameters or try using other solvers to improve convergence. 5. If the above methods do not resolve the issue, you can try seeking help from ASPEN technical support or relevant forums, and ask experienced users for solutions to the problem. I hope these suggestions will help you solve the problem. Wishing you success with your calculations! .
The warning message indicates that the pressure drop is too low; this is usually caused by an excessively large tower diameter or too low gas flow rate