What does the warning “NET CONDENSER DUTY IS NEGATIVE. INFEASIBLE SPECS” mean in the absorber simulation?
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When performing an absorber simulation based on the teacher’s lectures in ASPEN V12, what does the warning \"NET CONDENSER DUTY IS NEGATIVE. INFEASIBLE SPECS\" mean? Why is it an unfeasible specification? The teacher’s ASPEN V11 version does not have this warning; all other results are the same.
This warning “NET CONDENSER DUTY IS NEGATIVE. INFEASIBLE SPECS” means that the net condenser load is negative, i.e., the input specifications or settings are not feasible from a physical or technical standpoint. In practical operation, the condenser should release heat (a positive value); if a negative value appears, it may be due to incorrect settings or inappropriate simulation parameters. Different versions of ASPEN may have slight differences in algorithms or default settings, which might be why this warning does not appear in version V11. It is recommended to check the relevant parameter settings for the absorber in version V12, such as feed conditions, pressure inside the tower, temperature, etc., to ensure their accuracy and Reasonableness Alternatively, try adjusting these parameters to reasonable values to see if this warning still appears. .