Aspen process issues

After initialization, this ‘99’ stream stock can once again become a normal hot stream stock. Is this a bug in Aspen?

In the Aspen Plus software, the error message indicates a problem with the category assignment of a stream. Specifically, stream number 99 was assigned to the “CONVEN” (regular stream) category in previous runs, while an attempt is being made to reassign it to the “HEAT” (hot stream) category in the current editing run. In Aspen, once the category of a stream is defined during a particular run, it cannot be changed in subsequent edits or runs. The steps to resolve this issue are as follows: 1. Check the current configuration of stream number 99 to confirm whether it is indeed marked as requiring a category change. 2. If it is necessary to retain the changes, the simplest way is to delete the existing stream number 99 and create a new stream with a different number, assigning it to the “HEAT” category. 3. Ensure that the configurations of all operation units associated with stream number 99 (such as reactors, heat exchangers, etc.) are updated so as to be connected to the correct new stream number. 4. Run the simulation again and check for any other errors. Adding a reactor and adjusting the heat flow usually affects the temperature, pressure, and flow rate of the system, as the reactor may generate or absorb heat, thereby altering the thermal properties of the material flow. It is essential to ensure that all input data (such as feed conditions, material properties, and reaction conditions) are accurate, in order to guarantee the correctness and stability of the model. .

I suspect it’s not a problem with adding heat flow values; rather, there’s an issue with the calculation of your reaction itself. Check the reactor’s settings and the results of its operation to find the cause from that perspective