I wanted to cofirm something - please correct me if I am wrong.
Unit process use elementary flows and System process use product flows?
For example if I want to model "Production of HDPE granulate"
- In a unit process I will only consider as input the elementary flows such as "gas" , "primary energy, from windpower", "biomasse" etc. and not include "ethylene, used electricity in granulate production and process heat"??
- in the system process, I would only include as input the ethylene, electricity for production of the granulates, and process heat"? And not include any elementary flow?
Also, does it make sense to make a process with all - both elemantary flows and the other product flows as inputs?
I am quite confused how to model this. Because it is part of a bigger product - HDPE jerry can. So i am not sure what to include when I want to model the "production of HDPE granulates"
Thanks in advance, I hope it was clear.