3 replies to this topic

[Tamar]

Hello,

 

I am trying to setup my dehumidifier ventialtion process in ChemCAD, and I'm not successful in getting the results I want. 

 

I'm not exactly a student, but I am trying to learn ChemCAD. 

 

I have a desiccant dehumidifier with a performance calculation from the OEM supplier, I am trying to copy and enter the calculated results in ChemCAD in order to design upstream and downstream systems.

To do this I am using a pre-cooler and a flash unitops. The problem with this solution is that I need to manipulate the cooler air temperature in order to control how much liquid output I get from the flash drum. Preferebaly I would like to keep the correct temperature and instead play with the efficiency of the flash drum until the liquid output reach the level that is shown in the OEM supplier calculations. 

How can I do this? Or can you suggest an alternative method.

[Bobby Strain]

Use a component splitter and specify the streams.

 

Bobby

[Tamar]

Hello,

Thanks for the suggestion, it really got me excited at first. To try this, I used the ChemCAD unitops called "Divider", I assume that is what you meant by a splitter?

The divider allows me to split the inlet stream to multiple outlet streams with any split ratio of the inlet stream - but it seems I can't use this divider to separate my inlet stream and decide the specific composition of each outlet stream? Meaning that I now only get the same stream composition at all outlets but at different mass flow rates?

My dehumidifier has 4 nozzles:
1. Process air in ---> 2. Dry air out
3. Reactivation air in ---> 4. Wet air out

At this point I am only interested about nozzle 1 and 2. I know the composition, pressure and temperature of both these streams based on the OEM calculations. I want be able to design the nozzle 1 upstream system and the nozzle 2 downstream system.

If I use the divider with nozzle 1 as inlet and nozzle 2 as outlet, can I somehow specify all stream data including composition, pressure and temperature for nozzle 2 as divider outlet?

[Bobby Strain]

Try your favorite search engine.

 

Bobby