Hi! Can I ask what type or what specific cooler can be used to lower the temperature of steam generation system in a chemical plant?

I have used appropriate references for all the values and inputs that I have used for simulation. Please kindly help me out. I have been working through this for quite sometime.

I used unisim for carrying out this. File is attatched below if anyone is free to debug.

Is it possible to model a Monolith reactor in ASPEN PLUS or ASPEN HYSYS? How?

I've been consistently having problems getting the HeatX block to properly initialize at the output temperature, particularly for the cold stream temp spec. To be more specific, if I were to reinitialize the run as per the attached pic, S4 would refuse any sort of temp specification, rendering the stream completely stuck at that point. Even when I've tried inputting the pressure and temp to stream S4 as an initial guess from a freshly ran HeatX, I still have the same error.

So far the only way I managed to get it to iterate properly is to first use a simple heater block to complete the S3 -> S4 connection with a specified output temp + P, and replace it with a HeatX block with S3 and S4 as the 'cold in' and 'cold out' connections respectively, followed by connecting the S5 and S1 as 'hot in' and 'hot out' respectively. From there, it would properly iterate until it converges into an agreeable heat transfer unit.

But having to remake a section of the flowsheet entirely, just to test out different specs upstream, is not a testing methodology I'm willing to settle for.

I'm on V12 of the software, if that helps. I haven't encountered anything similar to this in Aspen HYSYS, so I was just wondering if I missed some proper initialization step or setting somewhere. Thanks in advance for your time and help.

I am trying to model a single-effect absorption refrigeration system using LiBr/H2O in Aspen Plus. Who can help me model the absorption cooling system? Please send a private message.

The formulas for the shell and tube heat exchanger can't exactly be used for this since the coolers/heaters only have 1 inlet and 1 outlet, unlike heat exchangers that have tube inlet & outlet, as well as shell inlet and outlet. Also, there is no heat transfer coefficient for coolers/heaters unlike heat exchangers.

What other parameters can I compute? Can I ask for formulas that I can use for the specification sheet I'm making for coolers and heaters?

Thank you so much!

Since it doesn't use kinetic data.

You give me some articles or links about it. 

Thanks in advanced. 

For Water- Ammonia some papers are presented that doesn't match with default EOSs presented in Aspen and Hysys. I want to exactly implement the paper in the softwares.