simulation software

[rickitek]

i am planning to simulate a jet refrigeration. a jet pump integrated to a refrigeration system. what is the suitable simulation software for this job. thanks!

 

[IRstuff]

Is this for school?

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[rickitek]

nope, it is one of my personal research project aside from my regular job as mechanical engr. i have this idea/innovation/theory i wristle for years and need to prove/confirm before making a prototype

 

[MortenA]

HYSYS can simulate an ejector type pump (i think) but im sure about the details on hpw it do it. Maybe you should be looking af CFD if its very detailed? If not, then i think there must be rules of thumb and correlations out there.

 

[rickitek]

ok i'll check hysys and cfd, thanks!

 

[zdas04]

HySys treats thermocompressors as fixed elements, and doesn't allow for rigorous design iterations.

I bought a program from IHS that was developed by Engineering Sciences Data Unit (EDSU). Module 92042 has the performance calculations for Ejectors and Jet Pumps. I had to find a Fortran Compiler to get it to work, and the input/output feels very 1980. It is difficult to tell if an iteration ran to completion, and it truly is a pain to run. BUT the results are amazing. I modeled a jet pump (that I subsequently got a patent for), and field measurements were all within 3% of predicted performance. I used it to design a couple of other super-sonic ejectors that both performed within 5% of model predictions. As I recall it was truly a pain to find on IHS' web page, and it was a bit expensive (as I recall it was under $1k, but that is just for source code, then I had to find a compiler). I've always threatened to write a Visual Basic front/back end to build the input data file, run the program, and reformat the output file (it is pretty ugly), but every time I've started on it I've had to drop it for revenue generating stuff.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"

 

[rickitek]

thank you guys, i think this is what im looking for, a modeling program for ejector. the critical elements of my system. with regards to compressors, evaporator and condenser its just easy i think i can play it around. ill check all your suggestions/programs on whats best for me

 

[rickitek]

zdas04-IHS program for ejector is quite expensive, is there any other progranm for ejector modeling/designing

 

[zdas04]

There are dozens. They are all proprietary to specific manufacturers and not for sale. If I had been able to find a less expensive and/or less glitchy program I would have bought it.

David Simpson, PE
MuleShoe Engineering

"Belief" is the acceptance of an hypotheses in the absence of data.
"Prejudice" is having an opinion not supported by the preponderance of the data.
"Knowledge" is only found through the accumulation and analysis of data.
The plural of anecdote is not "data"

 

[MartinLe]

If you have a thorough mathematical model of your system and "just" need to solve it, ascend could be for you:

http://ascend4.org/

it's free and developed by several universities, with process engineering in mind, and has a model library that includes some unit operations.

I myself have not really begun learning the software, so I can't really say if it's a suitable tool.

 

[rickitek]

got lots of lead, currently downloading and checking all your suggested programs and well see, maybe a combination of those will do if i can not get ejector modeling apps. thanks for all the help