3 replies to this topic

[jommic]

Hello Every one

I just design heat exchanger and use Weighted model because in the manual thay suggest that, if heat curve is non lineat shoud be use it, but I want to know how to select the Step Type (Equal Enthalphy or Equal Temperature) and what the criteria do you choose it? (Pressure Profile also)

And what is meaning of TEMA and how to use it

Thank you in advance
Jommic

[Zauberberg]

Jommic,

I'd strongly suggest you to go through heat transfer textbooks before going more deeply into heat exchanger design. Each application is different and there is no general rule of thumb that can be applied in all cases.
Anyhow, Hysys is not a heat exchanger design software. It can give you very accurate heat and mass balance parameters, but certainly nothing more than that - as far as heat transfer equipment design is concerned (unless you have HTFS-TASC module, but still you need a very strong background in designing heat transfer equipment).

TEMA = Tubular Exchanger Manufacturers Association

To get yourself more familiar with these issues, please refer to excellent D. Kern's book "Process heat transfer". Some interesting articles you can find at ChE website as well and by browsing existing heat transfer topics.

http://www-unix.ecs....e/exchanger.pdf

Best regards,

[djack77494]

Jommic,
Based on your questions, I strongly recommend that you consult with a heat exchanger design expert. Also, follow the good advice given by Zauberberg to be in a better position to select/design heat exchangers in the future. Contrary to what some process engineers may think, Hysys, ProII, and other general purpose process simulators are not suitable for designing heat exchangers unless appropriate add-in packages are purchased.
Doug

[jommic]

Thank you for your suggestion

Sorry to make you miss understand, I am simulation heat exchanger by HYSYS (weighted model) and want to know how to select the Step Type and pressure profile. Please give me the guide line or refference to learn it.

Best regards