I am in process of calculating depressurization rate for condensate dehydrator. LPG condensate composition as follows: Component Mole. Dear all I have to simulate a depressurization of a plant gas working at 69 barg ( Pdesign=74 barg) with Hysys. I know that I have to do 2. HYSYS Depressurisation Example – Free download as PDF File .pdf), Text File . txt) or read online for free. Depressurization Hysys.

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C3 Liquid Volume 1 0. Download Now Defense manufacturing is all about project manufacturing and project accounting. It can be used for general depressuring valves to flare. It may be a good idea to reduce the step size if the flow rate is significantly larger than the volume or if the vessel depressurises in a relatively short amount of timesay 1 minute. Remember me This is not recommended for shared computers. The Eng-Tips staff will check this out and take appropriate action.

A Practical Guide Updated for Version 3.

Depressurization By Hysys

The area A should be a value between 0. I’ve forgotten my password.

The discharge coefficient Cd should be a value between 0. Featured Articles Check out the depressurisation featured articles.

For non-controlled depressuring system, other equations such as [Relief], [Supersonic], [Subsonic] and [General] may be used.


The following table is an example showing how depressurizatoin C3 term affects the wetted area calculation. This means that all material in the vessel has been flashed together and is in thermodynamic equilibrium.

Register now while it’s still free! In most depressurixation, C1 will be equal to In my point of view, [Fisher] and [Masoneilan] equations will be used when controlled depressuring system. It should be used when the valve throat area is known. The calculations are repeated until the final pressure is reached in the given amount of depressuring time.

HYSYS Depressurization – Aspen Technology products – Eng-Tips

The final pressure depressurizatiin given when the Depressuring Time has elapsed. What you can do to help our friend “Environment”? Liquid Slug Stabiliser – Another type of slugcatch Thank you October 7, at 2: If the Recycle Efficiencies were to be reduced a portion of the material would by-pass the flash calculation and the vapour and liquid would no longer instantaneously reach equilibrium.

No external heat is applied so no parameters need to be entered in this section. If any of user aware of it, please share in the comments depressurizatikn. A more in depth discussion of the different methods follows in Section 2.

Depressurisation: A Practical Guide HYSYS | PEDRO DIAZ –

Defense manufacturing is all about project manufacturing and project accounting. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Masoneilan This equation was taken from the Masoneilan catalogue. A higher isentropic efficiency results in a lower final temperature. If the depressuring time is reached before the final pressure is achieved, then the calculations stop and a new Cv hyysys area is calculated using the final pressure.


Entering Vessel Parameters Ideally, the depressurizatlon size will be known and this data can be entered into the appropriate fields on the form shown above. The two options differ only in the type of value calculated. To account for piping or head volume depressudization, a small amount can be added to the height or length of the vessel if the user so requires.

A variable can be added by pressing the “Add Variable” button and selecting it from the list of simulation variables.

A more realistic hold up time to use is 4 minutes. Heat flux into the fluid is user defined using the following equation: A higher yhsys results in a lower final temperature. These are both described in most textbooks about thermodynamics. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.