10 replies to this topic

[f_jafarkazemi]

Hi All,

 

1- What are the best commercial or freeware softwares for orifice sizing in multi-phase flow?  

As far as I know, RW Miller and Conval do not have this option.

 

2- An example application case is attached. Any idea on manual calculation of this case?

 

Thanks in advance.

Attached Files

•  Flow Element Datasheet.xlsx   16.7KB   34 downloads

[Bobby Strain]

Do you want to size a flow meter or restriction orifice?

 

Bobby

[breizh]

Hi,

Some literature to support your work.

Breizh

[chemdoc]

for Excel / Python / OpenOffice  or similar tools to support multiphase equilibria calc's with different HEM - HNE models I would recommend Prode Properties,

 

https://www.prode.com

 

see also the different threads at Cheresources discussing these applications....

[f_jafarkazemi]

Hi Bobby, This is a flow metering application.

[shvet1]

Consult your instrumentation engineer. Pressure drop flow measurement is not suitable for cavitation and 2-phase.

[Bobby Strain]

Look at a coriollis meter instead.

 

Bobby

[breizh]

agree with Bobby.
Breizh

[f_jafarkazemi]

Hi All,

Thanks for all the answers.

 

I also confirm that DP meters are not the best option for multiphase flow measurement but please note that they have been used for this application for a long time.

Some of them like V-cone showed superior result, also.

 

By the way, the question here is how to size the orifice meter for the case mentioned.  

[shvet1]

There is no way as all standards was created for measuring of 1-phase flow. Calibration in-situ are the only option e.g. based on material balance or liquid level in upstream/downstream equipment.

 

Rapid and huge change in fluid properties, unstable flow regime and gas-liquid slip are main reasons prevent a reliable measurement of 2-phase flow.

 

See chap. 6 API 551 for details. Short explanation is - 2-phase flow is able to be measured (somehow) but hard to be predicted.

 

but please note that they have been used for this application for a long time. Some of them like V-cone showed superior result, also.

Sound like a small revolution in process industry. We should know as much as possible about changes coming. Kindly ask you to provide proofs and examples. When, who, how, what reasons&results etc.

Edited by shvet1, 06 June 2023 - 12:36 AM.

[PaoloPemi]

f_jafarkazemi,
search for lor orifice, two phase flow, the first two papers :

https://www.fem.unic...ER/091301_1.pdf

http://archives.umc....82/article6.pdf

in general, for small fractions of liquid fractions  one can presume homogeneous flow and proceed as mentioned by ChemDoc (for example, you can calculate mixed properties with a library as Prode in Excel / Python etc.),
differently there are many options available as noted in previous posts...

some references
Morris S. (1985) Two phase pressure drop across valves and orifice plates. Proc. European Two Phase Fl ow Group Meeting

Campos Baliño Slobodcicov Filho Paz (2014) Orifice plate meter field performance: Formulation and validation in multiphase flow conditions. Experimental Thermal and
Fluid Science

Fadaei,  Ameli, Hashemabadi (2021) Investigation on different scenarios of two-phase flow measurement using orifice and coriolis flow meters: Experimental and modeling approaches.
Measurement: Journal of the International Measurement Confederation

Edited by PaoloPemi, 06 June 2023 - 01:40 AM.