4 replies to this topic

[linda_pro]

Hi there,
I am doing Gas dispersion analysis for Vent Raiser on FPSO.
Unlucky, it doesn't have any simulation software in my company.
Then I think I have to do it by manual.
However, I don't know how to do that and which documents I should use...
if anyone has done this before, please advise me.

Thank you very much.
Linda

[breizh]

Hi Linda,

Let you consider this reference :

http://www.air-dispersion.com/

Hope this helps

Breizh

[ankur2061]

Linda,

A spreadsheet for plume dispersion modeling is available at:

http://www.rccostello.com/Airmod1.xls

It is based on the gaussian plume model and is a very simple excel sheet with certain inputs to be provided.

Alternatively you can go to the U.S. EPA (Environmental Protection Agency) web link and download their very extensive air dispersion modeling program "AERMOD" to perform your plume dispersion calculations. I have not used this but this is also based on the gaussian model for plume dispersion and is considered to be very reliable. Below is the link:

http://www.epa.gov/s...frec.htm#aermod

Hope this helps.

Regards,
Ankur.

[linda_pro]

Thanks all for your advices.

Regards,
Linda

[kkala]

I am doing Gas dispersion analysis for Vent Raiser on FPSO.
Unlucky, it doesn't have any simulation software in my company.
Then I think I have to do it by manual.
However, I don't know how to do that and which documents I should use...
if anyone has done this before, please advise me

I would use Aloha (freely available by EPA) as a first software, merely for its simplicity. Most relevant software packages require a lot of meteorological data to give some results, so you may feel confused. The disadvantage of Aloha is that it considers zero exit velocity for stack gases. Others say its results are too conservative concerning SO2. But we have applied Aloha in a seveso II (safety) study in 2006 and we saw it has a clear documentation .
After getting some familiarization with Aloha before proceeding to another software.
Another option is to make the software by yourself, which needs 15-30 calendar days for writung, debugging, testing, etc.
Instead of Aloha, you can adopt any simple known software.