×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# Calculating Dilution

## Calculating Dilution

(OP)
I need your help! I'm an EE playing a ChemE.

I'm trying to calculate the dilution factor of two gasses. I have a gas that is mixed with zero air using a timed valving scheme. Both the gas and zero air use a common flow rate(200ml/min). This is plumbed in such a way that the output of the previously described gas is ran into a three-way inlet with zero air at a variable flow rate(X). My questions is how do I calculate the final dilution factor if I know the stage one flow rates, the initial dilution factor, and the second stage zero air flow rate?

Thanks to anyone that can help me!

-Eric

### RE: Calculating Dilution

Hello Eric,

do I understand your setup correctly? (attachment)

If yes, then the final dilution factor is:
DF(final) = DF(initial) * (200 + 200 + x) / 200

E.g. if your initial DF is 1 (no dilution) and the x = 0, you get a dilution of 2 ie. your gas is diluted twice.

(I have used the definition of dilution factor as "ratio of the mixture volume and the specific component volume")

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!