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I apologize for the confusion. I thought assigning made up values would help to clarify my question.

I created this post to help me better understand how to deal with pressure drop in parallel. Can you explain to me why I need to define a fictitious flow for this fictitious and extremely simplified example scenario?

You are right! But I knew this. Granted, my understanding of the relationship between flow and pressure could easily be used as an example of the Dunning-Kruger effect. I just find it easier to understand if I think of the suction as something consumed by the pressure drop. I know it is not...

Embarrassingly, after rereading your post for about 30 minutes, I finally got it. The way I now like to think about it is in terms of inlet and outlet pressures. The outlet pressure of both units 1 and 2 is created by the suction of the fan. This suction pressure exists in line 3 and therefore...

Assume any flow you want. What I want to know is does the fan need to be sized for 7"wc or 14"wc static pressure. This is ignoring that fact that I would need to know desired suction pressure at the inlet of unit 1 and 2, and the desired outlet pressure of the fan.

I am a chemical engineer working on a spreadsheet that calculates heat capacity using the Joback method (see links below if you need more information on the Joback method). For this calculator, I am creating a database of chemical compounds and their functional groups, but it is taking too long...

Imagine you have two ducts (ducts 1 and 2) that merge into a single duct (duct 3). There is a fan located on duct 3 that needs to pull air through ducts 1, 2, and 3, and then exhaust it through duct 4. Both ducts 1 and 2 have obstructions that cause a pressure drop of 7 inches of water column...

This is exactly what I was hoping for!

You're probably right about me not knowing what I don't know, and I should have clarified more. I am not fully left to my own devices, as my supervisor is always there to answer any questions I have and look over my work. However, I want to be able to do some learning on my own time, so I was...

I am a chemical engineer fresh out of college and have landed myself a job as a project engineer. Part of my job is spec-ing and ordering electrical parts like actuators, VFDs, proximity switches (pressure and level switches too), etc. I lack a lot of the basic knowledge when it comes to...

Yes it does, thank you.

Ideally, I am searching for a table that list common catalyst (specifically for oxidizers) and their known poisons.

Thank you

There is a forced draft process blower between the tank and the oxidizer. The blower is what is controlling the flow, not the nitrogen.

Yeah, I knew my problem was with my gc, but correcting it would cause my C variable to be wrong. I ended up converting imperial units to metric units, solving using the method in the article, then converting my final answer to imperial units. There is still issue with this method, but my answer...

To “work around” this problem, I solved for the area by converting from imperial to metric, using the article’s constants and formulas, and then converting back to imperial units. I compared the answer my sheet gives me with other sources I have, and the results were close. At most, it’s off by...

The article gives it in units of Kg-m/N-s^2 which is essentially unitless. Like reynolds number.

I am trying to make a pressure relief valve calculation in Excel for determining the minimum required area of discharge to get a desired mass flow rate. I am using the ACHIE relief valve sizing article and the example in it to validate my calculations. However, when I convert the metric units to...

I understand, thank you! You found me again LittleInch.

My vendor told me they had nothing in their catalog that would work. Thank you for bringing this to my attention. However, I do not understand the maximum full-scale value for liquid? Where does this number come from? Also, the gas density at operating conditions will change, so why does the...