I really appreciate all of you. You have all been a big help in both, wrapping my mind around how and why it is the way it is, as well as making the appropriate changes to my Excel graphs that indicate the relationship between phases correctly... which really was as simple as subtracting one...
Hello all,
I'm in the process of learning about 3 phase power and how to wire loads to a generator. I've searched high and low with as many sentence structures as I could think of in the google search bar and I can't seem to find the answers I'm looking for. I'm really hoping you guys can...
Seems that you're enjoying the challenge of figuring this out too. I'm really happy to have someone so capable helping to figure this out with me. Thank you Chet. I'm still not up to speed yet and getting somewhat lost in some of the calculations. I'll post up some specific questions in the...
Thoughts... It's new territory for me. I'm having to look up a lot of the things you're mentioning to properly understand them, so I'm not quite eye to eye with you yet. Still a day or two worth of posts behind on the learning curve.
However, I have used equations for Adiabatic Compression...
Looks like a good book to have, although at over $100 used it's a little too spendy for my purposes.
If there's a way to do it without referencing the book, that would be my preference.
You're ahead of me, which is fine. Once it's here, I can soak up the information at whatever rate.
I'm not sure that the final temperature is what I expected. Seems high, but if that's what it is, then that's what it is.
I'm guessing that for adiabatic compression, we'll need to average the...
Whatever's easier. As long as the results accurately indicate a trend. I pretty much don't care how precise the product is, as long as it's repeatable per individual air/fuel ratios.
The ultimate reason behind my trying to figure this out is, engines make more horsepower with richer than...
Based on this percent of total mass composition of air breakdown, in/at engineeringtoolbox.com
% of Total Mass, Air
Oxygen .... 23.20%
Nitrogen ... 75.47%
Carbon Dioxide .. 0.046 %
Hydrogen ... ~ 0%
Argon ... 1.28 %
Neon .... 0.0012%
Helium ..... 0.00007%
Krypton .... 0.0003%
Xenon ...
I really appreciate your help with this Chestermiller
Imperial is easier for me to relate to. However, SI seems easier to calculate with.
Let's work in SI.
It seems that using the mass ratio to calculate nitrogen content is slightly more accurate than using the molar ratio. If there's not...
Since we're doing everything by weight, wouldn't you calculate the nitrogen weight from the oxygen weight and identify the number of moles N2 by it's weight per mole?
(12.5 * 32g/mol) = 400 g
400g / (79/21) = 1504 g
1504 / 28g/mol = 54 moles of N2
Simply basing it on the mole negates the...
Apparently the air composition of 79/21 is based on volume. By mass it's 23.2% O2 and 76.8% N2 and other inert gasses.
Adjusting for that brings the ratios quite a bit closer to what I expected to see.
15.09:1 for Octane
8.98:1 for Ethanol
6.46:1 for Methanol
The total mass now also balances between pre and post combustion
Post combustion
H2O ... 0.357452336 lb ... 8.03%
CO2 ... 0.7761953474 ... 17.44%
N2 ... 3.317310438 ... 74.53%
Total .. 4.4509581214 ... 100.00%