Recent content by InquisitiveOne

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    Why do 120° phase-separated waveforms sum to 208V in 3 phase power?

    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...
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    Why do 120° phase-separated waveforms sum to 208V in 3 phase power?

    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...
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    Constant volume pressure from combustion at different air/fuel ratios

    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...
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    Constant volume pressure from combustion at different air/fuel ratios

    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...
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    Constant volume pressure from combustion at different air/fuel ratios

    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.
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    Constant volume pressure from combustion at different air/fuel ratios

    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...
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    Constant volume pressure from combustion at different air/fuel ratios

    I don't know. What is it and how may I gain access? Nothing really relevant came up on the first page of a search.
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    Constant volume pressure from combustion at different air/fuel ratios

    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...
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    Constant volume pressure from combustion at different air/fuel ratios

    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 ...
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    Constant volume pressure from combustion at different air/fuel ratios

    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...
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    Constant volume pressure from combustion at different air/fuel ratios

    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...
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    Constant volume pressure from combustion at different air/fuel ratios

    Interesting. I had pretty much all the same figures which I thought were in grams, so I converted them all to pounds. No need?
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    Constant volume pressure from combustion at different air/fuel ratios

    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
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    Constant volume pressure from combustion at different air/fuel ratios

    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%