Cv is molar heat capacity at constant volume, during A to B the process is compression, volume does change, but you said that work done is always n*Cv*delta(T) (that's true) but aren't these 2 things contradictory to each other?
We meet again ! I thouht I'd never meet you again after first year, now we meet at Fluid Mechanics and Thermodynamics ENG 3165 😅 Fellow Beng Works say Heyo !
i have a question following the otto cycle you can reemplace the "terms", and calculate lets say the point at PC using the same formula??? min 22:09 of the video pc= pb (tc/tb) * r
So, the efficiency of gasoline is directly proportional to the percentage of hydrogen and inversely proportional to the percentage of carbon.The mass of hydrogen is 13%, the mass of carbon is 87%. If the percentage of hydrogen is increased the percentage of energy is increased but the percentage of carbon is decreased. This means that the inefficiency of gasoline (the carbon) can be removed. If a vehicle goes 100 miles and burns 2.5 gallons (7.144 kg) of gasoline 7144 ÷ 100 = 71.44 grams of gasoline per mile but if the hydrogen is doing all the work then 77.44 - 87% = 9.287 grams per mile. Does anybody really think we can get to 0.00 grams per mile.
If the theoritical efficiency of an internal combustion engine with so low pressure ratio is so high (over 50% for under 9) why cars' enginees are so inefficient and need so big amounts of fuel in order to produce mechanichal work? Why engine producers strugle with more high pressure ratio and more low lamda ratio in order to make them more efficient? I think about mabe if the real gamma ratio is in reality lower than 1,4 so that's why the efficiency is pretty low,and with a research and study on the theme i thing that brcause of the flown composistion for lamba =1 the real gamna is around 1.15 ,i calculated so.
Sir I want solution for this sum ""an otto cycle takes in air at 300k the ratio of maximum to minimum temperature is 6 .find out the optimum compression ratio for maximum output of the cycle."""
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All rounder...this man should be given an award.....a genius per excellence
I’m boutta give a reach around pal
we need more internal combustion engine problems, there's too little results to see when searching for them. thank you for your hard work :>
The greatest teacher ever walk on the planet yes
Sir you deserve a noble price award.
You teach almost everything. ❤❤
Why is there no video on Diesel Cycles? 😭😭
Mhhh you are a great and great of all time.... Please don't stop 🛑
You're such a gem.......We appreciate!
this man is a legend
Cv is molar heat capacity at constant volume, during A to B the process is compression, volume does change, but you said that work done is always n*Cv*delta(T) (that's true) but aren't these 2 things contradictory to each other?
How are they contradictory?
this is lit
We meet again !
I thouht I'd never meet you again after first year, now we meet at Fluid Mechanics and Thermodynamics ENG 3165 😅
Fellow Beng Works say Heyo !
thank you, you're a legend
i have a question following the otto cycle you can reemplace the "terms", and calculate lets say the point at PC
using the same formula???
min 22:09 of the video
pc= pb (tc/tb) * r
absolute sort-out, ur a god
Good vid.
Thanks dude.
The processes that you mentioned at 9:02 are not isochoric, the volume changes during that process.
No, not in the Otto cycle. It does change in the Carnot cycle however.
Is this the same as the one called 'Beau de Rochas cycle' ?
How might throttle and mixture(fuel/air ratio) play into all of this?
Sa fuel na Po yon, sa air and fuel ratio na Po yon may ibang computation Po Jan sir.
So, the efficiency of gasoline is directly proportional to the percentage of hydrogen and inversely proportional to the percentage of carbon.The mass of hydrogen is 13%, the mass of carbon is 87%. If the percentage of hydrogen is increased the percentage of energy is increased but the percentage of carbon is decreased. This means that the inefficiency of gasoline (the carbon) can be removed. If a vehicle goes 100 miles and burns 2.5 gallons (7.144 kg) of gasoline 7144 ÷ 100 = 71.44 grams of gasoline per mile but if the hydrogen is doing all the work then 77.44 - 87% = 9.287 grams per mile. Does anybody really think we can get to 0.00 grams per mile.
Holy fu** you're teaching Internal Combustion Engine now?!!
I am having exam on thermodynamics ...so plz help me sir
for delta u = n*CV*deltaT, what is n? Is it the number of moles in the specific mass of the substance?
number of moles
If the theoritical efficiency of an internal combustion engine with so low pressure ratio is so high (over 50% for under 9) why cars' enginees are so inefficient and need so big amounts of fuel in order to produce mechanichal work?
Why engine producers strugle with more high pressure ratio and more low lamda ratio in order to make them more efficient?
I think about mabe if the real gamma ratio is in reality lower than 1,4 so that's why the efficiency is pretty low,and with a research and study on the theme i thing that brcause of the flown composistion for lamba =1 the real gamna is around 1.15 ,i calculated so.
Its because it does not account for heat transfer to engine components like the cylinder wall and piston and friction
Is Qh=Qc?
no
It’s Qh/Qc
doesn't the P(b)/P(a) = r^gamma?
Plz let me know fastlly sir
Sir I want solution for this sum ""an otto cycle takes in air at 300k the ratio of maximum to minimum temperature is 6 .find out the optimum compression ratio for maximum output of the cycle."""