Mechanical Engineering Thermodynamics - Lec 32, pt 1 of 3: Combustion - Excess Air

[@AK-gt8zy]

I was here for Heat Transfer but I'm back for Thermo! 😂 You are such a good lecturer!

[@ronhugo6225]

No - it should be multiplied by 3. 0% excess air is the correct amount of air based on the stoichiometric balance, and thus it is 1*a_th. For 100% excess air it is 100% more air than you need, and thus it is 2*a_th. For 200% excess air it would be 3*a_th.

[@hashimkawhtarali5291]

I have 400% so 5*a_th?

[@LoganLovell]

@@hashimkawhtarali5291 yes

[@Dsp_126]

From which books is this question taken

[@shaikshareefbaba3027]

Sir for 20%

[@RyanBurnett16]

Great video thanks for the help!!

[@harjinderooney]

Thank you so much for all your videos. I really appreciate it and rely on it, again thank you.

[@SultanAlawad]

Thanks a lot. Why didn't you put the stoichiometric equation from the beginning if you knew that you have excess air? I mean you multiply the air by 3 and add the Oxygen to the right.

[@cclh4560]

thx, greetings from Monterrey, México

[@Adil_shares]

Nice vdo

[@MawaMaverick]

Ron you're awesome thanks a lot

[@hakan2499]

a should be 4.5 6:55 ı dont know you still checking youtube but you are great sir

[@d7myQarni]

Thank you so much

[@xRageAgainstMachines]

Thank you

[@muhammaddafi8707]

Sir how if the problem said "the amount of O2 provided in the form of air (21% O2 and 79% N2) should be twice of the amount needed from the reaction" does it mean we have to multiply the a_th by 2 or the excess air is 200% ?

[@edutechguruengineeringlear4280]

ruclips.net/video/VDEyqc2_q_A/видео.html

[@mohammadtorikh]

thank you so much for the time sir

[@fredlyraphael9980]

for 200% excess air should a-theoretical be multiplied by 2?

[@frattanaytac5605]

thanks.....

[@bickromsahamithu7193]

Propane gas is allowed to react with 80% theoretical air. Determine the
theoretical equation for the reaction. what to do in this case?

[@bhakthimd6692]

that will be fuel rich condition, and unburnt hydrocarbons will be present in the products

[@edutechguruengineeringlear4280]

@@bhakthimd6692 ruclips.net/video/VDEyqc2_q_A/видео.html

[@seifmostapha2648]

thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[@alial_deep353]

Thanks

[@physiqueavecsoufiane674]

mercii bcp

[@dreamer7868]

why 200 % excess air deals with 3*theo air?

[@ronhugo6225]

It is just how excess air is defined - it is the amount of air in excess of the stoichiometric amount. Thus 200% excess air is 300% theoretical air.

[@dreamer7868]

@@ronhugo6225 thank you sir.

[@Moh-ii5sf]

Hi could you please make video about combustion for Foundamental test exam please help

[@kobedelantar4634]

I need that too , did you find any videos for that

[@crowdoesfly480]

100% theoretical air = 0% excess air = a_th
200% theoretical air = 100% excess air = 2 a_th
300% theoretical air = 200% excess air = 3 a_th
Am I right?

[@mushyman4603]

yes