14 replies to this topic

[krishanan]

Hi to all,

Please let me know how the following equations are arrived

Stoichometric air lb/lb of fuel = 11.53*C + 34.34*(H2 - (O2/8)) + 4.29*S - Equation-1

Stoichometric air lb/10kbtu = 144*((8.01*C + 23.86*(H2 - (O2/8)) + 3*S)/(HHV) - Eq.-2

Please help me out

Your reply is most appreciable

Rgds
krishna

[breizh]

Google the equations :

11.53*C + 34.34*(H2 - (O2/8)) + 4.29*S

 

and you will get your answer

 

Breizh

[krishanan]

Dear Breizh,

i couldn't get the answer.

 

anyhow thanks for your reply

Edited by krishanan, 27 April 2013 - 06:12 AM.

[breizh]

http://yosemite.epa....E/SI 428A_2.pdf

 

 

http://nepis.epa.gov...ges=1&ZyEntry=4

 

It should help 

 

Breizh 

Edited by breizh, 27 April 2013 - 11:12 PM.

[krishanan]

sir,

i couldn't understand how the second equation arrived. i.e. 144*((8.01*C + 23.86*(H2 - (O2/8)) + 3*S)/(HHV)

 

 

Please help me

[breizh]

This equation is know as Dulong Formula for qualification of fuel

 

http://www.indiastud...ific-value.aspx

 

note : You need to pay attention to the units  .

 

Hope this helps you out.

Breizh

[krishanan]

Dear breizh,

 

I am unable to open file, it says rejected due to poor quality

[breizh]

http://powerplantcon...alculation.html

 

Let you try ! Pay attention to units .

 

Google should support you

 

Breizh

[krishanan]

THANKS FOR YOUR REPLY MR.BREIZH I STILL COULDN'T UNDERSTAND HOW THE FACTOR 144 ARRIVED, COULD YOU PLEASE ELABORATE

[breizh]

I can not help you more , I've added the relation based on energy from Babcok book .

 

 

Breizh

[krishanan]

Dear breizh,

 

There is no content in the file

 

Please attach once again

[breizh]

Dulong formula.(accuracy 2-3%)

 

HHV (Btu/lb) = 14,544 *C+62,028 *(H2-(O2/8))+4050*S

 

HHV (higher heating value); C:mass fraction of Carbon,.....H2 mass fraction of Hydrogen, O2 mass fraction of Oxygen and S mass fraction of sulfur.

 

Hope this helps

 

Breizh

[Shivshankar]

Krishnan,

 

Your 1st equation might be wrong.Is it divided by 100 ?

 

 Give us reference where you got that equation from

 

Check attached copy.

 

 

Regards

Shivshankar

Attached Files

•  eq.bmp   1.78MB   9 downloads

Edited by Shivshankar, 07 May 2013 - 10:03 AM.

[krishanan]

ya, you are right Mr.Shivasankar, It should be devided by 100, but i am not understanding how this 144 comes, is this a common product of all constituents.

Please provide me the full document of your attachment

[krishanan]

Thank you very much Mr.Briezh