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jvgr
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Join Date: Oct 2012
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Air to Fuel Ratio

10/04/2012 11:35 PM

What is Air to Fuel ratio in CFBC boilers? and what is the ratio
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Anonymous Poster #1
#1

Re: Air to Fuel ratio

10/05/2012 4:20 AM

The word for today is "stoichiometry."
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Tornado
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#2
In reply to #1

Re: Air to Fuel ratio

10/05/2012 4:22 AM

The other word for today is CFBC, whatever that means.

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PWSlack
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#3

Re: Air to Fuel ratio

10/05/2012 6:23 AM

The same as in any other type of boiler: it is a function of the chemical make-up of the fuel. GA to #1↑. Link.

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durtieduck
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#4

Re: Air to Fuel Ratio

10/05/2012 9:53 PM

the correct ratio is a mixture that produces the least amount of co2.

that the best answer i can give you.
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narendra54
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#5

Re: Air to Fuel Ratio

10/06/2012 8:17 AM

The amount of air required to burn fuel will depend on the ultimate analysis of fuel. As fuel GCV can vary between 2000 -10000 KCAL/kg. The ultimate analysis of fuel also varies accordingly. Hence there is no proper air to fuel ratio. Amount of air has be determined by calculating the stochiometric air required for combustion ( which is determined by the ultimate analysis of fuel). Excess air has to be added above the stochiometric air. For High GCV of fuel Air to fuel ratio will be higher compared to low GCV of fuel.
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fixitorelse
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#6
In reply to #5

Re: Air to Fuel Ratio

10/06/2012 11:20 PM

narendrara54, may I add:

This is why we have the controls we have on todays internal combustion engines. Exhaust gas is looked and and the variable amount of fuel is inserted to the mass of air flowing to the cylinders as it is read and calculated. Very complicated procedure made easier by todays on board computers.
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