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Efficiency Variance


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#1 Kangari

Kangari

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Posted 08 August 2018 - 12:48 PM

Hello,

 

I am carrying out some experiments on a small scale fired gas burner with a gas gas heat exchanger at the top. I alter the biogas rate and in some other experiments I alter the air flow rate in the heat exchanger. 

I have realised that efficiency varies widely from 35-70% depending on the air flow and biogas flow.

 

For example as air flow increases (keeping fuel constant), efficiency increases.

What sort of efficiency does a manufacturer indicates in the specifications? Max, Min or Average?

 

Regards

 

Andreas

 

 

PFD: http://docdro.id/HkVK6xW


Edited by Kangari, 14 August 2018 - 04:38 PM.


#2 Bobby Strain

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Posted 08 August 2018 - 01:48 PM

If what you state is true, then your starting air flow is insufficient to burn all the fuel. And this is not a safe operation.

 

Bobby



#3 Kangari

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Posted 08 August 2018 - 02:48 PM

Bobby, I am sorry,I wasn´t clear. I meant the air flow to the heat exchanger.

My system is a fired gas heater with a heat exchanger at the top



#4 Bobby Strain

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Posted 08 August 2018 - 04:44 PM

You have asked a lot of questions about your project. It's about time you provided a sketch or better if you continue to have questions.

 

Bobby


Edited by Bobby Strain, 08 August 2018 - 06:56 PM.





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